Toyota Prius - Electrical Wiring

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FOREWORD This wiring diagram manual has been prepared to provide information on the electrical system of the 2003 PRIUS.

Applicable models: NHW11 Series

For service specifications and repair procedures of the above models other than those listed in this manual, refer to the following manuals;

Manual Name D 2003 PRIUS Repair Manual Volume 1 Volume 2 D 2003 TOYOTA New Car Features

Pub. No. RM957U1 RM957U2 NCF228U

All information in this manual is based on the latest product information at the time of publication. However, specifications and procedures are subject to change without notice.

CAUTION When repairing the hybrid vehicle (HV), always follow the direction given in the repair manual listed above to prevent electrical shock, leakage or explosion.

NOTICE When handling supplemental restraint system components (removal, installation or inspection, etc.), always follow the direction given in the repair manuals listed above to prevent accidents and supplemental restraint system malfunction.

A INTRODUCTION This manual consists of the following 13 sections: Section

No.

Description

INDEX

Index of the contents of this manual.

INTRODUCTION

Brief explanation of each section.

B

HOW TO USE THIS MANUAL

Instructions on how to use this manual.

C

TROUBLE– SHOOTING

Describes the basic inspection procedures for electrical circuits.

D

ABBREVIATIONS

Defines the abbreviations used in this manual.

E

GLOSSARY OF TERMS AND SYMBOLS

Defines the symbols and functions of major parts.

F

RELAY LOCATIONS

Shows position of the Electronic Control Unit, Relays, Relay Block, etc. This section is closely related to the system circuit.

G

ELECTRICAL WIRING ROUTING

Describes position of Parts Connectors, Splice points, Ground points, etc. This section is closely related to the system circuit.

INDEX

Index of the system circuits.

SYSTEM CIRCUITS

Electrical circuits of each system are shown from the power supply through ground points. Wiring connections and their positions are shown and classified by code according to the connection method. (Refer to the section, ”How to use this manual”). The ”System Outline” and ”Service Hints” useful for troubleshooting are also contained in this section.

I

GROUND POINT

Shows ground positions of all parts described in this manual.

J

POWER SOURCE (Current Flow Chart)

Describes power distribution from the power supply to various electrical loads.

K

CONNECTOR LIST

Describes the form of the connectors for the parts appeared in this book. This section is closely related to the system circuit.

L

PART NUMBER OF CONNECTORS

Indicates the part number of the connectors used in this manual.

M

OVERALL ELECTRICAL WIRING DIAGRAM

Provides circuit diagrams showing the circuit connections.

A

H

2 2003 PRIUS (EWD493U)

HOW TO USE THIS MANUAL B This manual provides information on the electrical circuits installed on vehicles by dividing them into a circuit for each system. The actual wiring of each system circuit is shown from the point where the power source is received from the battery as far as each ground point. (All circuit diagrams are shown with the switches in the OFF position.) When troubleshooting any problem, first understand the operation of the circuit where the problem was detected (see System Circuit section), the power source supplying power to that circuit (see Power Source section), and the ground points (see Ground Point section). See the System Outline to understand the circuit operation. When the circuit operation is understood, begin troubleshooting of the problem circuit to isolate the cause. Use Relay Location and Electrical Wiring Routing sections to find each part, junction block and wiring harness connectors, wiring harness and wiring harness connectors, splice points, and ground points of each system circuit. Internal wiring for each junction block is also provided for better understanding of connection within a junction block. Wiring related to each system is indicated in each system circuit by arrows (from__, to__). When overall connections are required, see the Overall Electrical Wiring Diagram at the end of this manual.

3 2003 PRIUS (EWD493U)

B HOW TO USE THIS MANUAL ∗ The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.

[A]

STOP LIGHT FROM POWER SOURCE SYSTEM (SEE PAGE 66)

,,,,,,,,,, ,,,,,,,,,, ,,,,,,,,,, ,,,,,,,,,, ,,,,,,,,,, ,,,,,,,,,, ,,,,,,,,,, ,,,,,,,,,, ,,,,,,,,,, [C]

15A STOP

7. 5A GAUGE

4 IB

2

1

,,,, @@@@ €€€€ ÀÀÀÀ @@@@ €€€€ ÀÀÀÀ ,,,, @@@@ €€€€ ÀÀÀÀ ,,,, @@@@ €€€€ ÀÀÀÀ ,,,, @@@@ €€€€ ÀÀÀÀ ,,,, @@@@ €€€€ ÀÀÀÀ ,,,, @@@@ €€€€ ÀÀÀÀ ,,,, 7 3C

[G]

15 3C R–L

W–R

R (W/G)

3 IB

L (S/D)

[B]

R–L

4 2

C7 REAR LIGHTS WARNING LIGHT [COMB. METER]

S6 STOP LIGHT SW 14

[E]

IE1

13

1 G–W

[D]

L (S/D)

I5

[F]

G–W

Y–G

G–W TO ABS ECU

[H]

7

L4 LIGHT FAILURE SENSOR

8 DELAY CIRCUIT

[J]

B18

H17 HIGH MOUNTED STOP LIGHT

[L] 1

W–B B18 W–B

1 BV1

W–B

W–B

W–B

3

2

BO

50

[M]

BL

[N]

4 2003 PRIUS (EWD493U)

W–B

4

[K]

(SHIELDED) R6 STOP LIGHT RH [REAR COMB. LIGHT LH]

R7 STOP LIGHT RH [REAR COMB. LIGHT RH]

G–R

G–R

G–R

1 BV1

3

11

G

[I]

4

1

G–R

2

4

B [I]

[A] : System Title [B] : Indicates a Relay Block. No shading is used and only the Relay Block No. is shown to distinguish it from the J/B Example:

Indicates Relay Block No.1

: Indicates the wiring color. Wire colors are indicated by an alphabetical code. B

= Black

W = White

BR = Brown

L

= Blue

V

SB = Sky Blue

= Violet

R = Red

G = Green

LG = Light Green

[C] : ( ) is used to indicate different wiring and connector, etc. when the vehicle model, engine type, or specification is different.

P

Y

GR = Gray

[D] : Indicates related system.

The first letter indicates the basic wire color and the second letter indicates the color of the stripe.

[E] : Indicates the wiring harness and wiring harness connector. The wiring harness with male terminal is shown with arrows ( ). Outside numerals are pin numbers.

= Pink

= Yellow

O = Orange

Example:

L–Y

L (Blue)

Female

Male (

Y (Yellow)

[J] : Indicates a wiring Splice Point (Codes are ”E” for the Engine Room, ”I” for the Instrument Panel, and ”B” for the Body).

)

The first letter of the code for each wiring harness and wiring harness connector(s) indicates the component’s location, e.g, ”E” for the Engine Compartment, ”I” for the Instrument Panel and Surrounding area, and ”B” for the Body and Surrounding area. When more than one code has the first and second letters in common, followed by numbers (e.g, IH1, IH2), this indicates the same type of wiring harness and wiring harness connector. [F] : Represents a part (all parts are shown in sky blue). The code is the same as the code used in parts position. [G] : Junction Block (The number in the circle is the J/B No. and the connector code is shown beside it). Junction Blocks are shaded to clearly separate them from other parts.

Example:

,,,, ,,,, 3C indicates ,,,, that it is inside ,,,, Junction Block ,,,, No.3 ,,,, ,,,,

The Location of splice Point I 5 is indicated by the shaded section. [K] : Indicates a shielded cable.

[L] : Indicates the pin number of the connector. The numbering system is different for female and male connectors. Example: Numbered in order from upper left to lower right

Female

Numbered in order from upper right to lower left

Male

[M] : Indicates a ground point. [H] : When 2 parts both use one connector in common, the parts connector name used in the wire routing section is shown in square brackets [ ].

The first letter of the code for each ground point(s) indicates the component’s location, e.g, ”E” for the Engine Compartment, ”I” for the Instrument Panel and Surrounding area, and ”B” for the Body and Surrounding area. [N] : Page No.

5 2003 PRIUS (EWD493U)

B HOW TO USE THIS MANUAL [O]

SYSTEM OUTLINE Current is applied at all times through the STOP fuse to TERMINAL 2 of the stop light SW. When the ignition SW is turned on, current flows from the GAUGE fuse to TERMINAL 8 of the light failure sensor, and also flows through the rear lights warning light to TERMINAL 4 of the light failure sensor. STOP LIGHT DISCONNECTION WARNING When the ignition SW is turned on and the brake pedal is pressed (Stop light SW on), if the stop light circuit is open, the current flowing from TERMINAL 7 of the light failure sensor to TERMINALS 1, 2 changes, so the light failure sensor detects the disconnection and the warning circuit of the light failure sensor is activated. As a result, the current flows from TERMINAL 4 of the light failure sensor to TERMINAL 11 to GROUND and turns the rear lights warning light on. By pressing the brake pedal, the current flowing to TERMINAL 8 of the light failure sensor keeps the warning circuit on and holds the warning light on until the ignition SW is turned off.

[P]

SERVICE HINTS S6 STOP LIGHT SW 2–1 : Closed with the brake pedal depressed L4 LIGHT FAILURE SENSOR 1, 2, 7–GROUND : Approx. 12 volts with the stop light SW on 4, 8–GROUND : Approx. 12 volts with the ignition SW at ON position 11–GROUND : Always continuity

[Q]

: PARTS LOCATION Code

See Page

See Page

Code

See Page

34

L4

36

R7

37

H17

36

R6

37

S6

35

: RELAY BLOCKS

[R] Code 1

[S]

Code

C7

@@@ €€€ ÀÀÀ ,,, ,,, @@@ €€€ ÀÀÀ ,,, @@@ €€€ ÀÀÀ Code

See Page 18

Relay Blocks (Relay Block Location) R/B No.1 (Instrument Panel Left)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR See Page

Junction Block and Wire Harness (Connector Location)

IB

20

Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)

3C

22

Instrument Panel Wire and J/B No.3 (Instrument Panel Left Side)

[T]

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code

See Page

Joining Wire Harness and Wire Harness (Connector Location)

IE1

42

Floor Wire and Instrument Panel Wire (Left Kick Panel)

BV1

50

Luggage Room Wire and Floor Wire (Luggage Compartment Left)

[U]

: GROUND POINTS Code

See Page

Ground Points Location

BL

50

Under the Left Quarter Pillar

BO

50

Back Panel Center

[V]

: SPLICE POINTS Code I5

See Page 44

Wire Harness with Splice Points Cowl Wire

Code B18

6 2003 PRIUS (EWD493U)

See Page 50

Wire Harness with Splice Points Luggage Room Wire

B [O] : Explains the system outline. [P] : Indicates values or explains the function for reference during troubleshooting. [Q] : Indicates the reference page showing the position on the vehicle of the parts in the system circuit. Example : Part ”L4” (Light Failure Sensor) is on page 36 of the manual. ∗ The letter in the code is from the first letter of the part, and the number indicates its order in parts starting with that letter. Example : L 4

Á Á

Parts is 4th in order Light Failure Sensor

[R] : Indicates the reference page showing the position on the vehicle of Relay Block Connectors in the system circuit. Example : Connector ”1” is described on page 18 of this manual and is installed on the left side of the instrument panel. [S] : Indicates the reference page showing the position on the vehicle of J/B and Wire Harness in the system circuit. Example : Connector ”3C” connects the Instrument Panel Wire and J/B No.3. It is described on page 22 of this manual, and is installed on the instrument panel left side. [T] : Indicates the reference page describing the wiring harness and wiring harness connector (the female wiring harness is shown first, followed by the male wiring harness). Example : Connector ”IE1” connects the floor wire (female) and Instrument panel wire (male). It is described on page 42 of this manual, and is installed on the left side kick panel. [U] : Indicates the reference page showing the position of the ground points on the vehicle. Example : Ground point ”BO” is described on page 50 of this manual and is installed on the back panel center. [V] : Indicates the reference page showing the position of the splice points on the vehicle. Example : Splice point ”I5” is on the Cowl Wire Harness and is described on page 44 of this manual.

7 2003 PRIUS (EWD493U)

B HOW TO USE THIS MANUAL The ground points circuit diagram shows the connections from all major parts to the respective ground points. When troubleshooting a faulty ground point, checking the system circuits which use a common ground may help you identify the problem ground quickly. The relationship between ground points ( EA , IB and IC shown below) can also be checked this way.

I GROUND POINT FAN MAIN RELAY

5

A/C FAN RELAY NO.2

5

A/C FAN RELAY NO.3

5

E3

O/D MAIN SW

E3

CLOCK

W–B

A

A

A

A

E5

E6

W–B

FRONT SIDE MARKER LIGHT RH

W–B

FRONT SIDE MARKER LIGHT LH

W–B

BRAKE FLUID LEVEL WARNING SW W–B

W–B

,,,, ,,,, ,,,, ,,,, ,,,, ,,,, ,,,, ,,,, ,,,, ,,,, ,,,, ,,,, ,,,, ,,,, ,,,, ,,,, ,,,, ,,,, ,,,,

W–B

I4 W–B

2 IA1

B4

COMBINATION METER W–B

1 3D

W–B

CRUISE CONTROL MIRROR SW

3 3F

W–B

REMOTE CONTROL MIRROR SW

13 3G

W–B TURN SIGNAL FLASHER

5 W–B 3E

I2

REAR WINDOW DEFOGGER SW

6 3E

I2

LIGHT CONTROL SW [COMB. SW] WIPER AND WASHER SW [COMB. SW]

W–B

I5

15 ID1

W–B

W–B I5

W–B

W–B BLOWER RESISTOR 8 IB1 W–B

I8

W–B A/C AMPLIFIER

4

4

POWER WINDOW CONTROL RELAY

B5

DOOR KEY LOCK SW LH

B5

DOOR LOCK CONTROL SW

FUEL CONTROL SW 3 IC3

I5

W–B WOOFER AMPLIFIER BR

COMBINATION METER

4 BR

BR 4

I3

BR I3

COMBINATION METER BR FUEL SENDER

W–B

4

BR

BR

5 BA1

W–B

AUTO ANTENNA MOTOR

B5

(4A–GZE)

W–B HEATER RELAY

POWER WINDOW MASTER SW

I5

4 W–B

BR

B5

DOOR LOCK MOTOR LH W–B

4 RADIO AND PLAYER

UNLOCK WARNING SW

W–B

W–B

HORN SW [COMB. SW] DIMMER SW [COMB. SW]

I2

W–B

10 EA2

I4

BLOWER SW

I5

W–B

B4

W–B

I6

W–B

EA

ELECTRICAL IDLE−UP CUT RELAY (M/T)

HEATER SERVO MOTOR AMPLIFIER

PARKING BRAKE SW

7 W–B 3C

E4

B4

I6

W–B

7 3B

W–B

DOOR LOCK MOTOR RH

W–B

E5

E4

W–B

A

J1 JUNCTION CONNECTOR

W–B

DOOR KEY LOCK SW RH

W–B

E4

W–B

W–B

A

E2

E4

W–B HEATER CONTROL ASSEMBLY

W–B

E3

W–B

DOOR LOCK CONTROL SW RH

DOOR LOCK CONTROL RELAY

CIGARETTE LIGHTER

E3

W–B

RETRACT MOTOR LH

PARKING LIGHT LH

W–B

W–B

RETRACT MOTOR RH

FRONT TURN SIGNAL LIGHT LH

W–B

W–B

RETRACT CONTROL RELAY

PARKING LIGHT RH

W–B

W–B

RADIATOR FAN MOTOR

FRONT TURN SIGNAL LIGHT RH

W–B

W–B

5

W–B

FAN MAIN RELAY

IB

∗

IC

The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.

8 2003 PRIUS (EWD493U)

B The ”Current Flow Chart” section, describes which parts each power source (fuses, fusible links, and circuit breakers) transmits current to. In the Power Source circuit diagram, the conditions when battery power is supplied to each system are explained. Since all System Circuit diagrams start from the power source, the power source system must be fully understood.

J POWER SOURCE (Current Flow Chart) The chart below shows the route by which current flows from the battery to each electrical source (Fusible Link, Circuit Breaker, Fuse, etc.) and other parts. 10A ECU–B Short Pin

2

2 7.5A DOME

15A EFI Battery

30A AM2

Fusible Link Block

2

10A HAZARD

6

2 20A RADIO NO.1 Starter

S2 10A HORN 100A ALT

60A ABS

6

5

Engine Room R/B (See Page 20) Fuse 20A

10A

System

Page

STOP

ABS ABS and Traction Control Cruise Control Electronically Controlled Transmission and A/T Indicator Multiplex Communication System

194 187 180 166 210

DOME

Cigarette Lighter and Clock Combination Meter Headlight Interior Light Key Reminder and Seat Belt Warning Light Auto Turn Off Theft Deterrent and Door Lock Control

214 230 112 122

POWER SOURCE

40A DOOR LOCK CB 1.25B FL MAIN

W

W

W

2

2

7 EB1

W

W

B

W

B

1

7.5A DOME

I2 50A MAIN

E7

2

W–L

W

W

W

I2

1

1

R

W I2

1

B

W 1

W

B

2

2

4

W–B 2

B

4

B

B

2

3

2

4

1

2

1

W–B 2

2

3

3

2

B–W

1

G

15A TAIL 1

20A DEFOG

B–Y 1

G

W–R 1

B

2

1

4

I8 IGNITION SW

B–W

STARTER RELAY

E7

8

IG1

3

ACC

2

1

IG2

B

2

1 TAIL RELAY

INJECTION RELAY B–O

E7

2 W

15A HAZ–RADIO

AM1

2

6 EB1 W–R

W–R 2

AM2

E7

7.5A AM2

B

G–W

W

BATTERY 3 EA2 1 EA1

W–B

1

1

E6

15A RAD CIG

B–Y 1

∗

P–L 1

The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.

9 2003 PRIUS (EWD493U)

B HOW TO USE THIS MANUAL K CONNECTOR LIST [A]

I14

I15

DARK GRAY

GRAY

1

1

2

I16

J1

J2

BLACK

2

A A

1 2

A A

A

A B B D D A A B CC CD D

A

6 7 8

[B]

J3

J4

K1

K2

L1

1 2

1 2

DARK GRAY A A A A A A A A

A B B DD A A B CC CDD

L2

L3

L4

M1

M2

1 2 3 4 5 6 7 8 9 101112

1 2 3 45 6 78

M3

1 2

1

1 2 3 4

2

M4

[D]

N1 GRAY

1 2 3

[C]

BLACK

GRAY 1

1

1 7

5

6

2 3 4 8 9 10

N2

O1

O2

GRAY

BLACK

DARK GRAY

1

1

1

2

[A] : Indicates connector to be connected to a part. (The numeral indicates the pin No.) [B] : Junction Connector Indicates a connector which is connected to a short terminal. Junction Connector

Junction connector in this manual include a short terminal which is connected to a number of wire harnesses. Always perform inspection with the short terminal installed. (When installing the wire harnesses, the harnesses can be connected to any position within the short terminal grouping. Accordingly, in other vehicles, the same position in the short terminal may be connected to a wire harness from a different part.) Wire harness sharing the same short terminal grouping have the same color. Same Color

Short Terminal

[C] : Parts Code The first letter of the code is taken from the first letter of part, and the numbers indicates its order in parts which start with the same letter. [D] : Connector Color Connectors not indicated are milky white in color.

10 2003 PRIUS (EWD493U)

B L PART NUMBER OF CONNECTORS Code

Part Name

Part Name

Part Number

Part Number

Code

90980–11070

D4

Diode (Door Courtesy Light)

90980–11608 90980–10962

A1

A/C Ambient Temp. Sensor

A2

A/C Condenser Fan Motor

90980–11237

D5

Diode (Key Off Operation)

A3

A/C Condenser Fan Relay

90980–10940

D6

Diode (Luggage Compartment Light)

90980–11608

D7

Door Lock Control Relay

90980–10848

ÁÁ ÁÁ A4

[A] A5

A/C Triple Pressure SW (A/C Dual and Single Pressure SW) A/T Oil Temp. Sensor

[B]

ÁÁ ÁÁ

90980–10943 D8

Door Courtesy Light LH

[C] 90980–11413

D9

Door Courtesy Light RH

90980–11148

A6

ABS Actuator

90980–11151

D10

Door Courtesy SW LH

A7

ABS Actuator

90980–11009

D11

Door Courtesy SW RH

A8

ABS Speed Sensor Front LH

90980–10941

D12

Door Courtesy SW Front LH

A9

ABS Speed Sensor Front RH

90980–11002

D13

Door Courtesy SW Front RH

A10

Airbag Sensor Front LH

D14

Door Courtesy SW Rear LH

A11

Airbag Sensor Front RH

A12

Auto Antenna Motor

90980–11097

90980–11856 D15

Door Courtesy SW Rear RH

90980–11194

D16

Door Key Lock and Unlock SW LH

90980–11194

D17

Door Key Lock and Unlock SW RH

90980–11156

90980–11170

[A] : Part Code [B] : Part Name [C] : Part Number Toyota Part Number are indicated. Not all of the above part numbers of the connector are established for the supply. In case of ordering a connector or terminal with wire, please confirm in advance if there is supply for it using “Parts Catalog News” (published by Parts Engineering Administration Dept.).

11 2003 PRIUS (EWD493U)

C TROUBLESHOOTING To Ignition SW IG Terminal

Fuse [A]

SW 1

Voltmeter [B]

VOLTAGE CHECK (a) Establish conditions in which voltage is present at the check point. Example: [A] – Ignition SW on [B] – Ignition SW and SW 1 on [C] – Ignition SW, SW 1 and Relay on (SW 2 off) (b) Using a voltmeter, connect the negative lead to a good ground point or negative battery terminal, and the positive lead to the connector or component terminal. This check can be done with a test light instead of a voltmeter.

Relay [C]

Solenoid

SW 2

CONTINUITY AND RESISTANCE CHECK (a) Disconnect the battery terminal or wire so there is no voltage between the check points. (b) Contact the two leads of an ohmmeter to each of the check points.

Ohmmeter

SW

If the circuit has diodes, reverse the two leads and check again. When contacting the negative lead to the diode positive side and the positive lead to the negative side, there should be continuity. When contacting the two leads in reverse, there should be no continuity.

Ohmmeter

Diode

(c) Use a volt/ohmmeter with high impedance (10 kΩ/V minimum) for troubleshooting of the electrical circuit. Digital Type

Analog Type

12 2003 PRIUS (EWD493U)

C To Ignition SW IG Terminal

Test Light

Fuse Case Short [A]

SW 1 Short [B] Disconnect Disconnect Light

(a) Remove the blown fuse and disconnect all loads of the fuse. (b) Connect a test light in place of the fuse. (c) Establish conditions in which the test light comes on. Example: [A] – Ignition SW on [B] – Ignition SW and SW 1 on [C] – Ignition SW, SW 1 and Relay on (Connect the Relay) and SW 2 off (or Disconnect SW 2) (d) Disconnect and reconnect the connectors while watching the test light. The short lies between the connector where the test light stays lit and the connector where the light goes out. (e) Find the exact location of the short by lightly shaking the problem wire along the body.

CAUTION:

Relay Short [C]

Disconnect SW 2

FINDING A SHORT CIRCUIT

(a) Do not open the cover or the case of the ECU unless absolutely necessary. (If the IC terminals are touched, the IC may be destroyed by static electricity.) (b) When replacing the internal mechanism (ECU part) of the digital meter, be careful that no part of your body or clothing comes in contact with the terminals of leads from the IC, etc. of the replacement part (spare part).

Solenoid

DISCONNECTION OF MALE AND FEMALE CONNECTORS To pull apart the connectors, pull on the connector itself, not the wire harness. HINT : Check to see what kind of connector you are disconnecting before pulling apart.

Pull Up

Pull Up

Press Down

Press Down

13 2003 PRIUS (EWD493U)

C TROUBLESHOOTING HOW TO REPLACE TERMINAL (with terminal retainer or secondary locking device)

Reference:

1. PREPARE THE SPECIAL TOOL

10 3

1

HINT : To remove the terminal from the connector, please construct and use the special tool or like object shown on the left. 2. DISCONNECT CONNECTOR

1 Example: (Case 1)

0.2 (mm)

Up

Tool

3. DISENGAGE THE SECONDARY LOCKING DEVICE OR TERMINAL RETAINER. (a) Locking device must be disengaged before the terminal locking clip can be released and the terminal removed from the connector. (b) Use a special tool or the terminal pick to unlock the secondary locking device or terminal retainer. NOTICE: Do not remove the terminal retainer from connector body.

Terminal Retainer

[A] Terminal Retainer

For Non–Waterproof Type Connector HINT : The needle insertion position varies according to the connector’s shape (number of terminals etc.), so check the position before inserting it.

[Retainer at Full Lock Position]

Stopper

”Case 1” Raise the terminal retainer up to the temporary lock position.

Terminal Retainer

[Retainer at Temporary Lock Position]

Example: (Case 2)

Secondary Locking Device

”Case 2” Open the secondary locking device.

14 2003 PRIUS (EWD493U)

C Tool Tab

Tab

Example: (Case 1)

[B]

Terminal Retainer

Tool [Male]

Access Hole ( Mark)

Tool

For Waterproof Type Connector HINT : Terminal retainer color is different according to connector body. Example: Terminal Retainer Black or White Black or White Gray or White

: Connector Body : Gray : Dark Gray : Black

[Female]

”Case 1” Type where terminal retainer is pulled up to the temporary lock position (Pull Type). Insert the special tool into the terminal retainer access hole (YMark) and pull the terminal retainer up to the temporary lock position. HINT : The needle insertion position varies according to the connector’s shape (Number of terminals etc.), so check the position before inserting it.

Retainer at Full Lock Position

Retainer at Temporary Lock Position [Male]

Example: (Case 2)

[Female]

”Case 2” Type which cannot be pulled as far as Power Lock insert the tool straight into the access hole of terminal retainer as shown.

Terminal Retainer

Tool

Tool

[Male]

Press Down

Press Down [Female]

15 2003 PRIUS (EWD493U)

C TROUBLESHOOTING Push the terminal retainer down to the temporary lock position.

Retainer at Full Lock Position

Retainer at Temporary Lock Position [Male]

[Female]

(c) Release the locking lug from terminal and pull the terminal out from rear.

Locking Lug

Tool

4. INSTALL TERMINAL TO CONNECTOR (a) Insert the terminal. HINT: 1. Make sure the terminal is positioned correctly. 2. Insert the terminal until the locking lug locks firmly. 3. Insert the terminal with terminal retainer in the temporary lock position.

(b) Push the secondary locking device or terminal retainer in to the full lock position. 5. CONNECT CONNECTOR

16 2003 PRIUS (EWD493U)

ABBREVIATIONS D ABBREVIATIONS The following abbreviations are used in this manual. ABS

=

Anti–Lock Brake System

A/C

=

Air Conditioning

COMB. =

Combination

DC

=

Direct Current

ECU

=

Electronic Control Unit

EMPS

=

Electric Motor Power Steering

ESA

=

Electronic Spark Advance

EVAP

=

Evaporative Emission

HV

=

Hybrid Vehicle

J/B

=

Junction Block

LH

=

Left–Hand

PTC

=

Positive Temperature Coefficient

R/B

=

Relay Block

RH

=

Right–Hand

SFI

=

Sequential Multiport Fuel Injection

SRS

=

Supplemental Restraint System

SW

=

Switch

TEMP.

=

Temperature

VSV

=

Vacuum Switching Valve

w/

=

With

w/o

=

Without

∗ The titles given inside the components are the names of the terminals (terminal codes) and are not treated as being abbreviations.

17 2003 PRIUS (EWD493U)

E GLOSSARY OF TERMS AND SYMBOLS GROUND The point at which wiring attaches to the Body, thereby providing a return path for an electrical circuit; without a ground, current cannot flow.

BATTERY Stores chemical energy and converts it into electrical energy. Provides DC current for the auto’s various electrical circuits. CAPACITOR (Condenser) A small holding unit for temporary storage of electrical voltage.

CIGARETTE LIGHTER An electric resistance heating element.

HEADLIGHTS Current flow causes a headlight 1. SINGLE filament to heat up and emit light. A FILAMENT headlight may have either a single (1) filament or a double (2) filament

2. DOUBLE FILAMENT

CIRCUIT BREAKER Basically a reusable fuse, a circuit breaker will heat and open if too much current flows through it. Some units automatically reset when cool, others must be manually reset.

HORN An electric device which sounds a loud audible signal.

DIODE A semiconductor which allows current flow in only one direction.

IGNITION COIL Converts low–voltage DC current into high–voltage ignition current for firing the spark plugs.

DIODE, ZENER

LIGHT Current flow through a filament causes the filament to heat up and emit light.

A diode which allows current flow in one direction but blocks reverse flow only up to a specific voltage. Above that potential, it passes the excess voltage. This acts as a simple voltage regulator.

PHOTODIODE The photodiode is a semiconductor which controls the current flow according to the amount of light.

LED (LIGHT EMITTING DIODE) Upon current flow, these diodes emit light without producing the heat of a comparable light.

DISTRIBUTOR, IIA Channels high–voltage current from the ignition coil to the individual spark plugs.

METER, ANALOG Current flow activates a magnetic coil which causes a needle to move, thereby providing a relative display against a background calibration.

FUSE

METER, DIGITAL Current flow activates one or many LED’s, LCD’s, or fluorescent displays, which provide a relative or digital display.

A thin metal strip which burns through when too much current flows through it, thereby stopping current flow and protecting a circuit from damage.

FUEL

FUSIBLE LINK (for Medium Current Fuse)

(for High Current Fuse or Fusible Link)

A heavy–gauge wire placed in high amperage circuits which burns through on overloads, thereby protecting the circuit. The numbers indicate the crosssection surface area of the wires.

M

18 2003 PRIUS (EWD493U)

MOTOR A power unit which converts electrical energy into mechanical energy, especially rotary motion.

E RELAY Basically, an electrically operated 1. NORMALLY switch which may be normally CLOSED closed (1) or open (2). Current flow through a small coil creates a magnetic field which either opens or closes an attached switch.

SPEAKER An electromechanical device which creates sound waves from current flow.

2. NORMALLY OPEN

SWITCH, MANUAL 1. NORMALLY OPEN

RELAY, DOUBLE THROW A relay which passes current through one set of contacts or the other.

Opens and closes circuits, i it thereby th b stopping (1) or allowing (2) current flow.

2. NORMALLY CLOSED

RESISTOR An electrical component with a fixed resistance, placed in a circuit to reduce voltage to a specific value.

SWITCH, DOUBLE THROW A switch which continuously passes current through one set of contacts or the other.

RESISTOR, TAPPED A resistor which supplies two or more different non adjustable resistance values.

SWITCH, IGNITION A key operated switch with several positions which allows various circuits, particularly the primary ignition circuit, to become operational.

RESISTOR, VARIABLE or RHEOSTAT A controllable resistor with a variable rate of resistance. Also called a potentiometer or rheostat. SENSOR (Thermistor) A resistor which varies its resistance with temperature.

SWITCH, WIPER PARK Automatically returns wipers to the stop position when the wiper switch is turned off.

SENSOR, SPEED Uses magnetic impulses to open and close a switch to create a signal for activation of other components.

TRANSISTOR A solidstate device typically used as an electronic relay; stops or passes current depending on the voltage applied at ”base”.

(Reed Switch Type)

SHORT PIN Used to provide an unbroken connection within a junction block.

SOLENOID An electromagnetic coil which forms a magnetic field when current flows, to move a plunger, etc.

WIRES Wires are always drawn as (1) NOT straight lines on wiring CONNECTED diagrams. Crossed wires (1) without a black dot at the junction are j nott joined; j i d crossed wires (2) with a black dot or octagonal ( ) (2) SPLICED mark at the junction are spliced (joined) connections.

19 2003 PRIUS (EWD493U)

F RELAY LOCATIONS [Engine Compartment]

[Instrument Panel]

20 2003 PRIUS (EWD493U)

F [Body]

21 2003 PRIUS (EWD493U)

F RELAY LOCATIONS Fusible Link Block No.1

Engine Compartment Left (See Page 20)

22 2003 PRIUS (EWD493U)

F Fusible Link Block No.2

2

: Engine Room R/B No.2

Luggage Room Left (See Page 21)

Right Side of Reserve Tank (See Page 20)

23 2003 PRIUS (EWD493U)

F RELAY LOCATIONS 3

: Engine Room R/B No.3

Engine Compartment Right (See Page 20)

24 2003 PRIUS (EWD493U)

MEMO

25 2003 PRIUS (EWD493U)

F RELAY LOCATIONS ,,, ,,, ,,,: Engine Room J/B

Engine Compartment Left (See Page 20)

26 2003 PRIUS (EWD493U)

F

27 2003 PRIUS (EWD493U)

F RELAY LOCATIONS [Engine Room J/B Inner Circuit]

28 2003 PRIUS (EWD493U)

F

29 2003 PRIUS (EWD493U)

F RELAY LOCATIONS ,,, ,,, ,,,: Instrument Panel J/B

Cowl Side Panel LH (See Page 20)

30 2003 PRIUS (EWD493U)

F

31 2003 PRIUS (EWD493U)

F RELAY LOCATIONS [Instrument Panel J/B Inner Circuit]

32 2003 PRIUS (EWD493U)

F

33 2003 PRIUS (EWD493U)

G ELECTRICAL WIRING ROUTING Position of Parts in Engine Compartment

A 1 A/C Condenser Fan Motor A 2 A/C Magnetic Clutch and Lock Sensor A 3 A/C Triple Pressure SW (A/C Dual and Single Pressure SW) A 4 ABS Speed Sensor Front LH A 5 ABS Speed Sensor Front RH A 6 Ambient Temp. Sensor B B B B

1 2 3 4

Brake Actuator Brake Actuator Brake Actuator Brake Fluid Level Warning SW

C C C C C C

1 2 3 4 5 6

Camshaft Position Sensor Camshaft Timing Oil Control Valve Circuit Breaker Sensor Converter Converter Crankshaft Position Sensor

F 1 F 2 F 3 F 4 F 5 F 6 F 7 F 8 F 9 F 10 F 11 F 12 F 13

Front Airbag Sensor LH Front Airbag Sensor RH Front Parking Light LH Front Parking Light RH Front Side Marker Light LH Front Side Marker Light RH Front Turn Signal Light LH Front Turn Signal Light RH Front Wiper Motor Fusible Link Block No.1 Fusible Link Block No.1 Fusible Link Block No.1 Fusible Link Block No.1

H H H H H H

Headlight LH Headlight RH Heated Oxygen Sensor (Bank 1 Sensor1) Horn Hydraulic Booster Hydraulic Booster

1 2 3 4 5 6

D 1 DC Motor E 1 Engine Coolant Temp. Sensor E 2 Engine Hood Courtesy SW

34 2003 PRIUS (EWD493U)

G Position of Parts in Engine Compartment

I I I I I I I I I I I I I I

1 2 3 4 5 6 7 8 9 10 11 12 13 14

Ignition Coil and Igniter No.1 Ignition Coil and Igniter No.2 Ignition Coil and Igniter No.3 Ignition Coil and Igniter No.4 Injector No.1 Injector No.2 Injector No.3 Injector No.4 Inverter Inverter Inverter Inverter Inverter Inverter

N 1 Noise Filter (Ignition) O 1 Oil Pressure SW R 1 Radiator Fan Motor S 1 Steering Shaft Torque Sensor T 1 Theft Deterrent Horn T 2 Throttle Control Motor T 3 Throttle Position Sensor V 1 Vacuum Sensor (HC Adsorber and Catalyst System) V 2 VSV (EVAP) V 3 VSV (HC Adsorber and Catalyst System)

K 1 Knock Sensor M M M M

1 2 3 4

Mass Air Flow Meter Motor Generator No.1 Motor Generator No.2 Motor Generator No.2

W W W W

1 2 3 4

Washer Motor Water Pump Motor (A/C) Water Pump Motor (Inverter) Water Temp. SW

35 2003 PRIUS (EWD493U)

G ELECTRICAL WIRING ROUTING Position of Parts in Instrument Panel

A 7 A 8 A 9 A 10 A 11 A 12 A 13 A 14 A 15 A 16 A 17 A 18 A 19 A 20 A 21 A 22

A/C Amplifier A/C Amplifier A/C Amplifier A/C Room Temp. Sensor A/C Solar Sensor A/C Thermistor Accel Position Sensor Air Inlet Control Servo Motor Air Mix Control Servo Motor Air Vent Mode Control Servo Motor Airbag Sensor Assembly Airbag Sensor Assembly Airbag Sensor Assembly Airbag Squib (Front Passenger Airbag Assembly) Airbag Squib (Steering Wheel Pad) Ashtray Illumination

B 5 B 6 B 7 B 8 B 9 B 10 B 11 B 12 B 13 B 14

Back–Up Light Relay Blower Motor Blower Motor Linear Controller Body ECU Body ECU Brake ECU Brake ECU Brake ECU Brake ECU Brake Warning Buzzer

C 7 C 8 C10 C 11 C12 C13 C14

Center Cluster SW Cigarette Lighter Combination Meter Combination Meter Combination SW Combination SW Combination SW

D D D D

Data Link Connector 3 Daytime Running Light Relay Diode (Door Courtesy) Diode (Daytime Running Light)

2 3 4 5

E 3 E 4 E 5 E 6 E 7 E 8 E 9 E 10

EMPS ECU EMPS ECU EMPS ECU EMPS ECU Engine Control Module Engine Control Module Engine Control Module Engine Control Module

36 2003 PRIUS (EWD493U)

G Position of Parts in Instrument Panel

G 1 Gateway ECU H 7 H 8 H 9 H10 H 11 H12 H13 H14

Hazard Warning SW Hazard Warning SW Heated Oxygen Sensor (Bank 1 Sensor 2) Hybrid Vehicle Control ECU Hybrid Vehicle Control ECU Hybrid Vehicle Control ECU Hybrid Vehicle Control ECU Hybrid Vehicle Control ECU

I 15 Ignition SW J 1 J 2 J 3 J 4 J 5 J 6 J 7 J 8 J 9 J 10 J 11 J 12 J 13 J 14 J 15 J 16 J 17 J 18 J 19 J 20 J 21

Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector

J 22 J 23 J 24 J 25 J 26 J 27 J 28 J 29

Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector Junction Connector

L 1 Light Control Rheostat M 5 Multi Display M 6 Multi Display M 7 Multi Display P P P P

1 2 3 4

Park/Neutral Position SW Parking Brake SW PTC Heater PTC Heater

R R R R

2 3 4 5

Radio and Player Radio and Player Radio and Player Remote Control Mirror SW

S 2 Shift Lock ECU S 3 Stop Light SW T 4 Transponder Key Computer T 5 Turn Signal Flasher Relay U 1 Unlock Warning SW and Key Interlock Solenoid W 5 Wireless Door Control Receiver

37 2003 PRIUS (EWD493U)

G ELECTRICAL WIRING ROUTING Position of Parts in Body

F 14 F 15 F 16 F 17 F 18

A 23 ABS Speed Sensor Rear LH A 24 ABS Speed Sensor Rear RH B 15 B 16 B 17 B 18 B 19 B 20 B 21

Battery Blower Motor Battery Blower Motor Controller Battery ECU Battery ECU Battery Fan Relay Buckle SW and Tension Reducer LH Buckle SW RH and Seat Belt Warning Occupant Detection Sensor B 22 Battery Input Relay D 6 D 7 D 8 D 9 D10 D 11

Front Door Speaker LH Front Door Speaker RH Fuel Pump and Fuel Sender Fusible Link Block No.2 Fusible Link Block No.2

H15 High Mounted Stop Light H16 Hybrid Vehicle Battery H17 Hybrid Vehicle Battery I 16 Interior Light I 17 Interlock SW

Door Courtesy SW Front LH Door Courtesy SW Front RH Door Courtesy SW Rear LH Door Courtesy SW Rear RH Door Lock Control SW Front RH Door Lock Motor and Door Unlock Detection SW Rear LH D12 Door Lock Motor and Door Unlock Detection SW Rear RH D13 Door Lock Motor, Door Key Lock and Unlock SW and Door Unlock Detection SW Front LH D14 Door Lock Motor, Door Key Lock and Unlock SW and Door Unlock Detection SW Front RH

J 30 J 31 J 32 J 33

Junction Connector Junction Connector Junction Connector Junction Connector

L L L L L

License Plate Light LH License Plate Light RH Luggage Compartment Door Unlock SW Luggage Compartment Light Luggage Compartment Light SW

2 3 4 5 6

38 2003 PRIUS (EWD493U)

G Position of Parts in Body

N 2 Navigation ECU N 3 Navigation ECU N 4 Noise Filter (Rear Window Defogger) P 5 P 6 P 7 P 8 P 9 P 10 P 11 P 12 P 13 P 14 P 15

Personal Light Power Window Control SW Front RH Power Window Control SW Rear LH Power Window Control SW Rear RH Power Window Master SW Power Window Motor Front LH Power Window Motor Front RH Power Window Motor Rear LH Power Window Motor Rear RH Pretensioner LH Pretensioner RH

R 6 R 7 R 8 R 9 R10 R 11

Rear Combination Light LH Rear Combination Light RH Rear Speaker LH Rear Speaker RH Remote Control Mirror LH Remote Control Mirror RH

S 4 S 5 S 6 S 7 S 8 S 9 S 10 S 11 S 12

Side Airbag Sensor LH Side Airbag Sensor RH Side Airbag Squib LH Side Airbag Squib RH System Main Relay System Main Relay System Main Relay System Main Relay System Main Relay

T 6 Tension Reducer Solenoid V 4 Vapor Pressure Sensor V 5 VSV (Canister Closed Valve) V 6 VSV (Parge Flow Switching Valve)

39 2003 PRIUS (EWD493U)

G ELECTRICAL WIRING ROUTING : Location of Connector Joining Wire Harness and Wire Harness : Location of Ground Points

: Location of Splice Points

40 2003 PRIUS (EWD493U)

G Connector Joining Wire Harness and Wire Harness EA1

DARK GRAY

1

1

Code

Joining Wire Harness and Wire Harness (Connector Location)

EA1

Engine Wire and Engine No.4 Wire (Near the Radiator Fan)

41 2003 PRIUS (EWD493U)

G ELECTRICAL WIRING ROUTING : Location of Connector Joining Wire Harness and Wire Harness

: Location of Ground Points

42 2003 PRIUS (EWD493U)

G Connector Joining Wire Harness and Wire Harness

Code IA1 IA2

Joining Wire Harness and Wire Harness (Connector Location) Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)

IB1

Floor Wire and Cowl Wire (Cowl Side Panel LH)

IC1

Front Door LH Wire and Cowl Wire (Left Kick Panel)

ID1 ID2 IE1 IF1 IF2

Instrument Panel Wire and Cowl Wire (Left Kick Panel) Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel) Instrument Panel Wire and Floor Wire (Left Kick Panel)

IG1

Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)

IH1

Floor Wire and Engine Room Main Wire (Left Kick Panel)

43 2003 PRIUS (EWD493U)

G ELECTRICAL WIRING ROUTING : Location of Connector Joining Wire Harness and Wire Harness

: Location of Splice Points

44 2003 PRIUS (EWD493U)

G Connector Joining Wire Harness and Wire Harness

Code II1 IJ1 IJ2

Joining Wire Harness and Wire Harness (Connector Location) Instrument Panel Wire and A/C Sub Wire (Instrument Panel Brace LH) Floor No.3 No 3 Wire and Instrument Panel Wire (Under the Instrument Panel Center)

IK1

Engine Wire and Engine Room Main Wire (Right Kick Panel)

IL1

Instrument Panel Wire and Engine Room Main Wire (Right Kick Panel)

IM1

Engine Room Main Wire and Cowl Wire (Right Kick Panel)

IN1

Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)

IO1

Engine Wire and Cowl Wire (Right Kick Panel)

IP1

Instrument Panel Wire and Cowl Wire (Right Kick Panel)

IQ1

Front Door RH Wire and Cowl Wire (Right Kick Panel)

45 2003 PRIUS (EWD493U)

G ELECTRICAL WIRING ROUTING : Location of Connector Joining Wire Harness and Wire Harness : Location of Ground Points

: Location of Splice Points

46 2003 PRIUS (EWD493U)

G Connector Joining Wire Harness and Wire Harness BA1

BB1

GRAY

1 2 3 4 5 6 7 8 9 10

5 4 3 2 1 10 9 8 7 6

1 2 3 4 5 6 7 8 9 10

5 4 3 2 1 10 9 8 7 6

BC1

1 2 3 4 5 6 7 8

4

3

2

1

8

7

6

5

Code

Joining Wire Harness and Wire Harness (Connector Location)

BA1

Rear Door No.2 Wire and Floor Wire (Center Pillar LH)

BB1

Rear Door No.1 Wire and Cowl Wire (Center Pillar RH)

BC1

Cowl Wire and Fuel Tank Wire (Near the Fuel Tank)

47 2003 PRIUS (EWD493U)

MEMO

48 2003 PRIUS (EWD493U)

SYSTEM CIRCUITS H

2003 PRIUS ELECTRICAL WIRING DIAGRAM SYSTEM CIRCUITS ABS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AIR CONDITIONING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BACK–UP LIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CIGARETTE LIGHTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . COMBINATION METER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DOOR LOCK CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ELECTRIC TENSION REDUCER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . EMPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ENGINE CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GATEWAY SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HEADLIGHT (w/ DAYTIME RUNNING LIGHT) . . . . . . . . . . . . . . . . . . . . . . . . . . . HEADLIGHT (w/o DAYTIME RUNNING LIGHT) . . . . . . . . . . . . . . . . . . . . . . . . . . HORN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HYBRID VEHICLE IMMOBILISER SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ILLUMINATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INTERIOR LIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . KEY REMINDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LIGHT AUTO TURN OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LIGHT REMINDER BUZZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MULTIPLEX COMMUNICATION SYSTEM (COMMUNICAION BUS) . . . . . . . . NAVIGATION SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . POWER SOURCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . POWER WINDOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RADIATOR FAN AND CONDENSER FAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RADIO AND PLAYER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . REAR WINDOW DEFOGGER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . REMOTE CONTROL MIRROR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SEAT BELT WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SHIFT LOCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . STOP LIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TAILLIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . THEFT DETERRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TOYOTA HYBRID SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ∗ CHARGING ∗ CRUISE CONTROL ∗ REGENERATIVE BRAKE TURN SIGNAL AND HAZARD WARNING LIGHT . . . . . . . . . . . . . . . . . . . . . . . . WIPER AND WASHER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . WIRELESS DOOR LOCK CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Page 172 188 102 122 182 134 162 164 68 160 80 84 124 78 92 108 114 104 114 112 156 50 126 186 152 180 130 118 132 167 100 88 146 54 108 108 108 96 120 140

49 2003 PRIUS (EWD493U)

POWER SOURCE

W 50A HTR

TO CONVERTER

1

2

30A RDI 1

2

30A CDS FAN 3 1B

W

40A ABS NO. 1 1

2

3

W–R

W

W

W

W

3

50A EMPS 1 1 B

2

3

1 A

B–R

50A HTR3

1 D

F12 C , F13 D

100A DC/DC

G

3

W–R

1 2G

2 2C

15A EFI

B

2

9 1J

10A HORN

FUSIBLE LINK BLOCK NO. 1

F10 A , F11 B

1

15A AM2

2 1B

30A HTR2 1

2

3

G–W

10A TURN–HAZ

15A DOME

30A HTR1 1

1 C

2

3

B–R 15A THRO

B

B

B–G

10A ABS NO. 4 2

1

3

10A BATT FAN

L

30A ABS NO. 2 1

20A HV

1 1B

1 B

5A DC/DC–S

2

20A ABS NO. 3

SHORT PIN

2 A

1

2 HEAD RELAY

(*1) B–R

1 120A MAIN

SHORT PIN 2

4

1

2

4

3 10A HEAD LO (RH)

F17 A , F18 B

TO CONVERTER

(*2)

FUSIBLE LINK BLOCK NO. 2

1

(*1)

30A HEAD

SHORT PIN 5

(* 2)

1

10A HEAD LO (LH)

(*2) 1

10A HEAD HI (LH)

3

BATTERY 4

10A HEAD HI (RH)

2 DIM RELAY 7. 5A DRL

11 1J

R

3

50 2003 PRIUS (EWD493U)

1

2

3

R–L

W–R

W

W

1 2H

1

* 1 : W/O DAYTIME RUNNING LIGHT * 2 : W/ DAYTIME RUNNING LIGHT

2

30A POWER

10A SRS ACC

30A DOOR

40A DEF W–G

3 2B

5A AM1

15A CIG

ACC RELAY I15 IGNITION SW ACC 3 P–L 2 AM1

8 2C

5

3

1

2

7 AM2

2

15A STOP

20A PWR1

IG1 4 B–Y IG1 RELAY

ST1

W–R

10A ACC

1

IG2 6 B–W

6 2D

5

3

1

2

10A HTR 7. 5A ECU–B

10A GAUGE 7. 5A OBDI I

ST2 8 R–W 30A WIPER

5A ECU–IG

15A WASHER

TAIL RELAY 5

3

1

2

5A PANEL

7. 5A TAIL

10A HEAD (RH)

10A HEAD (LH)

51 2003 PRIUS (EWD493U)

POWER SOURCE SERVICE HINTS HEAD RELAY 2–1 : Closed with the light control SW at HEAD position or the dimmer SW at FLASH position Closed with the engine running and the parking brake pedal released (Parking brake SW off) [w/ Daytime running light] TAIL RELAY 5–3 : Closed with the light control SW at TAIL or HEAD position I15 IGNITION SW 2–3 : Closed with the ignition key at ACC or ON position 2–4 : Closed with the ignition key at ON or ST position 7–6 : Closed with the ignition key at ON or ST position 7–8 : Closed with the ignition key at ST position : PARTS LOCATION Code F10

See Page

Code

See Page

A

34

F13

D

34

F11

B

34

F17

A

38

F12

C

34

F18

B

38

Code I15

: RELAY BLOCKS Code 3

See Page

Relay Blocks (Relay Block Location) Engine Room R/B No.3 (Engine Compartment Right)

24

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 1B 1J

See Page

Junction Block and Wire Harness (Connector Location)

27

Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

30

Instrument Panel Wire and Instrument Panel J/B (Cowl ( Side Panel LH))

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

2B 2C 2D 2G 2H

52 2003 PRIUS (EWD493U)

See Page 37

MEMO

53 2003 PRIUS (EWD493U)

TOYOTA HYBRID SYSTEM

H10 C , H11 A , H12 B , H13 E , H14 D HYBRID VEHICLE CONTROL ECU ST2

STP

CCS 16 D

1 D

GND1 31 D

GND2 24 D

IG2 6

B–W

ST2 8

R–W

W–R

B–W

9 1J

3 1J

C A

3

B–W

11 2G

C A

15A AM2

W–B

L

6 ID1 5

W–B

L

B B B–W

1 2G

J24 A , J25 B

5 2B

I15 IGNITION SW

JUNCTION CONNECTOR

2 2C

B–W

4

FROM STOP LIGHT SW

W–R

7 AM2

S3 STOP LIGHT SW

B–W

G–W

R–W

2 D

B–Y

ST1–

7 E

B–W

IGSW

6 E

1 B–W

IG2 RELAY

5 3

2

CCS CRUISE

2 1A

2 1B

3 1K W–B

B–W

RES/ACC

1

ECC 4

C14 CRUISE CONTROL SW [COMB. SW]

B–G

W–B

1 D

M

CANCEL

W–B

FUSIBLE LINK BLOCK NO. 1

2

W–B

F12 C , F13 D

W–B

1 C

SET/COAST

W3 WATER PUMP MOTOR (INVERTER)

B–W

B

14 IK1

A B

C B

C B

120A MAIN

1

J18 A , J19 B

F18 FUSIBLE LINK BLOCK NO. 2

JUNCTION CONNECTOR A A

A A

B A

W–B

W–B W–B W–B

BATTERY J17 JUNCTION CONNECTOR

A A

IG

54 2003 PRIUS (EWD493U)

W–B

* 1 : SHIELDED

H10 C , H11 A , H12 B , H13 E , H14 D HYBRID VEHICLE CONTROL ECU D

B

R

15 D

22 D

15 E

13 E

23 E

22 E

14 E

12 E

11 E

21 E

L

B

W

R

L–R

L–W

L–B

LG–R

R–B

W

B

R

VCP2

EP2

VSFT

SFT

EOM

GSFT

5 E

W–B

N

23 D

J21 JUNCTION CONNECTOR

P

12 D

G

VPA1

VPA2

14 D

Y

VCP1

EP1

13 D

E

E

W–B

(*1)

(* 1)

W–B

I4

GSFT

E 1

P1 PARK/NEUTRAL POSITION SW

E A E A

W–B

W–B

A13 ACCEL POSITION SENSOR

D B

W–B

3

SFT

W–B

8

R

B

9 VSFT

W–B

R

J22 A , J23 B

4 B

JUNCTION CONNECTOR

7 D

B

6 N

W

5 P

R–B

2

LG–R

1 EP2

L–B

2 VPA2

L–W

L–R

4 VCP2

W

3 EP1

L

5 VPA1

G

6 VCP1

Y

R

I2

A B J24 A , J25 B JUNCTION CONNECTOR A A

A A

W–B

W–B

8 2D

W–B

W–B

8 2K

W–B

W–B

W–B

W–B

J11 JUNCTION CONNECTOR

A

ID

55 2003 PRIUS (EWD493U)

TOYOTA HYBRID SYSTEM

H10 C , H11 A , H12 B , H13 E , H14 D HYBRID VEHICLE CONTROL ECU MSN 13 C R

MSNG 20 C G

GMT 1 C B–R

GMTG 8 C G–W

GCSG 12 C BR

GCS 5 C Y

W

GRFG 17 C

B

GRF 10 C

(* 1)

R

GSN 4 C

G

GSNG 11 C

(* 1)

(* 1)

(* 1)

W–B

I8

(* 1)

G

R

B

W

Y

BR

G–W

B–R

G

R

W–B

I8

7 A

2 A

1 A

6 A

3 A

8 A

9 A

4 A

5 B

2 B

GSN

GRF

GRFG

GCS

GCSG

GMTG

GMT

MSNG

MSN

W–B

GSNG

3 1K

M2 A MOTOR GENERATOR NO. 1

M3 B , M4 C MOTOR GENERATOR NO. 2

W–B

W–B

W–B

1 1A

B A

B A

B A J8 A ,

J9 B

C B

C B

W–B

W–B

JUNCTION CONNECTOR

W–B W–B W–B W–B

W–B

W–B

W–B

56 2003 PRIUS (EWD493U)

* 1 : SHIELDED

H10 C , H11 A , H12 B , H13 E , H14 D HYBRID VEHICLE CONTROL ECU GO 10 B

G

6 D

O

SPDO

8 D

R–Y

ESTP

29 D

BR

HTE–

19 D

Y

HTE+

27 D

L

ETH–

28 D

P

ETH+

(* 1)

GR

MMT 2 C

R–W

MMTG 9 C

W

MRFG 18 C

B

MRF 19 C

(*1)

L

MCSG 21 C

P

MCS 14 C

9

IA2

R–Y

O

G

SPHV

GO

MPX2

J18 A JUNCTION CONNECTOR

11 MPD2

B A W–B

MPD1

MPX+

GR MPX+

GR–B A7 A/C AMPLIFIER

GR–B 4

MPX–

15

4

MP2+

16 B8 BODY ECU

B A B A M3 B , M4 C MOTOR GENERATOR NO. 2

ESTP

13 D

G1 GATEWAY ECU

MMT

21 C

GR–L

1 C

MMTG

10 C

14 D

(* 1)

3 C

MRFG

16 C

HTE–

MPX1

W–B

4 B

18 C

HTE+

ENGINE CONTROL MODULE

(* 1)

MRF

GR

1 B

MCSG

R–W

6 B

W

B

L

P MCS

19 C

E 9 C , E10 D

I8

3 B

ETH–

BR

27 C

Y

L

28 C ETH+

(* 1)

(* 1)

P

(* 1)

(* 1)

W–B

I8

GR

11

GR–B GR

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B A

J17 JUNCTION CONNECTOR

IG

57 2003 PRIUS (EWD493U)

TOYOTA HYBRID SYSTEM

H10 C , H11 A , H12 B , H13 E , H14 D HYBRID VEHICLE CONTROL ECU GIWA 28 A R

GIWB 18 A G

GIVB 8 A W

GIVA 19 A B

R

MIWA 25 A

Y

VB 20 A

G

MIWB 17 A

W

MIVB 7 A

(*1)

(* 1)

(* 1)

G

MIVA 16 A B

MIVG 26 A B

MVU 5 A W

MUU 4 A R

MWU 6 A G

MIT 11 A L

MSDN 13 A Y

MSIV 21 A

R

W

B

B

W

G

Y

R

B

W

G

R

4 D M–SDOWN

G

7 C M–SINV

L

Y

G

(* 1)

5 D

3 D

1 D

2 D

6 D

1 C

3 C

4 C

5 C

2 C

1 B

3 B

4 B

2 B

M–INVT M–WU

M–UU

M–VU M–GINV M–IVA I9 D ,

I10 C ,

M–IVB

M–IWB

I11 A ,

I12 B ,

VB I13 E ,

M–IWA

G–IVA

G–IVB

G–IWB G–IWA

I14 F

INVERTER GND

(*1)

(*1) A

A

A

A

A

W–B

W–B

W–B

W–B

(*1)

A

J7 JUNCTION CONNECTOR

GR–B

GR–B

GR

GR

W–B

(*1)

A

W–B

A

W–B

6 B

W–B W–B W–B A

J1 JUNCTION CONNECTOR A

IE

W–B

EC

58 2003 PRIUS (EWD493U)

* 1 : SHIELDED * 2 : HIGH VOLTAGE (273. 6V)

H10 C , H11 A , H12 B , H13 E , H14 D HYBRID VEHICLE CONTROL ECU

1

5A DC/DC–S

100A DC/DC

12 IA1

2

1

I9

W–G

L–O

IF1

13

IA1

W–G

W–G

W

B–R

W–G

2

V–R

I17 INTERLOCK SW

+B2 5 D

W–G

O

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

O

10

+B1 4 D W–G

B

NODD 4 B

G

ILK 4 E

F17 FUSIBLE LINK BLOCK NO. 2 W–G

GFIV 24 A

B

GSIV 15 A

B

MFIV 14 A

F10 FUSIBLE LINK BLOCK NO. 1

GIVG 27 A

R

GUU 1 A

W

GVU 2 A

G

GWU 3 A

L

G1T 23 A

Y

GSDN 12 A

(* 1)

G–UU G–GINV

I 9 D , I10 C ,

I11 A ,

8 C

7 B

8 B

6 C

4 A

M–FINV

G–SINV

G–FINV

CVRSW

NODD

I12 B ,

I13 E ,

B–R

6 A

L–O

1 A

G–VU

2 IH1

V–R

B

2 A

B

R

3 A

G

W

5 A

G–INVT G–WU

B

G

4 A G–SDOWN

L

Y

4 IH1

3 A

1 B AMD

S

1 A IGCT

C4 A , C5 B

I14 F

CONVERTER

INVERTER IGCT

IDH 2 A

5 B

Y

(*2)

O

1 E (*2)

O

1 F

CBI

W–G

CEI

IE1 Y

14

O(* 2) O(* 2) GR–B

GR

GR

Y

GR–B

IDH

10 A7 A/C AMPLIFIER

59 2003 PRIUS (EWD493U)

TOYOTA HYBRID SYSTEM

H10 C , H11 A , H12 B , H13 E , H14 D HYBRID VEHICLE CONTROL ECU SPDI

V–W

25 D

B–L

1B

26 D

R–W

GB

8 B

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

10A GAUGE

15A DOME G A 7 1J

G B

V–W

J27 A , J28 B

L–Y

5 2A

IE1 V–W

19

W–G

JUNCTION CONNECTOR

W–G

C10 A , C11 B COMBINATION METER

14 A

2 B

3 B

L

GR–B

GR

10

IB1

6 IB1

B–L

W–R

1 IH1

R–W

13 A

CHARGE

21 A

W–G

6 2A

CRUISE

4 2A

OUTPUT CONTROL

7 2B

L

22 A

2 2G

L

L

I9

O(*2)

O(* 2)

O(*2)

O(* 2)

GR–B GR

L

W–B

W–R

R–W

B–L

7 2A

2 A

17 A

16 A

6 2B

IH

W–B

W–B

BR

22 A GND

IGCT

B17 A , B18 B

BJ

BATTERY ECU

60 2003 PRIUS (EWD493U)

GB

IB01

* 1 : SHIELDED * 2 : HIGH VOLTAGE (273. 6V)

H10 C , H11 A , H12 B , H13 E , H14 D HYBRID VEHICLE CONTROL ECU CON1

CON2

CON3

GR

8 IH1

9 IH1

GR

1 E

P

V

2 B

V

13 B

(*1)

G

DTH– 18 E

R

11

IF1

P

DTH+ 19 E

B

HTD– 20 E

W

HTD+ 2 E

5 A

1 A

1 B

1 C

7 A

2 A

6 A

Y–R

4 A

Y–B

3 A

Y

IF2

O(*2)

5

O(*2)

IF2

W–B

3

SYSTEM MAIN RELAY

IF2

(* 1)

4

G

IF2

R

2

B

IF2

W

1

S 8 A , S 9 B , S10 C

W–G

S11 D , S12 E

W–G

1 D

1 E

O(* 2) O(* 2) B2

B B

B B

C A

J32 A , J33 B

C A

W–B

W–B

JUNCTION CONNECTOR

W–B

C A

W–B

W–B

W–B

W–B

O(*2) O(*2)

W

B

R

G

Y

Y–B

Y–R

W–B

6 A

7 A

18 A

19 A

4 B

10 B

3 B

HTB+

HTB–

BTH+

BTH–

IB

V–

V+

B17 A , B18 B BATTERY ECU

61 2003 PRIUS (EWD493U)

TOYOTA HYBRID SYSTEM

H10 C , H11 A , H12 B , H13 E , H14 D HYBRID VEHICLE CONTROL ECU

G

R

16

14

22

HVI+

2

HVI–

SIL

10 E

10 D

21 D W–L

V

24

TC

9 E

C

E J16 JUNCTION CONNECTOR

C

HVO+

HVO–

B11 BRAKE ECU 10 ID1

E W–L

LG

1

HAI

HAO

9 D

P–B

WFSE

BTH– 17 D

P–B

BTH+ 18 D

Y–R

HTB– 30 D

G–R

C3 CIRCUIT BREAKER SENSOR G–R BR–B

20 D

Y

HTB+

AS1 15 B

P

AS1G 14 B

2 ID1

1 ID1 W–G W

P–B

W–G

W

E J26 JUNCTION CONNECTOR

W

Y

Y–R

P–B

15

12

8

13

WFSE

OP2

OP3

W

P

E D2 DATA LINK CONNECTOR 3

7

TC

SIL

O(*2) O(*2)

W–B

O H16 A , H17 B HYBRID VEHICLE BATTERY

1 A

(*2)

W–B

O

W–B

(*2)

W–B

1 B

SERVICE PLUG O

O

(* 2)

(*2)

L

L

B

B

W

6

L–B

18

W

5

R

17

G–W

L–W

4

L–R

Y–B

16

G

P

3

P–L

LG

15

Y

L–O

2

VBB1 VBB2 VBB3 VBB4 VBB5 VBB6 VBB7 VBB8 VBB9VBB10

LG–R

LG–B

14

SENSOR

L

O

BUSBER MODULE

GR

BUSBER MODULE

V–Y

HYBRID VEHICLE BATTERY

GR–B

HYBRID VEHICLE BATTERY

7

20

8

21

9

22

10

23

11

24

1

2

3

4

5

VBB11 VBB13 VBB15 VBB17 VBB19 VBB12 VBB14 VBB16 VBB18 GBB19

B17 A , B18 B BATTERY ECU

62 2003 PRIUS (EWD493U)

TB1 GB1 TB2 GB2 TB3

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

* 2 : HIGH VOLTAGE (273. 6V)

H10 C , H11 A , H12 B , H13 E , H14 D HYBRID VEHICLE CONTROL ECU

7 B

3 D G–Y

7 D

11 1F G–Y

IA1

7 G–Y

8 HEVC

T4 TRANSPONDER KEY COMPUTER

A18 AIRBAG SENSOR ASSEMBLY

GSW2

8 1J

O

B–W

L

4 23

10A BATT FAN

L–R

3 E

20A HV

MREL

BATT

FCVC

LG–R

W–G

IH1

L–R

ABFS

G–Y

2

B15 BATTERY BLOWER MOTOR

5

W–B

G–Y

IF1

5

L

M 2 L–B

W–B

2

1

L–B

W–B

3

L

L

IGCT RELAY 2 2

W 3

B A

2 3

G–Y

B A

J3 B

C B

J2 A ,

B B

JUNCTION CONNECTOR

A A

G–Y

A A JUNCTION CONNECTOR

J22 A , J23 B

W

2 1

1

W–B

W

B19 BATTERY FAN RELAY

W

L

W–G

H16 A , H17 B

SENSOR

3

5

4

B16 BATTERY MOTOR BLOWER CONTROLLER 2

6

1

GR

LG–R

L–R

L–B

1 A

5 A

10 A

9 A

3 A

8 B

9 B

2 B

W–B

Y–B

8 A

A

SIL

AM

CCTL

EQCO

EQTR

SW1

FCTL1

SI

VM B A

J32 A

A

B A

A

W–B

GB3 TB4 GB4 TB5 GB5

V–W

10

Y

9

G

G

R 8

G–Y

7

W 6

R

W

W–B

1

3

JUNCTION CONNECTOR J1 J7 JUNCTION JUNCTION CONNECTOR CONNECTOR W–B W–B

5 IH1

L–B

2

L

L

4

B22 BATTERY INPUT RELAY

W–B

W

G–Y

HYBRID VEHICLE BATTERY

B17 A , B18 B

BI

BATTERY ECU

IE

63 2003 PRIUS (EWD493U)

TOYOTA HYBRID SYSTEM SYSTEM OUTLINE FEATURES OF TOYOTA HYBRID SYSTEM This system controls the following modes in order to achieve the most efficient operations to match the driving conditions. (1) Supply of electrical power from the HV battery to motor generator no.2 provides force to drive the wheels. (2) While the tires are driven by the engine via the planetary gears, motor generator no.1 is driven via the planetary gears to supply electricity to motor generator no.2 to drive the wheels. (3) When the vehicle is decelerating, kinetic energy from the wheels is recovered and converted into electrical energy and used to recharge the HV battery by means of motor generator no.2. The hybrid vehicle control ECU switches between these modes (1, 2, 1+2, or 3) according to the driving conditions. However, when the state of charge of the HV battery is low, the HV battery is charged by the engine by turning motor generator no.1. CRUISE CONTROL OPERATION Cruise control is the speed control device, which sets the desired speed by just operating the switch on the control panel without pressing the accelerator pedal. This device is used when you would like to drive the vehicle at the fixed speed. 1. SET CONTROL If you operate the SET/COAST switch when driving (The available range of set speed: between about 40 and 200 km/h) with the main switch is ON (When power indicator comes on), the device memorizes vehicle’s speed when switch is off and controls the fixed speed. 2. SET SPEED CONTROL This device compares the vehicle’s running speed and the memorized speed, and controls the driving power of the motor and the engine by calculating the cruise control requirements so that both speed become equivalent. 3. COAST CONTROL If the SET/COAST switch is continued to be ON during the running with the cruise control, the device recognizes the cruise control requirement is at 0 and decelerates the vehicle’s speed. Then the device memorizes the speed when the switch is off in order to control the fixed speed. In each time you operate SET/COAST switch momentarily (For about 0.5 second), the memorized speed is decreased in about 1.5 km/h. However, in case of the tap–down operation with more than 5–km/h gap between the memorized speed and vehicle’s running speed, the device memorizes the vehicle’s speed when the switch is off and controls the fixed speed. 4. ACCEL CONTROL If the RESUME/ACCEL switch is continued to be ON during the running with the cruise control, the device recognizes the cruise control is on the acceleration side and accelerates the vehicle’s speed. Then the running speed when the switch is off is memorized to control the fixed speed. In each time you operate RESUME/ACCEL switch momentarily (For about 0.5 second), the memorized speed is increased in about 1.5 km/h. However, if there is more than 5–km/h gap between the memorized speed and vehicle’s running speed, this operation does not change the memorized speed. (Tap–up operation is not available.) 5. RESUME CONTROL If the running speed is faster than the low speed limit after the cruise control is canceled manually, the fixed speed is controlled by the OFF–ON operation of RESUME/ACCEL switch, so that the vehicle’s speed returns to the memorized speed at the time the cruise control is released.

64 2003 PRIUS (EWD493U)

6. MANUAL CANCEL CONTROL When each of the following signals is input during driving with cruise control, the cruise control is released with turning the cruise control requirement to 0. (The memorized speed is maintained when following signals except the signal, main switch OFF is input.) ∗ Stop light switch ON (Pressing the brake pedal) ∗ Control switch’s cancel switch ON ∗ Main switch OFF 7. AUTO CANCEL FUNCTION A) The memorized speed is erased and the control is canceled if the following conditions occur. The power indicator blinks at that time until the main switch is turned ON. The speed control is unavailable unless the main switch is turned ON again. ∗ When the stop light switch breaks or short–circuits. ∗ When sudden change of the running speed signal occur. B) The memorized speed is erased and the control is canceled if the following conditions occur. ∗ When the malfunction of the stop light switch input circuit occurs. ∗ When the running speed becomes slower than 40km/h. ∗ When the running speed becomes slower than the speed that 16 km/h subtracted from the memorized speed. 8. REGENERATIVE SYSTEM OPERATION This system operates the motor as a generator to change the kinetic energy of the vehicle into the electricity when accel pedal release or foot braking controls the vehicle, and store the electricity in the battery. SERVICE HINTS C14 CRUISE CONTROL SW [COMB. SW] 5–4 : Approx. 1540 Ω with CANCEL SW on Approx. 240 Ω with RES/ACC SW on Approx. 630 Ω with SET/COAST SW on : PARTS LOCATION Code

See Page

Code

A7

36

A13

36

H10

A18

36

H11

B8

36

B11

See Page

G1

Code

See Page

37

J18

A

37

C

37

J19

A

37

B

37

H12

B

37

J22

A

37

36

H13

E

37

J23

B

37

B15

38

H14

D

37

J24

A

37

B16

38

H16

A

38

J25

B

37

J21

37

B17

A

38

H17

B

38

J26

B18

B

38

I9

D

35

J27

A

37 37

B19

38

I10

C

35

J28

B

37

B22

38

I11

A

35

J32

A

38

C3

34

I12

B

35

J33

B

38

C4

A

34

I13

E

35

M2

A

35

C5

B

34

I14

F

35

M3

B

35

C10

A

36

I15

37

M4

C

35

C11

B

36

I17

38

36

D2

36

J2

A

37

S8

A

39

J3

B

37

S9

B

39

37

S10

C

39

C

36

E10

D

36

F10

37

37

C14 E9

J1

P1

J7

S3

37

34

J8

A

37

S11

D

39

J9

B

37

S12

E

39

F12

D

34

F13

C

34

J11

37

T4

37

F17

38

J16

37

W3

35

F18

38

J17

37

65 2003 PRIUS (EWD493U)

TOYOTA HYBRID SYSTEM : RELAY BLOCKS Code 2

See Page 23

Relay Blocks (Relay Block Location) Engine Room R/B No.2 (Right Side of Reserve Tank)

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 1A

See Page

Junction Block and Wire Harness (Connector Location)

27

Engine Wire and Engine Room J/B (Engine Compartment Left)

27

Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

2G

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

2K

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

1B 1F 1J 1K 2A 2B 2C 2D

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code IA1 IA2

See Page

Joining Wire Harness and Wire Harness (Connector Location)

42

Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)

IB1

42

Floor Wire and Cowl Wire (Cowl Side Panel LH)

ID1

42

Instrument Panel Wire and Cowl Wire (Left Kick Panel)

IE1

42

Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)

42

Instrument Panel Wire and Floor Wire (Left Kick Panel)

IH1

42

Floor Wire and Engine Room Main Wire (Left Kick Panel)

IK1

44

Engine Wire and Engine Room Main Wire (Right Kick Panel)

IF1 IF2

: GROUND POINTS Code EC

See Page

Ground Points Location

40

Engine Compartment Left

42

Cowl Side Panel LH

IG

42

Cowl Side Panel RH

IH

42

Right Kick Panel

BI

46

Left Side of Rear Pillar

BJ

46

Right Side of Rear Pillar

ID IE

: SPLICE POINTS Code

See Page

Wire Harness with Splice Points

Code

See Page

Wire Harness with Splice Points

E5

40

Engine Room Main Wire

I8

44

Engine Wire

I2

44

Instrument Panel Wire

I9

44

Engine Room Main Wire

I4

44

Cowl Wire

B2

46

Floor Wire

66 2003 PRIUS (EWD493U)

MEMO

67 2003 PRIUS (EWD493U)

ENGINE CONTROL

B B–W

B–W 7 AM2

B–W

B–W

IG2 6

W–B

ST2

B–W

W–R

FROM POWER SOURCE SYSTEM (SEE PAGE 50) I15 IGNITION SW

15A EFI

1 2G

11 2G

B–W

2

B–W

5 2B

W–R

2 2C

5 EFI RELAY

3 1J

3

2

B–R

G–R

1 1F 10 1A

13 1F

3 1A B

12 1F

3 1K

4 1A

R–W G–R

4

IA2

14

IA1

G–R

W–B

FUSIBLE LINK BLOCK NO. 1

F12 C , F13 D

1

2

B 1 C

5

CIR OPN RELAY

3

2 1B

3

1

IG2 RELAY

15A AM2

1

B

5

2 1A

G–R

9 1J

IE

BL

J5 B

B B

IA1

B

W–B

W–B

B

J4 A ,

A B

7

19

A

IG

68 2003 PRIUS (EWD493U)

B

J17 JUNCTION CONNECTOR

W–B

A

8 BC1

B

M

JUNCTION CONNECTOR

A

W–B

W–B J1 JUNCTION CONNECTOR

BATTERY

A

C A

3

W–B

A

C A F16 FUEL PUMP

A

J18 JUNCTION CONNECTOR

J7 JUNCTION CONNECTOR

F18 FUSIBLE LINK BLOCK NO. 2

1 120A MAIN

B

B–R

B–G

1 D

EA

B

I7

4 B 29 A

G–R

B

I7 B–R I7

12 A

IGT2

EVP1

22 B THA

1

2

B

I7 VG

4 3

1 B–R I7

10 B 19 B

B

B

2003 PRIUS (EWD493U) B–R

13 A

IGT3

Y

W–B 4 4

3 2

EVG

14 B THW

G–R 2 2

BR

I7

B–W E4

14 A

1

1

IGT4

I5 INJECTOR NO. 1

B–W

W–B

1 I4 IGNITION COIL AND IGNITER NO. 4

B–W

I3 IGNITION COIL AND IGNITER NO. 3

B–W 1

B–R

2

B–R

W–B I2 IGNITION COIL AND IGNITER NO. 2

B–W

E3

Y

3

G

2

W–B E4

O1 OIL PRESSURE SW

+B 4

B–W

Y–B

IGF 1

E4

E1 ENGINE COOLANT TEMP. SENSOR

25 A

E3

W

I7 3

B–R

2

(*1)

IGT1 W–B

R

3 I1 IGNITION COIL AND IGNITER NO. 1

W–B

4

B–W

BR

BR

11 A E3

G

MREL 1

E4

(*1)

9 D B–W

W

B–R

W–B

R–B

FC B–W

W–B

B

B–R

Y–G

E4

M1 MASS AIR FLOW METER

25 C

R–L

IGSW

V2 VSV (EVAP)

9 B

B

BATT JUNCTION CONNECTOR

B–W

B–W

B

B

3 B J24 A , J25 B

B B

G–R

B–W

C A

G–R

R–W

B B

B–W

B–W

W–B

2

5 B #10

ENGINE CONTROL MODULE E 7 A , E 8 B , E 9 C , E10 D

12 B

MOPS

5 1

BR

B

B

* 1 : SHIELDED

(* 1)

69

ENGINE CONTROL

B

B B–W A B

B

B 1 BC1

B–R

L–W

R–W

B–R

1

B 2

1

2 BC1

# 30

# 40

L

2 A

1 A

# 20

1

2

7 A

8 A

6 BC1

B–R 6 B

T2 THROTTLE CONTROL MOTOR

(* 1)

2

L

2

5 BC1

V6 VSV (PARGE FLOW SWITCHING VALVE)

2

I8 INJECTOR NO. 4

2

1

I7 INJECTOR NO. 3

1

I6 INJECTOR NO. 2

1

N1 NOISE FILTER (IGNITION)

1

B

B–W

B–W

B–W

C A

L

A B

P

E4

V5 VSV (CANISTER CLOSED VALVE)

B–W

E4

J12 A , J13 B

B–W

E4

JUNCTION CONNECTOR

B–W

B

11 C

13 C

TBP

CCV

M–

M+

30 A GE01

E 7 A , E 8 B , E 9 C , E10 D ENGINE CONTROL MODULE HCLS

VC

PTNK

2 B

VTA 23 B

22 C

VTA2 21 B

BR

I7

1

BR

E2

L

1

2

3

VC

VTA1

VTA2

E2 4 BR

BR

2 PTNK

P

Y–R

L–R VC

4 BC1

L–R

Y–R

Y–R

J9 B

3

7 BC1

BR

Y–R

B B

C A

J8 A ,

3

BR

1

VC

C A

3 BC1

JUNCTION CONNECTOR

E2

C A

7 IO1

15 IO1 Y–R

2 HCLS

V1 VACUUM SENSOR (HC ADSORBER AND CATALYST SYSTEM)

V–W

9 IO1

BR

T3 THROTTLE POSITION SENSOR

Y–R

Y–R

(*1)

V–W

14 C

V4 VAPOR PRESSURE SENSOR

BR

BR

I7

BR

I7

BR

B

B

B

B

(* 1)

(* 1) (* 1)

70 2003 PRIUS (EWD493U)

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

* 1 : SHIELDED

J14 A , J15 B

E A

H12 B , H14 D

G–W

D B

HYBRID VEHICLE CONTROL ECU

1 D

JUNCTION CONNECTOR

G–W

15A STOP

STP

ESTP 8 D R–Y

ETH1 27 D L

1 G–W

P

Y

BR

ETH+ 28 D

(* 1)

Y–R

W–G

G

(* 1)

V–W

23 A

24 A

21 C

OCV+

HTE+ 19 D

IA2

5 D SPD

HTE– 29 D

O

G 9

4 A FAN

SPDO 6 D

(* 1)

1

C2 CAMSHAFT TIMING OIL CONTROL VALVE

TO COMBINATION METER

2

GO 10 B

LG

FROM FAN NO. 1 AND FAN NO. 2 RELAY

W–G

2

S3 STOP LIGHT SW

R–B

9 2K

OCV–

(* 1)

10 C

18 C

SPHV

GO

HTE–

19 C

28 C

HTE+

ETH+

27 C

16 C

ETH–

ESTP

E 7 A , E 8 B , E 9 C , E10 D ENGINE CONTROL MODULE

IE1

22 IE1

HT1B

BR

7 D

I6

I6

(*1)

2

OX1B 11 D

BR

1 IE1

E11 16 D (* 1)

W

OX1A 12 D

P–L

HT1A 1 D

B–W

HCC 20 C

BR

E2 18 B

BR B

I7

1

3

HT1A

OX1A

E1 4

IK1

D A

4 E1

Y

G–Y

1

(*1)

W

P–L

IK1

3

1

OX1B

HT1B

+B 2

+B 2

H9 HEATED OXYGEN SENSOR (BANK 1 SENSOR 2)

I7

6

B

BR

H3 HEATED OXYGEN SENSOR (BANK 1 SENSOR 1)

BR

1

7 IK1

E B

BR

E B

J22 A , J23 B

E B

2

JUNCTION CONNECTOR

BR

(* 1)

W

P–L

V3 VSV (HC ADSORBER AND CATALYST SYSTEM) B B–W

6 IO1

B

12

B

IE1

B

(* 1)

(* 1)

(* 1)

(* 1)

71 2003 PRIUS (EWD493U)

ENGINE CONTROL FROM POWER SOURCE SYSTEM (SEE PAGE 50)

15A THRO

P–B 8 1A

W–L

C

E

G–R GR–L

C

E

P–G

P–B

W–L

GR

5

G–R

4

GR–L

J16 JUNCTION CONNECTOR

ACT

LG

NE

P–B

A8 A/C AMPLIFIER

GR

W–G

TO AMBIENT TEMP. SENSOR

GR

W–L

(* 1)

(* 1)

(* 1)

(* 1)

23 C TAM

6 A

3 D

+BM

NEO

22 D

6 C

ACT

8 C

TC

6 D

SIL

14 D

W

13 D

MPX1

MPX2

E 7 A , E 8 B , E 9 C , E10 D ENGINE CONTROL MODULE E03

ME01

W–B W–B

9 A

W–B

3 A

W–B

R

G

(* 1)

I7

E02 31 A

R

B

(* 1)

(* 1)

E01 21 A

W–B

E1 17 B

W–B

NE+ 16 B

W–B

NE– 24 B

W–B

G2 10 A

BR

KNK1 28 A

I7

1 (* 1) (* 1)

I7

BR

BR

BR

(* 1) BR

2

I7

A A

A A

A A

A A

G

C6 CRANKSHAFT POSITION SENSOR

G

1

(* 1)

1

C1 CAMSHAFT POSITION SENSOR G

K1 KNOCK SENSOR

B

G

1 EA1

2

J8 A ,

J9 B

JUNCTION CONNECTOR

A B

A B

(*1)

A A

BR

(* 1) (* 1)

EB

72 2003 PRIUS (EWD493U)

EA

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

* 1 : SHIELDED

10A GAUGE

7. 5A OBDI I

P–B 5 2A

9 2D

1

ID1

2 ID1

L

W–L

W–L

G–R

J26 JUNCTION CONNECTOR

P–B

W–L

G–R

D

11

7

13

16

4 B

MPD2

SIL

GR–B

15

E

W

MPX+ (* 1)

A A

D

GR–L

MPX– (* 1)

B8 BODY ECU

16

E

J26 JUNCTION CONNECTOR

P–B J22 A

A A

JUNCTION CONNECTOR

W

GR

W–L

GR–L

MPD1 4

A A 14 ID2

MPX+

8 2D

BR

3 B

2 B

14 A

L

MP2+

W–B

JUNCTION CONNECTOR

11 GR

A7 A/C AMPLIFIER

W–B

MALFUNCTION INDICATOR LAMP

GR–B

A A

J24 A 4

SG 5

GR

B

CG 4 W–B

D2 DATA LINK CONNECTOR 3

J18 B JUNCTION CONNECTOR

22 A

BAT

BR

G1 GATEWAY ECU

TC

GR–B

8 2K W–B

7 2A

A

IG

J17 JUNCTION CONNECTOR

J11 JUNCTION CONNECTOR

A

ID

EB

BR

14 IO1

BR

W–B

BR

6 2B

W–B

B

(*1)

(*1)

C10 A , C11 B COMBINATION METER

IH

73 2003 PRIUS (EWD493U)

ENGINE CONTROL SYSTEM OUTLINE This system utilizes an engine control module and maintains overall control of the engine, transmission and so on. An outline of the engine control is explained here. 1. INPUT SIGNALS (1) Engine coolant temp. signal circuit The engine coolant temp. sensor detects the engine coolant temp. and has a built–in thermistor with a resistance which varies according to the engine coolant temp. thus the engine coolant temp. is input in the form of a control signal into TERMINAL THW of the engine control module. (2) Intake air temp. signal circuit The intake air temp. sensor is installed in the mass air flow meter and detects the intake air temp., which is input as a control signal into TERMINAL THA of the engine control module. (3) Oxygen sensor signal circuit The oxygen density in the exhaust gases is detected and input as a control signal into TERMINALS OX1A and OX1B of the engine control module. (4) RPM signal circuit Camshaft position and crankshaft position are detected by the camshaft position sensor and crankshaft position sensor. Camshaft position is input as a control signal to TERMINAL G2 of the engine control module, and engine RPM is input into TERMINAL NE+. (5) Throttle signal circuit The throttle position sensor detects the throttle valve opening angle, which is input as a control signal into TERMINALS VTA and VTA2 of the engine control module. (6) Vehicle speed signal circuit The vehicle speed signal from combination meter, detects the vehicle speed and inputs a control signal into TERMINAL SPD of the engine control module via the combination meter. (7) Battery signal circuit Voltage is constantly applied to TERMINAL BATT of the engine control module. When the ignition SW is turned on, the voltage for engine control module start–up power supply is applied to TERMINAL +B of the engine control module via EFI relay. (8) Engine knock signal circuit Engine knocking is detected by knock sensor and the signal is input into TERMINAL KNK1 of the engine control module as a control signal. 2. CONTROL SYSTEM ∗ SFI system The SFI system monitors the engine condition through the signals, which are input from each sensor to the engine control module. The best fuel injection volume is decided based on this data and the program memorized by the engine control module, and the control signal is output to TERMINALS #10, #20, #30 and #40 of the engine control module to operate the injector. (Inject the fuel). The SFI system produces control of fuel injection operation by the engine control module in response to the driving conditions. ∗ ESA system The ESA system monitors the engine condition through the signals, which are input to the engine control module from each sensor. The best ignition timing is detected according to this data and the memorized data in the engine control module, and the control signal is output to TERMINALS IGT1, IGT2, IGT3 and IGT4. This signal controls the ignition coil and igniter to provide the best ignition timing for the driving conditions. ∗ Fuel pump control system The engine control module operation outputs to TERMINAL FC and controls the CIR OPN relay. Thus controls the fuel pump drive speed in response to conditions. 3. DIAGNOSIS SYSTEM With the diagnosis system, when there is a malfunctioning in the engine control module signal system, the malfunction system is recorded in the memory. The malfunctioning system can then be found by reading the display (Code) of the malfunction indicator lamp. 4. FAIL–SAFE SYSTEM When a malfunction occurs in any system, if there is a possibility of engine trouble being caused by continued control based on the signals from that system, the fail–safe system either controls the system by using data (Standard values) recorded in the engine control module memory or else stops the engine.

74 2003 PRIUS (EWD493U)

SERVICE HINTS E7 (A), E8 (B), E9 (C), E10 (D) ENGINE CONTROL MODULE BATT–E1 : Always approx. 9–14 volts +B–E1 : 9–14 volts with the ignition SW on and the engine stopping VC–E2 : 4.5–5.5 volts with the ignition SW on and the engine stopping IGF–E1 : Pulse generation with the engine idling THA–E2 : 0.5–3.4 volts with the engine idling and the intake air temp. 20°C (68°F) THW–E2 : 0.2–1.0 volts with the engine idling and the engine coolant temp. 80°C (176°F) W–E1 : 9–14 volts with the engine idling : 0–3 volts with the ignition SW on and the engine coolant temp. sensor connector disconnects ESTP–E1 : 9–14 volts with the brake pedal depressed FC–E01 : 9–14 volts with the ignition SW on and the engine stopping : 0–3 volts with the engine idling +BM–E1 : Always approx. 9–14 volts MREL–E1 : 9–14 volts with the ignition SW on and the engine stopping EVP1–E1 : 9–14 volts with the ignition SW on and the engine stopping HT1A, HT1B : 9–14 volts with the ignition SW on and the engine stopping TC–E1 : 9–14 volts with the ignition SW on and the engine stopping KNK1–E2 : Pulse generation with the engine idling NE+, G2–NE– : Pulse generation with the engine idling OCV+ –OCV– : Pulse generation with the ignition SW on and the engine stopping IGT1, IGT2, IGT3, IGT4–E1 : Pulse generation with the engine idling #10, #20, #30, #40–E01 : Pulse generation with the engine idling E01, E02, E03, E1, E2, ME01–GROUND : Always continuity E1 ENGINE COOLANT TEMP. SENSOR 2–1 : Approx. 14.96 kΩ (–20 °C, –4 °F) Approx. 2.44 kΩ (20 °C, 68 °F) Approx. 0.31 kΩ (80 °C, 176 °F) Approx. 0.14 kΩ (110 °C, 230 °F) : PARTS LOCATION Code

See Page

Code H14

See Page D

Code

See Page

A7

36

J17

A8

36

I1

35

B8

36

I2

35

J22

A

37

C1

34

I3

35

J23

B

37

C2

34

I4

35

J24

A

37

C6

34

I5

35

J25

B

37

37

37

J18

37

C10

A

36

I6

35

J26

37

C11

B

36

I7

35

K1

35

D2

36

I8

35

M1

35

E1

34

I15

37

N1

35

J1

37

O1

35

E7

A

36

E8

B

36

J4

A

37

S3

37

E9

C

36

J5

B

37

T2

35

E10

D

36

37

T3

35

F12

C

34

J8

A

37

V1

35

F13

D

34

J9

B

37

V2

35

37

V3

35

H12

J7

F16

38

F18

38

J12

A

37

V4

39

G1

37

J13

B

37

V5

39

H3

34

J14

A

37

V6

39

H9

37

J15

B

37

B

37

J11

J16

37

75 2003 PRIUS (EWD493U)

ENGINE CONTROL

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 1A

See Page

Junction Block and Wire Harness (Connector Location)

27

Engine Wire and Engine Room J/B (Engine Compartment Left)

27

Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

2G

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

2K

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

1B 1F 1J 1K 2A 2B 2C 2D

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code EA1

See Page

Joining Wire Harness and Wire Harness (Connector Location)

40

Engine Wire and Engine No.4 Wire (Near the Radiator Fan)

42

Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)

42

Instrument Panel Wire and Cowl Wire (Left Kick Panel)

IE1

42

Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)

IK1

44

Engine Wire and Engine Room Main Wire (Right Kick Panel)

IO1

44

Engine Wire and Cowl Wire (Right Kick Panel)

BC1

46

Cowl Wire and Fuel Tank Wire (Near the Fuel Tank)

IA1 IA2 ID1 ID2

: GROUND POINTS Code EA

See Page

Ground Points Location

40

Engine Block

42

Cowl Side Panel LH

IG

42

Cowl Side Panel RH

IH

42

Right Kick Panel

BL

46

Near the Fuel Tank

EB ID IE

: SPLICE POINTS Code E3 E4

See Page 40

Wire Harness with Splice Points Engine Wire

Code

See Page

Wire Harness with Splice Points

I6

44

Instrument Panel Wire

I7

44

Engine Wire

76 2003 PRIUS (EWD493U)

MEMO

77 2003 PRIUS (EWD493U)

HYBRID VEHICLE IMMOBILISER SYSTEM FROM POWER SOURCE SYSTEM (SEE PAGE 50)

7 AM2

7. 5A ECU–B

IG2 6

B–W

W–R

ST2

5 2C

F A

C A 1 2G

H14 HYBRID VEHICLE CONTROL ECU

D2 DATA LINK CONNECTOR 3

OP1

R–G

W–R

B–W

H B

J27 A , J28 B

J24 A JUNCTION CONNECTOR

JUNCTION CONNECTOR

C A

2 2C

R–G

I15 IGNITION SW

FCVC

11

7

B–R

8 ID1

11 ID2

A

B–W

10 ID2

J20 JUNCTION CONNECTOR

15A AM2

B–W

R–G

9 1J

R–G

B–R

A

2 1B 2

3

1 +B

8 D

HEVC

L–B

12 W–B

R–W

GND T4 TRANSPONDER KEY COMPUTER

A W–B

ID2

J10 JUNCTION CONNECTOR

LG–B

D A

W–B

F B

J12 A , J13 B

A 8 2K

9 ID1

8 2D

J24 A , J25 B

JUNCTION CONNECTOR

W–B W–B

A B

W–B

2

A A

W–B

1

L–B

R–W

B A

J27 A , J28 B

IB1

U1 UNLOCK WARNING SW

3

JUNCTION CONNECTOR

L–B

R–W

D B

D6 DOOR COURTESY SW FRONT LH

BR

JUNCTION CONNECTOR

A A

J27 A , J28 B

E B

LG–B

7 B

R3 B , R4 C

8 C

RADIO AND PLAYER

BR

F18 FUSIBLE LINK BLOCK NO. 2

7

C7 CENTER CLUSTER SW

B–G

4

BATTERY

KSW

JUNCTION CONNECTOR

8 6

120A MAIN

CTY 6

LG–B

1 D

1

IND 5 LG–B

F12 C , F13 D

1 C

FUSIBLE LINK BLOCK NO. 1

B

IG

A

A

1 ID

IF

78 2003 PRIUS (EWD493U)

J11 JUNCTION CONNECTOR

SERVICE HINTS T4 TRANSPONDER KEY COMPUTER 1–GROUND : Always approx. 12 volts 12–GROUND : Always continuity U1 UNLOCK WARNING SW 1–2 : Closed with the ignition key in cylinder : PARTS LOCATION Code

See Page

Code

See Page

Code

See Page

C7

36

I15

37

J25

B

37

D2

36

J10

37

J27

A

37

D6

38

J11

37

J28

B

37

A

37

R3

B

37

B

37

R4

C

37

F12 F13

C

34

J12

D

34

J13

F18

38

H14

37

J20 J24

A

37

T4

37

37

U1

37

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 1B

See Page

Junction Block and Wire Harness (Connector Location)

27

Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

2G

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

2K

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

1J 2C 2D

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code IB1 ID1 ID2

See Page

Joining Wire Harness and Wire Harness (Connector Location)

42

Floor Wire and Cowl Wire (Cowl Side Panel LH)

42

Instrument Panel Wire and Cowl Wire (Left Kick Panel)

: GROUND POINTS Code

See Page

Ground Points Location

ID

42

Cowl Side Panel LH

IF

42

Left Kick Panel

79 2003 PRIUS (EWD493U)

HEADLIGHT (w/ DAYTIME RUNNING LIGHT) FROM POWER SOURCE SYSTEM (SEE PAGE 50) 1

1

2

1

2

2

3 1

5

DRL RELAY

7. 5A DRL

30A HEAD

3 3

3

3

3

4 HEAD RELAY

R–L

R–W

W–B

R–G 2

3

4

DIM RELAY 1

3

2 8 1F

2 1E

5 1E

R–W

G–R

R–G

6 IA2

R–G

L

17 IA2

L

9 IA1

R–B

R–G

10A HEAD HI (RH)

7 1F

R–Y

10A HEAD HI (LH)

6 1F

R

10A HEAD LO (LH)

10A HEAD LO (RH)

3 1E

R–B

R–G

R–B

E2

3

3

H2 HEADLIGHT RH 1

2

1

R–Y

R–W

R

W–B

2 G–R

H1 HEADLIGHT LH

A J1 JUNCTION CONNECTOR IE

80 2003 PRIUS (EWD493U)

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

7. 5A ECU–B

10A GAUGE

5 2C

IA2 H B

A R–W

L–Y

R–G

16

8 ID1

JUNCTION CONNECTOR

J27 A , J28 B

R–G

F A

7 1J

R–L

R–G

R–W

10 2K

15A DOME

C J20 JUNCTION CONNECTOR

R–G

A

C

R–G

R–L

R–G

3

12

L

CHG–

IND

E

9

2

5

7 2I

2 2G

10 2A

4 2A

J20 JUNCTION CONNECTOR

LIGHT CONTROL SW

OFF

LOW

E A

7

TAIL

R

RDY

L FLASH

9 A

Y–B

13

16

7 2A

C13 COMBINATION SW W–B

H 17 B

14

HIGH

W–B

HRLY

R–W

BODY ECU

21

1

HEAD

B8 A , B9 B 2 B

17

P2 PARKING BRAKE SW

R–W

3 ID2

DIMMER SW

8

7 ID2

6 2B

A J11 JUNCTION CONNECTOR

J17 JUNCTION CONNECTOR

5 ID2 R IG

ID

BR

R–G

E

E B

C10 COMBINATION METER

R–G

HIGH BEAM

E

Y–B

E

J12 A , J13 B

E

R–Y

R–G

JUNCTION CONNECTOR

R–G

R–B

L

11

L–Y

PKB

8

R–G

HI

7

W–B

H

1

IG

Y–B

DRL

2

+B

HEAD

H–LP

L

DIM

R–Y

D5 DIODE (DAYTIME RUNNING LIGHT)

6

L–O

1

D3 DAYTIME RUNNING LIGHT RELAY

4

IH

81 2003 PRIUS (EWD493U)

HEADLIGHT (w/ DAYTIME RUNNING LIGHT) SYSTEM OUTLINE When the ignition SW is turned on ST position and ”READY” signal from engine control module is sent to the daytime running light relay via body ECU. If the parking brake pedal is depressed (Parking brake SW is on) at that time, the daytime running light system does not operate. If the parking brake pedal is released (Parking brake SW is off), the daytime running light system operates and the low beam headlight comes on. SERVICE HINTS HEAD RELAY 1–2 : Closed with the light control SW at HEAD position or the dimmer SW at FLASH position Closed with the engine running and the parking brake lever is released (Parking brake SW off) D3 DAYTIME RUNNING LIGHT RELAY 12–GROUND : Approx. 12 volts with the ignition SW at ON position 3–GROUND : Always approx. 12 volts 11–GROUND : Continuity with the parking brake pedal dipressed 2–GROUND : Always continuity 8–GROUND : Continuity with the dimmer SW at HIGH or FLASH position : PARTS LOCATION Code

See Page

Code

See Page

Code

See Page

B8

A

36

H1

34

J17

B9

B

36

H2

34

J20

C10

36

J1

37

J27

A

37

C13

36

J11

37

J28

B

37

D3

36

J12

A

37

D5

36

J13

B

37

P2

: RELAY BLOCKS Code 3

See Page

Relay Blocks (Relay Block Location) Engine Room R/B No.3 (Engine Compartment Right)

24

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code

See Page

Junction Block and Wire Harness (Connector Location)

1E 1F

27

Engine g Room Main Wire and Engine g Room J/B (Engine ( g Compartment Left))

30

Instrument Panel Wire and Instrument Panel J/B (Cowl ( Side Panel LH))

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

1J 2A 2B 2C 2G 2I 2K

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code IA1 IA2 ID1 ID2

See Page

Joining Wire Harness and Wire Harness (Connector Location)

42

Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)

42

Instrument Panel Wire and Cowl Wire (Left Kick Panel)

: GROUND POINTS Code ID

See Page

Ground Points Location

42

Cowl Side Panel LH

IG

42

Cowl Side Panel RH

IH

42

Right Kick Panel

IE

82 2003 PRIUS (EWD493U)

37 37

37

: SPLICE POINTS Code E2

See Page 40

Wire Harness with Splice Points

Code

See Page

Wire Harness with Splice Points

Engine Room Main Wire

83 2003 PRIUS (EWD493U)

HEADLIGHT (w/o DAYTIME RUNNING LIGHT)

4

1

1

SHORT PIN

HEAD RELAY 3

2

1 1B

8 1F

4

6 1F

R–L

R–G

H2 HEADLIGHT RH

J20 JUNCTION CONNECTOR

E

2

1

2

R–G

1

R–Y

R–W

JUNCTION CONNECTOR R–Y

R–W

J4 A ,

3 ID2

1 C

F A

E B J5 B

J5 B

F A

D B

E A

E A

J4 A ,

R–W

E

R–G

R–Y

E

2 B9 BODY ECU

FUSIBLE LINK BLOCK NO. 1

F12 C , F13 D

3

H1 HEADLIGHT LH

JUNCTION CONNECTOR

B

7 1F

3

IA2

R–W

6

10A HEAD (RH)

10A HEAD (LH)

R–W

1

SHORT PIN

R–G

2

8

HRLY

IA1

3

IA1

H 17

1 D L R–G

R

R–Y B–G

R–G

17

OFF TAIL HEAD

JUNCTION CONNECTOR

R–G

7

F A

D B R–G

R–Y

8

J12 A , J13 B

R–W

13

LOW 7 2I

HIGH FLASH

10 2A

16

L

C13 COMBINATION SW

W–B

DIMMER SW

LIGHT CONTROL SW

120A MAIN

F18 FUSIBLE LINK BLOCK NO. 2

BATTERY

R

5 ID2 1

A J17 JUNCTION CONNECTOR IG

84 2003 PRIUS (EWD493U)

F A

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

15A DOME

L–Y

7 1J

2 2G

4 2A

L

L

L

C10 COMBINATION METER

21 HEAD

HIGH BEAM

17

L

14

7 2A

BR

6 2B

IH

85 2003 PRIUS (EWD493U)

HEADLIGHT (w/o DAYTIME RUNNING LIGHT) SERVICE HINTS HEAD RELAY 1–2 : Closed with the light control SW at HEAD position or the dimmer SW at FLASH position C13 COMBINATION SW 13–16 : Continuity with the light control SW at HEAD position 8–16 : Continuity with the dimmer SW at FLASH position 7–16 : Continuity with the dimmer SW at HIGH or FLASH position : PARTS LOCATION Code

See Page

Code

See Page

Code

See Page

B9

36

F18

38

J12

C10

36

H1

34

J13

C13

36

H2

34

J17

37

J20

37

F12

C

34

J4

A

37

F13

D

34

J5

B

37

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code

See Page

Junction Block and Wire Harness (Connector Location)

1B 1F

27

Engine g Room Main Wire and Engine g Room J/B (Engine ( g Compartment Left))

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

2G

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

2I

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

1J 2A 2B

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code IA1 IA2 ID2

See Page

Joining Wire Harness and Wire Harness (Connector Location)

42

Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)

42

Instrument Panel Wire and Cowl Wire (Left Kick Panel)

: GROUND POINTS Code

See Page

Ground Points Location

IG

42

Cowl Side Panel RH

IH

42

Right Kick Panel

86 2003 PRIUS (EWD493U)

A

37

B

37

MEMO

87 2003 PRIUS (EWD493U)

TAILLIGHT

1

5 7. 5A TAIL

TAIL RELAY

6 2K

7 2J

5 2F

G

LG

1 2H

3

2 ID2

10

5 2L

G

G

2

IA1 J4 A ,

J5 B G

W

LG

JUNCTION CONNECTOR D F A B

11 TRLY

T

D A

B9 BODY ECU

F B

G

G F6 FRONT SIDE MARKER LIGHT RH W–B

2

B–G

1

14 OFF

1

1

2

2

TAIL E1

HEAD

W–B

16 W–B

C13 LIGHT CONTROL SW [COMB. SW]

120A MAIN

F18 FUSIBLE LINK BLOCK NO. 2

F3 FRONT PARKING LIGHT LH W–B

LG–R

F5 FRONT SIDE MARKER LIGHT LH W–B

6 ID2

1 D

1

G

100A DC/DC

F11 B , F13 D

FUSIBLE LINK BLOCK NO. 1

1 B

F4 FRONT PARKING LIGHT RH W–B

LG–R

G

18

A

W–B

J7 JUNCTION CONNECTOR A

W–B

BATTERY

A

A J17 JUNCTION CONNECTOR

IG

J1 JUNCTION CONNECTOR IE

88 2003 PRIUS (EWD493U)

E1

W–B

E1

2

1

W–B

1

2

B A

BI

G

1 6

5

C B C B 1

2

2003 PRIUS (EWD493U) G

A A

G

R7 TAILLIGHT RH [REAR COMB. LIGHT RH]

G

A A

L3 LICENSE PLATE LIGHT RH

A A

G

A A

G

R6 TAILLIGHT LH [REAR COMB. LIGHT LH]

G

JUNCTION CONNECTOR

W–B

W–B

W–B

A A

W–B

L2 LICENSE PLATE LIGHT LH

G

G

J32 A , J33 B

A B

A A

1 6

5

JUNCTION CONNECTOR

J32 A , J33 B

W–B

BK

89

TAILLIGHT SERVICE HINTS TAIL RELAY 5–3 : Closed with the light control SW at TAIL or HEAD position : PARTS LOCATION Code

See Page

Code

36

C13

36

F3

34

F4

34

J4

A

F5

34

J5

B

F6

34 34

F11

B

F13

See Page

B9

D

Code

34

J32

F18

38

J33

J1

37

See Page A

38

B

38

L2

38

37

L3

38

37

R6

39

J7

37

R7

39

J17

37

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 2F 2H 2J 2K 2L

See Page

Junction Block and Wire Harness (Connector Location)

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Floor Wire and Instrument Panel J/B (Cowl Side Panel LH)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code

See Page

Joining Wire Harness and Wire Harness (Connector Location)

IA1

42

Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)

ID2

42

Instrument Panel Wire and Cowl Wire (Left Kick Panel)

: GROUND POINTS Code

See Page

Ground Points Location

IE

42

Cowl Side Panel LH

IG

42

Cowl Side Panel RH

BI

46

Left Side of Rear Pillar

BK

46

Back Panel Center

: SPLICE POINTS Code E1

See Page 40

Wire Harness with Splice Points

Code

Engine Room Main Wire

90 2003 PRIUS (EWD493U)

See Page

Wire Harness with Splice Points

MEMO

91 2003 PRIUS (EWD493U)

B–G

F11 B , F13 D

1 D LG–R

1 B 6 2K

11

TRLY

T B9 BODY ECU 2

18 1

A

J17 JUNCTION CONNECTOR

IG

92

2003 PRIUS (EWD493U) 8 M7 MULTI DISPLAY

LG

1 2H

LG

LG

LG

2

A22 ASHTRAY ILLUMINATION

LG–R

W

TAIL RELAY

BR

W–L

100A DC/DC

FUSIBLE LINK BLOCK NO. 1

1

BR

W–B

1

C13 LIGHT CONTROL SW [COMB. SW]

120A MAIN

F18 FUSIBLE LINK BLOCK NO. 2

ILLUMINATION

5

5A PANEL

3

1 2D LG

LG

LG

2 ID2

6

6 ID2

14

OFF

TAIL

HEAD 16

W–L

BATTERY

IF

TC E

B W–L E

W–L

D B

E A 3 ILL–

E

W–B

2003 PRIUS (EWD493U) 6 B

C

ID

7 B

8 2D

7 2A

8 2K

6 2B

A

COMBINATION METER

C10 A , C11 B

L1 LIGHT CONTROL RHEOSTAT

L

JUNCTION CONNECTOR

L

W–B

LG

LG

LG

L–Y

LG

BR

C W–L

5

W–L T

J24 JUNCTION CONNECTOR

C

W–B

C 6

W–B

J21 JUNCTION CONNECTOR 10 4

W–B

B 5

C7 CENTER CLUSTER SW

LG

F B

J21 JUNCTION CONNECTOR

A

W–L

A H A

J22 A , J23 B

B W–B

F B H A

JUNCTION CONNECTOR

W–B

W–L A J21 JUNCTION CONNECTOR

5 A R2 A , R3 B

10 B

RADIO AND PLAYER

LG

F B

W–L

2

W–L

5

H7 HAZARD WARNING SW

LG

H A

W–L

W–L

J21 JUNCTION CONNECTOR

W–L

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

15A DOME

7 1J

LG

LG 2 2G

J27 A , J28 B 4 2A

F B

21 A

14 A

LG–R

W–B

A

A

J11 JUNCTION CONNECTOR

IH

93

ILLUMINATION SERVICE HINTS TAIL RELAY 5–3 : Closed with the light control SW at TAIL or HEAD position C13 COMBINATION SW 14–16 : Closed with the light control SW at TAIL or HEAD position : PARTS LOCATION Code

See Page

A22

36

B9 C7

Code

See Page

Code

F18

38

J27

36

H7

37

J28

36

J11

37

See Page A

37

B

37

L1

37

C10

A

36

J17

37

C11

B

36

J21

37

R2

A

37

R3

B

37

C13

36

J22

A

37

J23

B

37

F11

B

34

F13

D

34

J24

M7

37

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 1J

See Page

Junction Block and Wire Harness (Connector Location)

27

Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

30

Instrument Panel Wire and Instrument Panel J/B (Cowl ( Side Panel LH))

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

2A 2B 2D 2G 2H 2K

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code ID2

See Page

Joining Wire Harness and Wire Harness (Connector Location) Instrument Panel Wire and Cowl Wire (Left Kick Panel)

42

: GROUND POINTS Code

See Page

Ground Points Location

ID

42

Cowl Side Panel LH

IF

42

Left Kick Panel

IG

42

Cowl Side Panel RH

IH

42

Right Kick Panel

94 2003 PRIUS (EWD493U)

37

MEMO

95 2003 PRIUS (EWD493U)

TURN SIGNAL AND HAZARD WARNING LIGHT FROM POWER SOURCE SYSTEM (SEE PAGE 50)

10A TURN–HAZ

W–B

6 1J

H7 HAZARD SW [HAZARD WARNING SW]

W–B

10A GAUGE

10 2K

W

R–L

3

C

G–B

G–B

IA1

G–R

6

J20 JUNCTION CONNECTOR

4 C

4 ID1

8

RH

3 2F

B A

G–B

G–Y

B A

1

B B

2

W–B

W–B

G–Y

2

A J4 JUNCTION CONNECTOR

A A A

W–B

A

W–B

A

J7 JUNCTION CONNECTOR

A

2

IA1

G–Y

A W–B

J18 JUNCTION CONNECTOR

11

1

W–B

C13 TURN SIGNAL SW [COMB. SW]

4 2K

G–Y

W–B

3

LH

LR 2

J12 A , J13 B

7

1

LL

E

6

G

ER

5

L–B

EL

3

HAZ

F7 FRONT TURN SIGNAL LIGHT LH

IG T5 TURN SIGNAL FLASHER RELAY

F8 FRONT TURN SIGNAL LIGHT RH G–Y

1 B

JUNCTION CONNECTOR

4

G–R

W

R–L

12 2J

G–Y A

A J1 JUNCTION CONNECTOR

J17 JUNCTION CONNECTOR IG

IE

96 2003 PRIUS (EWD493U)

W–B

C10 TURN SIGNAL INDICATOR LIGHT [COMB. METER]

D B J22 A , J23 B

W–B

E A

JUNCTION CONNECTOR

LH

RH

A J24 JUNCTION CONNECTOR

19

18

14

W–B

L

L

L

A

8 2D

2 2A

1 2A

7 2A

R7 REAR TURN SIGNAL LIGHT RH [REAR COMB. LIGHT RH]

R6 REAR TURN SIGNAL LIGHT LH [REAR COMB. LIGHT LH]

3

5

BR

6 2B

3

5

W–B

W–B

3 2M

G–Y

5 2M

G–B

8 2K

C B W–B

J32 A , J33 B JUNCTION CONNECTOR

BR

W–B

B A

A J11 JUNCTION CONNECTOR ID

BI

BK

IH

97 2003 PRIUS (EWD493U)

TURN SIGNAL AND HAZARD WARNING LIGHT SERVICE HINTS T5 TURN SIGNAL FLASHER RELAY 1–GROUND : Approx. 12 volts with the ignition SW at ON position 4–GROUND : Always approx. 12 volts 2, 3–GROUND : Changes from approx. 12 to 0 volts with the ignition SW at ON position and the turn signal SW at LEFT or RIGHT position or the hazard SW at ON position 5–GROUND : Continuity with the turn signal SW at LEFT position 6–GROUND : Continuity with the turn signal SW at RIGHT position 8–GROUND : Continuity with the hazard SW at ON position 7–GROUND : Always continuity : PARTS LOCATION Code

See Page

Code

See Page

J11

Code

See Page

C10

36

J24

C13

36

J12

A

37

J32

A

38

F7

34

J13

B

37

J33

B

38

37

37

F8

34

J17

37

R6

39

H7

37

J18

37

R7

39

J1

37

J20

37

T5

37

J4

37

J22

A

37

J7

37

J23

B

37

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 1J

See Page

Junction Block and Wire Harness (Connector Location)

27

Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

30

Instrument Panel Wire and Instrument Panel J/B (Cowl ( Side Panel LH))

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Floor Wire and Instrument Panel J/B (Cowl Side Panel LH)

2A 2B 2D 2F 2J 2K 2M

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code

See Page

Joining Wire Harness and Wire Harness (Connector Location)

IA1

42

Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)

ID1

42

Instrument Panel Wire and Cowl Wire (Left Kick Panel)

: GROUND POINTS Code ID

See Page

Ground Points Location

42

Cowl Side Panel LH

IG

42

Cowl Side Panel RH

IH

42

Right Kick Panel

BI

46

Left Side of Rear Pillar

BK

46

Back Panel Center

IE

98 2003 PRIUS (EWD493U)

MEMO

99 2003 PRIUS (EWD493U)

STOP LIGHT FROM POWER SOURCE SYSTEM (SEE PAGE 50)

15A STOP

R–B

9 2K

2 S3 STOP LIGHT SW

G–W

1

E J14 JUNCTION CONNECTOR

G–W

E

IB1

G–W

9

C A

C A J30 A , J31 B JUNCTION CONNECTOR

R7 STOP LIGHT RH [REAR COMB. LIGHT RH]

H15 HIGH MOUNTED STOP LIGHT W–B G–W

2

1

2

5 W–B C B

B A

2

5

C B

W–B

R6 STOP LIGHT LH [REAR COMB. LIGHT LH]

G–W

A B

G–W

A B

J32 A , J33 B

W–B

JUNCTION CONNECTOR

W–B

BI

BK

100 2003 PRIUS (EWD493U)

SERVICE HINTS S3 STOP LIGHT SW 2–1 : Closed with the brake pedal depressed : PARTS LOCATION Code

See Page

H15 J14 J30

A

Code

See Page

2K

See Page

J31

B

38

R6

39

37

J32

A

38

R7

39

38

J33

B

38

S3

37

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code

Code

38

See Page

Junction Block and Wire Harness (Connector Location) Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code IB1

See Page

Joining Wire Harness and Wire Harness (Connector Location) Floor Wire and Cowl Wire (Cowl Side Panel LH)

42

: GROUND POINTS Code

See Page

Ground Points Location

BI

46

Left Side of Rear Pillar

BK

46

Back Panel Center

101 2003 PRIUS (EWD493U)

IH

MPX2

11

14 D

MPX1

ENGINE CONTROL MODULE

19 C

HTE+

18 C

HTE– RL

HTE–

B

B

A

E 9 C , E10 D

IG

102

2003 PRIUS (EWD493U) A

A

29 D

8 2D

8 2K

J17 JUNCTION CONNECTOR

ID

JUNCTION CONNECTOR

MP2+

MPX+ JUNCTION CONNECTOR

C10 A , C11 B R–B

9

B A

4

5

A

J11 JUNCTION CONNECTOR

BI R–B

R–B

J30 A , J31 B

W–B

W–B

L 1 B IF1 N2 NAVIGATION ECU R–B

R–B

R–B

R–B

JUNCTION CONNECTOR

J27 A , J28 B

R–L

D A

R7 BACK–UP LIGHT RH [REAR COMB. LIGHT RH]

W–B

R6 BACK–UP LIGHT LH [REAR COMB. LIGHT LH]

W–B

4 J22 JUNCTION CONNECTOR

11 E

J32 A , J33 B

MPD1 W–B

19 D 1

W–B

MPD2 14 E

J24 JUNCTION CONNECTOR

R–B

W–G

R–L

3 2C

W–B

13 D 4 HTE+

W–B

4

J18 JUNCTION CONNECTOR

16 P1 PARK/NEUTRAL POSITION SW

COMBINATION METER

W–B

MPX– 3 B

BR

MPX+

Y

15

H13 E , H14 D

2 B

HYBRID VEHICLE CONTROL ECU

GR

R–B

1

(SHIELDED)

7 2A GR–B

2

A7 A/C AMPLIFIER

5

G1 GATEWAY ECU

GR–B

14 A

GR

6 2B B8 BODY ECU

L

3

GR–L

BR

BACK–UP LIGHT FROM POWER SOURCE SYSTEM (SEE PAGE 50)

10A GAUGE R–B

D A

B B

B5 BACK–UP LIGHT RELAY 5 IJ1

14 REV

B A

B B

E

4

5

C B

B A

BK

SERVICE HINTS P1 PARK/NEUTRAL POSITION SW 4–1 : Closed with the shift lever at R position B5 BACK–UP LIGHT RELAY 3–5 : Closed with the shift lever at R position : PARTS LOCATION Code

See Page

A7

36

B5

36

B8

36

Code H14

See Page D

Code

See Page

37

J31

B

38

J11

37

J32

A

38

J17

37

J33

B

38

C10

A

36

J18

37

N2

39

C11

B

36

J22

37

P1

37

E9

C

36

J24

37

R6

39

E10

D

36

J27

A

37

R7

39

37

J28

B

37

37

J30

A

38

G1 H13

E

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code

See Page

Junction Block and Wire Harness (Connector Location)

2A 2B 2C

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

2D 2K

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code

See Page

Joining Wire Harness and Wire Harness (Connector Location)

IF1

42

Instrument Panel Wire and Floor Wire (Left Kick Panel)

IJ1

44

Floor No.3 Wire and Instrument Panel Wire (Under the Instrument Panel Center)

: GROUND POINTS Code

See Page

Ground Points Location

ID

42

Cowl Side Panel LH

IG

42

Cowl Side Panel RH

IH

42

Right Kick Panel

BI

46

Left Side of Rear Pillar

BK

46

Back Panel Center

103 2003 PRIUS (EWD493U)

LIGHT AUTO TURN OFF FROM POWER SOURCE SYSTEM (SEE PAGE 50)

W

(*1)

10A GAUGE

(*2) 1

3

2

5

7. 5A TAIL 2

8 1F

3

6 2K

5 2C

(* 1)

R–G

1 1B

1

R–G

1

4

TAIL RELAY

SHORT PIN

(* 1)

(* 2)

HEAD RELAY

2 30A HEAD

7. 5A ECU–B

LG

2

1

1 2H

R–W (* 2)

(* 1)

D3 DAYTIME RUNNING J20 LIGHT RELAY JUNCTION CONNECTOR R–G R–G R–G

6 IA2

R–W

B

W

(* 2)

6

H–LP

H

7

B

F

B

9 2C

(*1)

9 B B

12 KSW

BODY ECU

5 ID2

6 ID2 LG–R

13

14

D A

OFF C13 LIGHT CONTROL SW [COMB. SW]

8 2D 3 IB1 R–W

HEAD

* 1 : W/ DAYTIME RUNNING LIGHT * 2 : W/O DAYTIME RUNNING LIGHT

W–B

16

8 2K W–B

TAIL

A A

R–W

R

F B

A B W–B

1 2K

1 B

J12 A , J13 B

3

JUNCTION CONNECTOR

18 B

1

E

W–B

DCTY

R–W

17 B

LG–R

F18 FUSIBLE LINK BLOCK NO. 2

T

R

B–G

H

1

A

A J17 JUNCTION CONNECTOR

D6 DOOR COURTESY SW FRONT LH

J11 JUNCTION CONNECTOR ID

IG

104 2003 PRIUS (EWD493U)

J24 A , J25 B

IG

B9 B

1

BATTERY

15

TAIL

W–B

TRLY

1 D

120A MAIN

17

11 B

HRLY

2

JUNCTION CONNECTOR

R–W 2 B

U1 UNLOCK WARNING SW

LG

(* 2)

L–B

R–W

3 ID2

FUSIBLE LINK BLOCK NO. 1

1 C

100A DC/DC

1 B

F11 B , F12 C , F13 D

E

L–B

F

R–G

E

J27 JUNCTION CONNECTOR

L–B

(* 1)

2 ID2

SYSTEM OUTLINE With the ignition SW turned on, the current flows to TERMINAL 15 of the body ECU through GAUGE fuse. Voltage is applied at all times to TERMINAL (B) 11 of the body ECU through the TAIL relay coil side, and to TERMINAL (B) 2 through the HEAD relay coil side (w/o daytime running light) or through the daytime running light relay (w/ daytime running light). 1. NORMAL LIGHTING OPERATION

With the light control SW turned to TAIL position, a signal is input into TERMINAL (B) 18 of the body ECU. Due to this signal, the current flowing to TERMINAL (B) 11 of the body ECU flows to TERMINAL (B) 18 to TERMINAL 14 of the light control SW to TERMINAL 16 to GROUND, and taillight relay causes taillights to turn on.

With the light control SW turned to HEAD position, a signal is input into TERMINALS (B) 17 and (B) 18 of the body ECU. Due to this signal, the current flowing to TERMINAL (B) 2 of the body ECU flows to TERMINAL (B) 17 to TERMINAL 13 of the light control SW to TERMINAL 16 to GROUND in the headlight circuit, and causes taillight and HEAD relay to turn the lights on. The taillight circuit is same as above. 2. LIGHT AUTO TURN OFF OPERATION With light on and ignition SW turned off (Input signal goes to TERMINAL 15 of the body ECU), when the driver’s door is opened (Input signal goes to TERMINAL 3 of the body ECU), the ECU operates and the current is cut off which flows from TERMINAL (B) 11 of the body ECU to TERMINAL (B) 18 in taillight circuit and from TERMINAL (B) 2 to TERMINAL (B) 17 in headlight circuit. As a result, all lights are turned off automatically. SERVICE HINTS HEAD RELAY 2–1 : Closed with the light control SW at HEAD position or the dimmer SW at FLASH position Closed with the engine running and the parking brake pedal released (Parking brake SW off) [w/ daytime running light] TAIL RELAY 3–5 : Closed with the light control SW at TAIL or HEAD position D6 DOOR COURTESY SW LH 1–GROUND : Continuity with the front LH door open B9 (B) BODY ECU 15–GROUND : Approx. 12 volts with the ignition SW at ON position 3–GROUND : Continuity with the front LH door open (B) 9–GROUND : Always approx. 12 volts (B) 1–GROUND : Always continuity (B)17–GROUND : Continuity with the light control SW at HEAD position (B)18–GROUND : Continuity with the light control SW at TAIL or HEAD position : PARTS LOCATION Code B9

See Page B

36

Code F13

See Page D

Code

See Page

J20

34

37

C13

36

F18

38

J24

A

37

D3

36

J11

37

J25

B

37

D6

38

J12 J13

F11

B

34

F12

C

34

J17

A

37

J27

37

B

37

U1

37

37

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 1B

See Page

Junction Block and Wire Harness (Connector Location)

27

Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

2H

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

2K

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

1F 2C 2D

105 2003 PRIUS (EWD493U)

LIGHT AUTO TURN OFF : CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code

See Page

Joining Wire Harness and Wire Harness (Connector Location)

IA2

42

Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)

IB1

42

Floor Wire and Cowl Wire (Cowl Side Panel LH)

ID2

42

Instrument Panel Wire and Cowl Wire (Left Kick Panel)

: GROUND POINTS Code

See Page

Ground Points Location

ID

42

Cowl Side Panel LH

IG

42

Cowl Side Panel RH

106 2003 PRIUS (EWD493U)

MEMO

107 2003 PRIUS (EWD493U)

INTERIOR LIGHT FROM POWER SOURCE SYSTEM (SEE PAGE 50)

L GR–B FROM POWER SOURCE SYSTEM (SEE PAGE 50)

GR–B

GR–B

15A DOME

7. 5A ECU–B

7 1J L–Y

4 MPD1

G1 GATEWAY ECU

MPD2

5 2C 2 2G

F 3 2N L–Y

GR–L

L

J27 JUNCTION CONNECTOR

4 2A

R–G

11

14 MPX1

E10 ENGINE CONTROL MODULE

L–Y

F MPX2 13

GR

J30 A , J31 B

GR–B

E A R–G 9 B

15 A

16 A

JUNCTION CONNECTOR

B8 A , B9 B MPX+

DCTY

6

6 2L

3

3 2K

PCTY 12 A

IF1

F B

13 ID2

R–W

4

R–W

R–W J12 A , J13 B

1

OFF ON

DOOR

I16 INTERIOR LIGHT

1

JUNCTION CONNECTOR

R–L

R–B

2

E 1 B

1 2K

D A

D A

R–W 3

A

A

8 2D

R–W

D A

R–B

R–W

R–G

E B

8 2K

IB1

R–W

R–W

JUNCTION CONNECTOR

RCTY

1

1

J11 JUNCTION CONNECTOR BI

W–B

1

D7 DOOR COURTESY SW FRONT RH

1

D6 DOOR COURTESY SW FRONT LH

L6 LUGGAGE COMPARTMENT LIGHT SW

D9 DOOR COURTESY SW REAR RH

1 B

D8 DOOR COURTESY SW REAR LH

B

W–B

J33 JUNCTION CONNECTOR

LCTY 14 A

1 2N

R–W

J30 A , J31 B

W–B

2

7

MPX–

2

R–W

P5 PERSONAL LIGHT

1

LP

L–Y

L–Y L5 LUGGAGE COMPARTMENT LIGHT

L–Y

B

BODY ECU

W–B

D B

R

D B

J16 JUNCTION CONNECTOR

E A

A

ID

108 2003 PRIUS (EWD493U)

L GR–B

GR–B

GR–B

4 MP2+

MPX+

A7 A/C AMPLIFIER

GR–B

L

3 B

2 B

21 A DOOR

GR

11

C10 A , C11 B

14 A

L

COMBINATION METER

7 2A

BR

6 2B

IH

109 2003 PRIUS (EWD493U)

INTERIOR LIGHT SERVICE HINTS B8 (A), B9 (B) BODY ECU 3–GROUND : Continuity with front LH door open 6–GROUND : Continuity with rear LH, RH door open (A)12–GROUND : Continuity with front RH door open (A)14–GROUND : Continuity with luggage compartment door open (B) 9–GROUND : Always approx. 12 volts L6 LUGGAGE COMPARTMENT LIGHT SW 1–GROUND : Closed with the luggage compartment door open : PARTS LOCATION Code

See Page

A7

Code

See Page

36

D9

38

Code

See Page

J27

37

B8

A

36

E10

36

J30

A

38

B9

B

36

G1

37

J31

B

38

C10

A

36

I16

38

J33

38

B

36

C11

37

L5

38

D6

38

J12

J11 A

37

L6

38

D7

38

J13

B

37

P5

39

D8

38

J16

37

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 1J

See Page

Junction Block and Wire Harness (Connector Location)

27

Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

2G

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

2K

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Floor Wire and Instrument Panel J/B (Cowl Side Panel LH)

2A 2B 2C 2D

2L 2N

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code

See Page

Joining Wire Harness and Wire Harness (Connector Location)

IB1

42

Floor Wire and Cowl Wire (Cowl Side Panel LH)

ID2

42

Instrument Panel Wire and Cowl Wire (Left Kick Panel)

IF1

42

Instrument Panel Wire and Floor Wire (Left Kick Panel)

: GROUND POINTS Code

See Page

Ground Points Location

ID

42

Cowl Side Panel LH

IH

42

Right Kick Panel

BI

46

Left Side of Rear Pillar

110 2003 PRIUS (EWD493U)

MEMO

111 2003 PRIUS (EWD493U)

MULTIPLEX COMMUNICATION SYSTEM (COMMUNICATION BUS)

GR

16 MPX– B8 BODY ECU MPX+ 13

15

MPX2 GR–B

E10 ENGINE CONTROL MODULE MPX1 14

2 MPX+ GR–L

C11 COMBINATION METER MPX– 3

11 GR

MPD2 G1 GATEWAY ECU MPD1 11

4

MPX+ A7 A/C AMPLIFIER MP2+ 4

GR–B

112 2003 PRIUS (EWD493U)

MEMO

113 2003 PRIUS (EWD493U)

KEY REMINDER AND LIGHT REMINDER BUZZER FROM POWER SOURCE SYSTEM (SEE PAGE 50)

W

(* 1)

10A GAUGE

(* 2)

SHORT PIN

(* 1)

(* 2)

HEAD RELAY

2 30A HEAD

1

4

1

3

2

7. 5A ECU–B

5

7. 5A TAIL 2

8 1F

5 2A

5 2C

3

L

6 2K

(* 1)

R–G

1 1B

1 TAIL RELAY

2

1

1 2H

R–W R–G

(*2) IA2

(* 1)

D3 DAYTIME RUNNING J20 LIGHT RELAY JUNCTION CONNECTOR R–G R–G R–G

LG

6

J27 JUNCTION CONNECTOR

R–W

B

W

(* 2)

6

H–LP

H F

7

(* 1)

2 ID2

E

F

(*1)

LG

R–G

R–W (*2)

ID2 R–W

3

FUSIBLE LINK BLOCK NO. 1

1 C

100A DC/DC

1 B

F11 B , F12 C , F13 D

E

2 B

17

11 B

HRLY

TRLY

15

TAIL

9 B

IG

H

T

17 B

18 B

3

R

LG–R

1 2K

6 ID2 LG–R

13

14

D A R–W

R

F B

OFF C13 LIGHT CONTROL SW [COMB. SW]

TAIL

3

W–B

16 BATTERY

IB1 R–W

HEAD

J12 A , J13 B

ID2

B8 A , B9 B BODY ECU

JUNCTION CONNECTOR

5

F18 FUSIBLE LINK BLOCK NO. 2

120A MAIN

1

DCTY

R–W

B–G

1 D

1

A J17 JUNCTION CONNECTOR IG

114 2003 PRIUS (EWD493U)

D6 DOOR COURTESY SW FRONT LH

B

FROM POWER SOURCE SYSTEM (SEE PAGE 50) * 1 : W/ DAYTIME RUNNING LIGHT * 2 : W/O DAYTIME RUNNING LIGHT 15A DOME

7 1J

L–Y

L

GR–B

4 2A

4

11 GR–L

MP2+

12 KSW

GR–B

GR

L

L 21 A

1 W–B

1 B

W–B

A B

W–B

A A

BUZZER

C10 A , C11 B

14 A

COMBINATION METER

8 2D

7 2A

8 2K

6 2B

W–B

B8 A , B9 B

22 A

2

E

BODY ECU

3 B

L

MPX+

2 B

A J11 JUNCTION CONNECTOR ID

BR

15 A

MPX–

U1 UNLOCK WARNING SW

GR–B

L–B GR 16 A

9 2C

J24 A , J25 B

B

13

JUNCTION CONNECTOR

B

L–B

MPX2

11 J27 JUNCTION CONNECTOR

MPX1

E10 ENGINE CONTROL MODULE

14

L–B

MPX+

A7 A/C AMPLIFIER

MPD2

G1 GATEWAY ECU

MPD1

GR–B

2 2G 4

IH

115 2003 PRIUS (EWD493U)

KEY REMINDER AND LIGHT REMINDER BUZZER SYSTEM OUTLINE The current always flows from GAUGE fuse to body ECU TERMINAL 15. 1. LIGHT REMINDER BUZZER SYSTEM If you open the door of the driver’s side when either headlight or taillight is on with ignition SW being off, the buzzer comes on. 2. KEY REMINDER BUZZER SYSTEM If you open the door of the driver’s side when the ignition key is inserted in ignition SW being off, the buzzer comes on. SERVICE HINTS B8 (A), B9 (B) BODY ECU (B) 9–GROUND : Always approx. 12 volts (B) 1–GROUND : Always continuity 12–GROUND : Continuity with the ignition key in cylinder D6 DOOR COURTESY SW FRONT LH 1–GROUND : Closed with the driver’s door open C10 (A) COMBINATION METER (A)22–GROUND : Approx. 12 volts with the ignition SW at ON position (A)21–GROUND : Always approx. 12 volts (A)14–GROUND : Always continuity : PARTS LOCATION Code

See Page

A7

Code

See Page

E10

36

36

Code J13

See Page B

37

B8

A

36

F11

B

34

J17

B9

B

36

F12

C

34

J20

C10

A

36

F13

D

34

J24

A

37

C11

B

36

F18

38

J25

B

37

C13

36

G1

37

J27

37

D3

36

J11

37

U1

37

D6

38

J12

A

37

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code

See Page

Junction Block and Wire Harness (Connector Location)

1B 1F

27

Engine g Room Main Wire and Engine g Room J/B (Engine ( g Compartment Left))

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

1J 2A 2B 2C 2D 2G 2H 2K

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code

See Page

Joining Wire Harness and Wire Harness (Connector Location)

IA2

42

Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)

IB1

42

Floor Wire and Cowl Wire (Cowl Side Panel LH)

ID2

42

Instrument Panel Wire and Cowl Wire (Left Kick Panel)

116 2003 PRIUS (EWD493U)

37 37

: GROUND POINTS Code

See Page

Ground Points Location

ID

42

Cowl Side Panel LH

IG

42

Cowl Side Panel RH

IH

42

Right Kick Panel

117 2003 PRIUS (EWD493U)

J11 JUNCTION CONNECTOR

A 3

1

10

W–B

A A A

A

IJ1

11

A B

A A L

L

PKBL GR

GR–B

4 2A

MPX1

MPX2 4

C10 A , C11 B

1

IJ1

ID

118

2003 PRIUS (EWD493U) L

IJ1 IJ1 A7 A/C AMPLIFIER

G–O

G–O

GR–B

GR GR–L

G1 GATEWAY ECU

E10 ENGINE CONTROL MODULE 13

SEAT BELT (FRONT PASSENGER’ S SEAT)

8 GR–B

5 B

SEAT BELT (DRIVER’ S SEAT)

3 B G–O

DBKL

D B

6 2B

E A

BR

9

W–B

B8 A , B9 B

J29 JUNCTION CONNECTOR G–O

MPX+

B20 BUCKLE SW LH

15 A

J22 A , J23 B

BODY ECU P–L

MPX–

B21 BUCKLE SW RH AND SEAT BELT WARNING OCCUPANT DETECTION SENSOR

P–L

16 A

JUNCTION CONNECTOR W–B

W–B

IG

JUNCTION CONNECTOR W–B

W–B

15

J24 A , J25 B

W–B

5 2A

2

COMBINATION METER 14 A

8 2D

8 2K

7 2A

W–B

IH

L–Y

L

SEAT BELT WARNING FROM POWER SOURCE SYSTEM (SEE PAGE 50)

10A GAUGE 15A DOME

7 1J

GR–L

11 MPD2

MPD1

14 4 2 2G

MP2+

11

MPX+

2 B 3 B 22 A 21 A

SYSTEM OUTLINE When the driver has not fastened the seat belt while the ignition SW is ON, the driver seat belt warning light blinks, and a warning buzzer comes on. Also, in the front passenger seat, a sensor recognizes a passenger, and when the passenger has not fastened the seat belt, the front passenger seat belt warning light blinks. SERVICE HINTS B20 BUCKLE SW LH 1–2 : Closed with driver’s seat belt in use : PARTS LOCATION Code

See Page

A7

Code

See Page

Code

See Page

36

C10

A

36

J22

A

37

C11

B

B8

A

36

36

J23

B

37

B9

B

36

E10

36

J24

A

37

B20

38

G1

37

J25

B

37

B21

38

J11

37

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 1J

See Page

J29

37

Junction Block and Wire Harness (Connector Location)

27

Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

30

Instrument Panel Wire and Instrument Panel J/B (Cowl ( Side Panel LH))

2G

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

2K

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

2A 2B 2D

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code IJ1

See Page

Joining Wire Harness and Wire Harness (Connector Location) Floor No.3 Wire and Instrument Panel Wire (Under the Instrument Panel Center)

44

: GROUND POINTS Code

See Page

Ground Points Location

ID

42

Cowl Side Panel LH

IH

42

Right Kick Panel

119 2003 PRIUS (EWD493U)

WIPER AND WASHER FROM POWER SOURCE SYSTEM (SEE PAGE 50)

6 2I

3 2G L

L

2 2N

30A WIPER

L

15A WASHER

WF WIPER SW

W1 WASHER MOTOR L

10 IH1

EW

2

WASHER SW OFF

M

1

HI

LO

INT

OFF

ON WF

L–Y

2 IA1

L–Y

2

INT1

W–B

INT2

B1

E

11

L–W

+1

7

L–B

+2

8

L–R

+B

17

L

+S

16

15 IA1 L–W

IA1 L

W–B J18 JUNCTION CONNECTOR

A

17

L–B

16 IA1

C12 FRONT WIPER AND WASHER SW [COMB. SW]

L–R

+B

+2

+1

+S

3

5

2

1

+2

+1

+B

+S

A

W–B

M

E F9 FRONT WIPER MOTOR W–B

W–B

4

A J17 JUNCTION CONNECTOR

A

IG

120 2003 PRIUS (EWD493U)

A

IE

J1 JUNCTION CONNECTOR

A

J7 JUNCTION CONNECTOR

SYSTEM OUTLINE When the ignition SW is turned ON, the current flows from WIPER fuse to wiper and washer SW TERMINAL 17 and front wiper motor TERMINAL 2 or the current flows from WASHER fuse to washer motor TERMINAL 2. 1. LO POSITION When the wiper and washer SW is at LO position, the current flows from wiper and washer SW TERMINAL 17 to TERMINAL 7 to front wiper motor TERMINAL 5 to TERMINAL 4 to GROUND, and the front wiper motor runs at low speed. 2. HI POSITION When the wiper and washer SW is at HI position, the current flows from wiper and washer SW TERMINAL 17 to TERMINAL 8 to front wiper motor TERMINAL 3 to TERMINAL 4 to GROUND, and the front wiper motor runs at high speed. 3. INT POSITION When the wiper and washer SW is at INT position, the wiper relay is activated and the current flows from wiper and washer SW TERMINAL 17 to TERMINAL 2 to GROUND. This current activates the intermittent circuit, and the current flows from wiper and washer SW TERMINAL 17 to TERMINAL 7 to front wiper motor TERMINAL 5 to TERMINAL 4 to GROUND, and operates the front wipers. 4. WASHER INTERLOCKING OPERATION When the wiper and washer SW is pulled to WASHER position (Washer SW ON position), the current from the WASHER fuse flows to washer motor TERMINAL 2 to TERMINAL 1 to wiper and washer SW TERMINAL 11 to TERMINAL 2 to GROUND, and operates the washer motor to emit a water spray. At the same time, the current flows from the WIP fuse to wiper and washer SW TERMINAL 17 to TERMINAL 7 to front wiper motor TERMINAL 5 to TERMINAL 4 to GROUND, and operates the front wiper motor. SERVICE HINTS C12 FRONT WIPER AND WASHER SW 2–GROUND : Always continuity 7–GROUND : Approx. 12 volts with the front wiper and washer SW at LO position Approx. 2 to 12 seconds intermittently with the front wiper and washer SW at INT position 8–GROUND : Approx. 12 volts with the front wiper and washer SW at HI position 16–GROUND : Approx. 12 volts with the ignition SW on unless the front wiper motor at STOP position 17–GROUND : Approx. 12 volts the ignition SW at ON or ST position F9 FRONT WIPER MOTOR 2–1 : Closed unless the wiper motor at STOP position : PARTS LOCATION Code

See Page

Code

See Page

C12

36

J7

37

F9

34

J17

37

J1

37

J18

37

Code W1

See Page 35

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code

See Page

Junction Block and Wire Harness (Connector Location)

2G

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

2I

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

2N

31

Floor Wire and Instrument Panel J/B (Cowl Side Panel LH)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code

See Page

Joining Wire Harness and Wire Harness (Connector Location)

IA1

42

Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)

IH1

42

Floor Wire and Engine Room Main Wire (Left Kick Panel)

: GROUND POINTS Code

See Page

Ground Points Location

IE

42

Cowl Side Panel LH

IG

42

Cowl Side Panel RH

121 2003 PRIUS (EWD493U)

CIGARETTE LIGHTER FROM POWER SOURCE SYSTEM (SEE PAGE 50)

15A CIG

GR

5 2D

2 C8 CIGARETTE LIGHTER

W–B

1

A J24 JUNCTION CONNECTOR

W–B

A

8 2D

W–B

8 2K

A J11 JUNCTION CONNECTOR ID

122 2003 PRIUS (EWD493U)

SERVICE HINTS C8 CIGARETTE LIGHTER 2–GROUND : Approx. 12 volts with the ignition SW at ACC or ON position 1–GROUND : Always continuity : PARTS LOCATION Code

See Page

C8

Code J11

36

See Page 37

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code

See Page

Code J24

See Page 37

Junction Block and Wire Harness (Connector Location)

2D

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

2K

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

: GROUND POINTS Code ID

See Page 42

Ground Points Location Cowl Side Panel LH

123 2003 PRIUS (EWD493U)

HORN FROM POWER SOURCE SYSTEM (SEE PAGE 50)

10A HORN

1

5 HORN RELAY

2 1J

9 1F

B–W

3

B–R

2

IA2

1 H4 HORN

B–R

8

D J20 JUNCTION CONNECTOR

B–R

D

6 C14 HORN SW [COMB. SW]

124 2003 PRIUS (EWD493U)

SERVICE HINTS HORN RELAY 5–3 : Closed with the horn SW on : PARTS LOCATION Code

See Page

C14

36

Code H4

See Page 34

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 1F 1J

See Page

27

Code J20

See Page 37

Junction Block and Wire Harness (Connector Location) Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code IA2

See Page 42

Joining Wire Harness and Wire Harness (Connector Location) Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)

125 2003 PRIUS (EWD493U)

POWER WINDOW FROM POWER SOURCE SYSTEM (SEE PAGE 50) B8 A , B9 B 1

15A DOME

20A PWR1

10A GAUGE

BODY ECU

7. 5A ECU–B

30A POWER

B

IG 2

9 B

15

RX

DCTY

6 A

3 1 2K

R–L

W–R

L–Y 2 2G

2

J27 JUNCTION CONNECTOR F F

Y

5 2C POWER RELAY

R–W

5

10 2K

R–G

11 2J

R–G

1 7 1J

3

3 2I

L–W L–W

7 2K

J14 A , J15 B

JUNCTION CONNECTOR

A A

Y

2

1 IC1

7 IC1

2

F B

M

D4 DIODE (DOOR COURTESY) 3

D A

1

R–W

P10 POWER WINDOW MOTOR FRONT LH

DCTY 16

D A R–W

LIMIT SW

1

P9 POWER WINDOW MASTER SW

J12 A , J13 B

G

5

9

R–Y

8

R–Y

20

W–B

11

MPX1

W–B

13

4

E

DU

12

O

DDN

18

WLSW

P–L

SGND

Y

2

IG

GR

LMT

5 IG1

JUNCTION CONNECTOR

4 B

2 IC1 B–L

R–L

W–R 1

8 IC1

R–W

L–Y L–Y

3 IC1

5

PULSE SENSOR

A A

L–W

CPUB

3

C B

L–W

C

1 IG1

PLS

C B

R–L

C B

J20 JUNCTION CONNECTOR

B–L

B A

C

JUNCTION CONNECTOR

J24 A , J25 B

L–Y

4 2D

R–W

A J16 JUNCTION CONNECTOR 3

IB1 R–W

R–W

A

W–B

1

1 D7 DOOR COURTESY SW FRONT RH

126 2003 PRIUS (EWD493U)

D6 DOOR COURTESY SW FRONT LH

B8 A , B9 B BODY ECU

FLU

FLD

RRD

RLU

14

RRU

1

5

10

10 2J

5 2K

2 2L

1 2L

2 A

RLD

E 1 B

W–B

3 A

L–W L–W

L–O

G–R

8 2D

L–W

B–W

W

L–W

G–B

R–W

7 IB1

8 2K

7 IN1

5 IN1

5 BB1

3 BB1

4 BB1

5 BA1

3 BA1

4 BA1

R–W

G–B

L–W

W

B–W

L–W

L–O

G–R

W–B

3 IQ1

L–W

L–W

5

W–B

Y

2 1 BB1

E

D

P8 POWER WINDOW CONTROL SW REAR RH

M

3

5

P13 POWER WINDOW MOTOR REAR RH

D

P7 POWER WINDOW CONTROL SW REAR LH

1 1 BA1

SD

U

2

1

1 SU

2

G

3

1

P11 POWER WINDOW MOTOR FRONT RH

U

2

6 PCT

M

2

P12 POWER WINDOW MOTOR REAR LH

W–B

A

J17 JUNCTION CONNECTOR A

W–B

W–B

W–B

W–B

1 IQ1

M

4 SD

A

A

W–B

IG

BI

J11 JUNCTION CONNECTOR

2

1 SU

E

D

P6 POWER WINDOW CONTROL SW FRONT RH

6 PCT

G

5

Y

U

3

W–B

E

4 SD

Y

1 SU

W–B

6 PCT

G

4

ID

127 2003 PRIUS (EWD493U)

POWER WINDOW SYSTEM OUTLINE Communication between power window master SW and body ECU is controlled and body ECU recognizes the conditions of each SW to control the operation of windows. 1. MANUAL UP OR DOWN OPERATION (DRIVER’S WINDOW, PASSENGER’S WINDOW) During you are pushing power window master SW (Driver side) halfway down, the motor operates and the window on the driver’s side opens. During you are pulling power window master SW (Driver side) halfway up, the motor operates and the windows on the driver’s side closes. The window on the passenger’s side opens or closes by pushing down or pulling up power window master SW (Front passenger, rear passenger) or power window SW front RH, rear LH, RH. 2. AUTO UP OR DOWN OPERATION (DRIVER’S WINDOW) When the power window master SW (Driver side) is fully pushed down, the motor operates and the window on the driver’s side automatically opens. When the power window master SW (Driver side) is fully pulled up, the motor operates and the window on the driver’s side automatically closes. 3. STOPPING AUTOMATIC WINDOW OPERATION If you push the power window master SW (Driver side) halfway down during the window on the driver’s side is raising automatically, the motor’s operation stops. And if you pull the power window master SW (Driver side) halfway up during the window on the driver’s side is lowering automatically, the motor’s operation stops. 4. KEY OFF POWER WINDOW OPERATION After the Ignition SW is turned off, the windows can be operated for about 43 seconds. However, the window operation stops when either front doors opens. 5. JAM PROTECTION FUNCTION (DRIVER’S WINDOW) When any foreign object gets caught during power window UP operation, the motor rotates in the opposite direction to open the window. SERVICE HINTS P9 POWER WINDOW MASTER SW 1–GROUND : Always approx. 12 volts 4–GROUND : Approx. 12 volts with the ignition SW at ON position 9–GROUND : Always continuity B8 (A), B9 (B) BODY ECU 15–GROUND : Approx. 12 volts with the ignition SW at ON position (B)9–GROUND : Always approx. 12 volts : PARTS LOCATION Code B8 B9

See Page A

36

B

Code J15

See Page B

Code

See Page

37

P7

39

36

J16

37

P8

39

D4

36

J17

37

P9

39

D6

38

J20

37

P10

39

D7

38

J24

A

37

P11

39

J25

B

37

P12

39

P13

39

J12

A

37

J13

B

37

J27

37

J14

A

37

P6

39

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 1J 2C 2D 2G

See Page

Junction Block and Wire Harness (Connector Location)

27

Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Cowl Wire and Instrument Panel J/B ((Cowl Side Panel LH))

31

Floor Wire and Instrument Panel J/B (Cowl Side Panel LH)

2I 2J 2K 2L

128 2003 PRIUS (EWD493U)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code

See Page

Joining Wire Harness and Wire Harness (Connector Location)

IB1

42

Floor Wire and Cowl Wire (Cowl Side Panel LH)

IC1

42

Front Door LH Wire and Cowl Wire (Left Kick Panel)

IG1

42

Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)

IN1

44

Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)

IQ1

44

Front Door RH Wire and Cowl Wire (Right Kick Panel)

BA1

46

Rear Door No.2 Wire and Floor Wire (Center Pillar LH)

BB1

46

Rear Door No.1 Wire and Cowl Wire (Center Pillar RH)

: GROUND POINTS Code

See Page

Ground Points Location

IG

42

Cowl Side Panel RH

BI

46

Left Side of Rear Pillar

129 2003 PRIUS (EWD493U)

REMOTE CONTROL MIRROR FROM POWER SOURCE SYSTEM (SEE PAGE 50)

10A ACC

GR–R

2 2D

C J27 JUNCTION CONNECTOR GR–R

C

R5 REMOTE CONTROL MIRROR SW

8

OPERATION SW

LEFT/ UP

RIGHT/ DOWN

SELECT SW

HL

3

5

HR

E

6

7

LG

R–G

L

M+

2

W–B

VR

4

BR–R

VL

MH

W

MV

RIGHT

LEFT

UP

DOWN

B

A B J24 A , J25 B JUNCTION CONNECTOR A A J26 JUNCTION CONNECTOR

A

W

R–G

BR–R

9 IN1

8 IN1

10 IN1

R–G

BR–R

8 2K

3

1

5

3

W–B

5

10 IG1

W

LG

1

BR–R

LG 8 IG1

BR–R

L 9 IG1

L

A

W–B

A BR–R

8 2D

M

M

M

M A J11 JUNCTION CONNECTOR

R10 REMOTE CONTROL MIRROR LH

R11 REMOTE CONTROL MIRROR RH

130 2003 PRIUS (EWD493U)

ID

SERVICE HINTS R5 REMOTE CONTROL MIRROR SW 8–GROUND : Approx. 12 volts with the ignition SW at ACC or ON position 6–7 : Continuity with the operation SW at UP or LEFT position 8–6 : Continuity with the operation SW at DOWN or RIGHT position : PARTS LOCATION Code

See Page

J11

Code

See Page

Code

See Page

37

J26

37

R10

39

R11

39

J24

A

37

J27

37

J25

B

37

R5

37

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code

See Page

Junction Block and Wire Harness (Connector Location)

2D

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

2K

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code

See Page

Joining Wire Harness and Wire Harness (Connector Location)

IG1

42

Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)

IN1

44

Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)

: GROUND POINTS Code ID

See Page 42

Ground Points Location Cowl Side Panel LH

131 2003 PRIUS (EWD493U)

SHIFT LOCK FROM POWER SOURCE SYSTEM (SEE PAGE 50)

15A STOP

10A ACC

9 2K

5A ECU–IG

2 2I B–Y

GR–R

R–B

2 2D

2 D A

S3 STOP LIGHT SW

C A

J27 A , J28 B

D A

G–W

B–Y

JUNCTION CONNECTOR

1

J14 A JUNCTION CONNECTOR

C B

E A

B–Y

G–W

B

1 ID2

B

D

G–W

D B

5 ID1

GR–R

J14 A , J15 B JUNCTION CONNECTOR

D

GR–R

B–Y

J26 JUNCTION CONNECTOR

6

1

3

STP

ACC

J21 JUNCTION CONNECTOR

IG P1 P P2

R

3

B

2

Y

1

LOCK

FREE

SHIFT LOCK CONTROL SW SLS+

SLS– E

L–R

B

L

W–B

4

4

A B

U1 KEY INTERLOCK SOLENOID [UNLOCK WARNING SW]

J24 A , J25 B

A A

A A

3

W–B

W–B

W–B

JUNCTION CONNECTOR

E

8 2D

J21 JUNCTION CONNECTOR

W–B

W–B

E 8 2K

D B

J11 JUNCTION CONNECTOR

E A ID

J22 A , J23 B JUNCTION CONNECTOR

A

W–B

132 2003 PRIUS (EWD493U)

2

SHIFT LOCK SOLENOID

KLS+ S2 SHIFT LOCK ECU

5

1

SYSTEM OUTLINE When the ignition SW is turned to ACC position the current from the ACC fuse flows to TERMINAL 1 of the shift lock ECU, in the ON position, the current from the ECU–IG fuse flows to TERMINAL 3 of the ECU. 1. SHIFT LOCK MECHANISM With the ignition SW on, when a signal that the brake pedal is depressed (Stop light SW on) and a signal that the shift lever is put in P position (Continuity between P1 and P of the shift lock control SW) is input to the ECU, the ECU operates and current flows from TERMINAL 3 of the ECU to TERMINAL SLS+ of the shift lock solenoid to solenoid to TERMINAL SLS– to TERMINAL 5 of the ECU to GROUND. This causes the shift lock solenoid to turn on (Plate stopper disengages) and the shift lever can shift into position other than the P. 2. KEY INTERLOCK MECHANISM With the ignition SW ON or ACC position, when the shift lever is put in P position (No continuity between P2 and P of shift lock control SW), the current flowing from TERMINAL 4 of the ECU to the key interlock solenoid is cut off. This causes the key interlock solenoid to turn off (Lock lever disengages from LOCK position) and the ignition key can be turned from ACC to LOCK position. SERVICE HINTS S2 SHIFT LOCK ECU 1–GROUND : Approx. 12 volts with the ignition SW at ACC or ON position 3–GROUND : Approx. 12 volts with the ignition SW at ON position 5–GROUND : Always continuity 6–GROUND : Approx. 12 volts with the brake pedal depressed S3 STOP LIGHT SW 2–1 : Closed with the brake pedal depressed : PARTS LOCATION Code

See Page

J11 J14 J15

See Page

J23

B

37

A

37

J24

A

37

B

37

J25

B

J21 J22

Code

37

J26

37 A

J27

37

A

Code J28

See Page B

37

S2

37

37

S3

37

37

U1

37

37

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 2D 2I 2K

See Page

Junction Block and Wire Harness (Connector Location)

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code ID1 ID2

See Page 42

Joining Wire Harness and Wire Harness (Connector Location) Instrument Panel Wire and Cowl Wire (Left Kick Panel)

: GROUND POINTS Code ID

See Page 42

Ground Points Location Cowl Side Panel LH

133 2003 PRIUS (EWD493U)

DOOR LOCK CONTROL FROM POWER SOURCE SYSTEM (SEE PAGE 50)

15A DOME

7 1J

7. 5A ECU–B

10A GAUGE

30A DOOR

L–Y

5 2C

B8 A , B9 B 15

8

R–G

B

2 2G

BODY ECU

IG

LUG

B

KSW

5 A

9 B

6 2L

3 2K

W–B

L–B

F

L–Y

6

L–B

R–G

9 2C 4 2D

RCTY

E 1 B

12

J27 JUNCTION CONNECTOR

J27 JUNCTION CONNECTOR F 2

IF1

B A J24 A , J25 B

B

B

L–B

JUNCTION CONNECTOR

2

R

R–G

U1 UNLOCK WARNING SW

2

L–Y

1

1

A A

A A W–B

J24 A , J25 B

JUNCTION CONNECTOR

A B

W–B

B

8 2D

W–B

W–B

8 2K

1

D9 DOOR COURTESY SW REAR RH

W–B

B

D8 DOOR COURTESY SW REAR LH

J33 JUNCTION CONNECTOR

W–B

W–B

L–Y

1 IG1

L4 LUGGAGE COMPARTMENT DOOR UNLOCK SW

L–Y

L–B

C B

1

A J11 JUNCTION CONNECTOR BJ

W–B ID

134 2003 PRIUS (EWD493U)

B8 A , B9 B BODY ECU

PCTY

RX

1 2K

ACTD

6 A

10 B

Y

3

R–W

DCTY

12 A

G

5 IG1 Y

13 ID2

18

P9 POWER WINDOW MASTER SW

IB1

W

G G

4

R 5

R 6

1

2

M

3

W–B

R–W

3

D4 DIODE (DOOR COURTESY)

1

5 IC1

D13 DOOR LOCK MOTOR, DOOR KEY LOCK AND UNLOCK SW AND DOOR UNLOCK DETECTION SW FRONT LH

1 2 IG1

W–B

D6 DOOR COURTESY SW FRONT LH

R–W

R–W

3

D A

7 IG1

LOCK

A

D7 DOOR COURTESY SW FRONT RH

10

UNLOCK

R–W

J16 JUNCTION CONNECTOR A R–W

2

R–W

D A

R–Y

J12 A , J13 B

1

LSWD

6

7 IC1

JUNCTION F B CONNECTOR

A

KL

15

R–Y

L–Y

R–W

L–Y

KUL

16

5

G–Y

DCTY

CPUB

L–B

R–W

MPX1

W–B

135 2003 PRIUS (EWD493U)

DOOR LOCK CONTROL

B8 A , B9 B BODY ECU

L2 7 B

LSWP

ACT+

17 A

LSR

ACT–

9

16

4 2I

1 2J

18 A

8 2L

W–L

UL2 16 B

9 2L

G

B A

B A

JUNCTION CONNECTOR

A B

B B

A B

B B

R

G

W–L

W

G

L–B

C A

J22 A , J23 B

J14 A , J15 B C A

JUNCTION CONNECTOR W–L

G

R

G

W–L

B B

1

R

G

R

12 IN1

2 IN1

5 IQ1

6 IQ1

2 BB1

6 BB1

7 BB1

2 BA1

6 BA1

7 BA1

W

G

R

G

R

W–L

G

R

W–L

1

2

3

6

5

4

3

1

2

1

4

D14 DOOR LOCK MOTOR, DOOR KEY LOCK AND UNLOCK SW AND DOOR UNLOCK DETECTION SW FRONT RH

W–B

4

M

D12 DOOR LOCK MOTOR AND DOOR UNLOCK DETECTION SW REAR RH

7 IQ1

2

D11 DOOR LOCK MOTOR AND DOOR UNLOCK DETECTION SW REAR LH

1 BB1

3

W–B

W–B

W–B

W–B A B

M

W–B

M

W–B

LOCK

UNLOCK

W–L

W–L

G 11 IN1

G

IF1

L–B

12 ID2

B A

A B J18 A , J19 B

1 BA1

W–B

JUNCTION CONNECTOR A A A W–B

J17 JUNCTION CONNECTOR

A

IG

136 2003 PRIUS (EWD493U)

BI

B8 A , B9 B BODY ECU

L1

UL1

R–B

1 IN1

6 IN1 R–B

6

5

LOCK

UNLOCK

G–B

15 B

G–B

14 B

D10 DOOR LOCK CONTROL SW FRONT RH

W–B

3

2 IQ1

W–B

137 2003 PRIUS (EWD493U)

DOOR LOCK CONTROL SYSTEM OUTLINE The current is always sent from DOOR fuse to TERMINAL B of body ECU. When ignition SW is turned on, the current is sent from GAUGE fuse to TERMINAL IG of the body ECU. 1. MANUAL LOCK OPERATION When the door lock control SW (Power window master SW) is turned to LOCK position, the lock signal from TERMINAL MPX1 of power window master SW is input to TERMINAL RX of body ECU to operate ECU. The current is sent from TERMINAL ACT+ of ECU to each motor and the motor locks the doors by the current sent from TERMINAL ACT– of ECU to GROUND. 2. MANUAL UNLOCK OPERATION When the door lock control SW (Power window master SW) is turned to UNLOCK position, the unlock signal from TERMINAL MPX1 of power window master SW is input to TERMINAL RX of body ECU to operate ECU. The current is sent from TERMINAL ACT– of ECU to each motor and the motor unlocks the doors by the current sent from TERMINAL ACT+ of ECU to GROUND. 3. DOOR KEY LOCK AND UNLOCK OPERATION ∗ Lock operation from the driver’s side door When the driver’s side door is locked using the ignition key, all the doors are locked. ∗ Unlock operation from the driver’s side door When the driver’s side door is unlocked once using the ignition key, only the driver’s side door is unlocked. If this operation is repeated within 3 seconds, all the other doors are unlocked. ∗ Lock operation from the front passenger’s side door When the front passenger’s side door is locked using the ignition key, all the doors are locked. ∗ Unlock operation from the front passenger’s side door When the front passenger’s side door is unlocked using the ignition key, all the doors are unlocked SERVICE HINTS B8 (A), B9 (B) BODY ECU 15–GROUND : Approx. 12 volts with the ignition SW at ON position 8–GROUND : Always approx. 12 volts (B) 1–GROUND : Always continuity D6, D7, D8, D9 DOOR COURTESY SW FRONT LH, RH, REAR LH, RH 1–GROUND : Closed with each of the door open U1 UNLOCK WARNING SW 1–2 : Closed with the ignition key in the cylinder : PARTS LOCATION Code

See Page

Code

See Page

Code

See Page

B8

A

36

D13

38

J19

B

37

B9

B

36

D14

38

J22

A

37

D4

36

J11

37

J23

B

37

D6

38

J12

A

37

J24

A

37

D7

38

J13

B

37

J25

B

37

D8

38

J14

A

37

J27

37

D9

38

J15

B

37

J33

38

D10

38

J16

37

L4

38

D11

38

J17

37

P9

39

D12

38

37

U1

37

J18

A

138 2003 PRIUS (EWD493U)

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 1J 2C 2D 2G

See Page

Junction Block and Wire Harness (Connector Location)

27

Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Cowl Wire and Instrument Panel J/B ((Cowl Side Panel LH))

31

Floor Wire and Instrument Panel J/B (Cowl Side Panel LH)

2I 2J 2K 2L

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code

See Page

Joining Wire Harness and Wire Harness (Connector Location)

IB1

42

Floor Wire and Cowl Wire (Cowl Side Panel LH)

IC1

42

Front Door LH Wire and Cowl Wire (Left Kick Panel)

ID2

42

Instrument Panel Wire and Cowl Wire (Left Kick Panel)

IF1

42

Instrument Panel Wire and Floor Wire (Left Kick Panel)

IG1

42

Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)

IN1

44

Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)

IQ1

44

Front Door RH Wire and Cowl Wire (Right Kick Panel)

BA1

46

Rear Door No.2 Wire and Floor Wire (Center Pillar LH)

BB1

46

Rear Door No.1 Wire and Cowl Wire (Center Pillar RH)

: GROUND POINTS Code

See Page

Ground Points Location

ID

42

Cowl Side Panel LH

IG

42

Cowl Side Panel RH

BI

46

Left Side of Rear Pillar

BJ

46

Right Side of Rear Pillar

139 2003 PRIUS (EWD493U)

WIRELESS DOOR LOCK CONTROL FROM POWER SOURCE SYSTEM (SEE PAGE 50)

15A DOME

7 1J

7. 5A ECU–B

10A GAUGE

30A DOOR

L–Y

5 2C

B8 A , B9 B 15

8

B 9 B

PRG 7 A

RDA

E

KSW

8 A

L–B

3 2K

L–B

W–B

L

B–R

J27 JUNCTION CONNECTOR

IF1

B

B

L–B

L–B

R–G +B

3

2

PRG

RDA

E W5 WIRELESS DOOR CONTROL RECEIVER

W–B

1

L–Y

1 IG1

6 2L

2 R–G

L–Y

5

U1 UNLOCK WARNING SW

C B

5 A

6

2

F JUNCTION CONNECTOR

B A

J24 A , J25 B

L–Y

F

J27 JUNCTION CONNECTOR F

R–G

9 2C 4 2D

LUG

RCTY

1 B

12

R

2 2G

IG

1

L4 LUGGAGE COMPARTMENT DOOR UNLOCK SW

R–G

B

BODY ECU

2

1

W–B

E B J24 A , J25 B JUNCTION CONNECTOR

A B

A A

A A

A A

W–B

W–B

W–B

W–B

E B

J33 JUNCTION CONNECTOR

J23 B JUNCTION CONNECTOR

W–B

L–Y

1

D9 DOOR COURTESY SW REAR RH

W–B

8 2K

D8 DOOR COURTESY SW REAR LH

8 2D

B

W–B

W–B

B

1

A J11 JUNCTION CONNECTOR

W–B

ID

140 2003 PRIUS (EWD493U)

BJ

B8 A , B9 B BODY ECU

DCTY

PCTY 12 A

RX

ACTD

6 A

10 B

Y

3

R–W

1 2K G

Y

5 IG1

13 ID2 18

P9 POWER WINDOW MASTER SW

KUL

16

R–W A

6

5

4

G

R–W

3

5 IC1 G

1

7 IG1

1

2

IB1

M

3

W–B

R–W D6 DOOR COURTESY SW FRONT LH

R–W

3

LOCK

A

UNLOCK

R–W

D13 DOOR LOCK MOTOR, DOOR KEY LOCK AND UNLOCK SW AND DOOR UNLOCK DETECTION SW FRONT LH

1 2 IG1

W–B

A

D A

R–W

R–W

J16 JUNCTION CONNECTOR

D A

R

L–Y

R

2

D4 DIODE (DOOR COURTESY)

R–Y

J12 A , J13 B

D7 DOOR COURTESY SW FRONT RH

10

7 IC1

JUNCTION F B CONNECTOR

1

LSWD

6

R–Y

L–Y

KL

15

W

DCTY

5

G–Y

CPUB

L–B

R–W

MPX1

W–B

141 2003 PRIUS (EWD493U)

WIRELESS DOOR LOCK CONTROL

B8 A , B9 B BODY ECU

L2

LSWP

7 B

ACT+

17 A

LSR

ACT–

9

16

4 2I

1 2J

18 A

8 2L

W–L

UL2 16 B

9 2L

G

B A

B A

JUNCTION CONNECTOR

A B

B B

A B

B B

R

G

W–L

W

G

L–B

C A

J22 A , J23 B

J14 A , J15 B C A

JUNCTION CONNECTOR W–L

G

R

G

W–L

B B

1

R

G

R

12 IN1

2 IN1

5 IQ1

6 IQ1

2 BB1

6 BB1

7 BB1

2 BA1

6 BA1

7 BA1

W

G

R

G

R

W–L

G

R

W–L

1

2

3

6

5

4

3

1

2

1

4

D14 DOOR LOCK MOTOR, DOOR KEY LOCK AND UNLOCK SW AND DOOR UNLOCK DETECTION SW FRONT RH

M

D12 DOOR LOCK MOTOR AND DOOR UNLOCK DETECTION SW REAR RH

7 IQ1

2

D11 DOOR LOCK MOTOR AND DOOR UNLOCK DETECTION SW REAR LH

1 BB1

3

W–B

W–B

W–B

W–B A B

M

W–B

W–B

4

M

W–B

LOCK

UNLOCK

W–L

W–L

G 11 IN1

G

IF1

L–B

12 ID2

B A

A B J18 A , J19 B

1 BA1

W–B

JUNCTION CONNECTOR A A A W–B

J17 JUNCTION CONNECTOR

A

IG

142 2003 PRIUS (EWD493U)

BI

B8 A , B9 B BODY ECU

L1

UL1

R–B

1 IN1

6 IN1 R–B

6

5

LOCK

UNLOCK

G–B

15 B

G–B

14 B

D10 DOOR LOCK CONTROL SW FRONT RH

W–B

3

2 IQ1

W–B

143 2003 PRIUS (EWD493U)

WIRELESS DOOR LOCK CONTROL SYSTEM OUTLINE The current is always sent from DOOR fuse to TERMINAL B of body ECU. At the same time, the current is always sent from DOME fuse to TERMINAL CPUB of power window master SW, and from ECU–B fuse to wireless door lock receiver. When ignition SW is turned on, the current is sent from GAUGE fuse to TERMINAL IG of body ECU. 1. WIRELESS DOOR LOCK OR UNLOCK NORMAL OPERATION ∗ Lock operation When the LOCK SW of the transmitter is pushed, all the doors are locked. ∗ Unlock operation When the UNLOCK SW of the transmitter is pushed, all the doors are unlocked. 2. AUTOMATIC LOCK OPERATION After all the doors are unlocked by pushing the UNLOCK SW of the transmitter, unless each of the doors is opened or the ignition key is inserted, all the doors are locked again. 3. VISUAL CONFIRMATION OF LOCK OR UNLOCK FUNCTION When doors are locked by using the transmitter, the taillight and parking lights blink once. When doors are unlocked by using the transmitter, the taillights and parking lights blink twice. If UNLOCK SW of the transmitter is pushed while all the doors are locked, doors are unlocked and the room lights are turned on simultaneously. 4. WIRELESS CONTROL STOP FUNCTION If the following situations occur, wireless door lock function does not operate. ∗ When each of the doors opens. (Door courtesy SW is on) ∗ When ignition key is inserted to ignition SW. (Unlock warning SW is on) ∗ When ignition SW is on. 5. REPEAT FUNCTION If the doors are not locked after the lock signal is out put from transmitter by pushing LOCK SW, the lock signal is sent again to lock the doors. 6. PANIC MODE FUNCTION When the panic SW of the transmitter is pushed, the horn comes on, and the headlight and taillight flashes. SERVICE HINTS B8 (A), B9 (B) BODY ECU 15–GROUND : Approx. 12 volts with the ignition SW at ON position 8–GROUND : Always approx. 12 volts (B) 1–GROUND : Always continuity W5 WIRELESS DOOR LOCK CONTROL RECEIVER 5–GROUND : Always approx. 12 volts 1–GROUND : Always continuity U1 UNLOCK WARNING SW 2–1 : Closed with the ignition key in the cylinder : PARTS LOCATION Code B8 B9

See Page A

36

B

36

Code

See Page

D14 J11

Code

See Page

38

J23

B

37

37

J24

A

37

D4

36

J12

A

37

J25

B

37

D6

38

J13

B

37

J27

37

D7

38

J14

A

37

J33

38

D8

38

J15

B

37

L4

38

D9

38

J16

37

P9

39

D10

38

J17

37

U1

37

D11

38

J18

A

37

W5

37

D12

38

J19

B

37

D13

38

J22

A

37

144 2003 PRIUS (EWD493U)

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 1J 2C 2D 2G

See Page

Junction Block and Wire Harness (Connector Location)

27

Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Cowl Wire and Instrument Panel J/B ((Cowl Side Panel LH))

31

Floor Wire and Instrument Panel J/B (Cowl Side Panel LH)

2I 2J 2K 2L

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code

See Page

Joining Wire Harness and Wire Harness (Connector Location)

IB1

42

Floor Wire and Cowl Wire (Cowl Side Panel LH)

IC1

42

Front Door LH Wire and Cowl Wire (Left Kick Panel)

ID2

42

Instrument Panel Wire and Cowl Wire (Left Kick Panel)

IF1

42

Instrument Panel Wire and Floor Wire (Left Kick Panel)

IG1

42

Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)

IN1

44

Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)

IQ1

44

Front Door RH Wire and Cowl Wire (Right Kick Panel)

BA1

46

Rear Door No.2 Wire and Floor Wire (Center Pillar LH)

BB1

46

Rear Door No.1 Wire and Cowl Wire (Center Pillar RH)

: GROUND POINTS Code

See Page

Ground Points Location

ID

42

Cowl Side Panel LH

IG

42

Cowl Side Panel RH

BI

46

Left Side of Rear Pillar

BJ

46

Right Side of Rear Pillar

145 2003 PRIUS (EWD493U)

THEFT DETERRENT FROM POWER SOURCE SYSTEM (SEE PAGE 50)

15A DOME

7. 5A ECU–B

7 1J

10A GAUGE

30A DOOR

L–Y

5 2C

B8 A , B9 B 15

8

2 2G

R–G

B

4 2D

BODY ECU

IG

LUG

B

KSW

5 A

3 2K

L–B

W–B

L–B

R–G F J27 JUNCTION CONNECTOR

J27 JUNCTION CONNECTOR

J24 A , J25 B

C B

6

6 2L

9 2C

JUNCTION CONNECTOR

B A

RCTY

E 1 B

12

L–Y

9 B

F IF1

L–B

1 IG1

B

B

L–B

L–Y

2

R

R–G

2

1 W–B

2

A B

A A

A A

W–B

W–B

JUNCTION CONNECTOR

J24 A , J25 B

1

B

8 2D

W–B

W–B

8 2K

1

D9 DOOR COURTESY SW REAR RH

W–B

B

D8 DOOR COURTESY SW REAR LH

W–B J33 JUNCTION CONNECTOR

U1 UNLOCK WARNING SW

L–Y

L4 LUGGAGE COMPARTMENT DOOR KEY UNLOCK SW

L–Y

1

A J11 JUNCTION CONNECTOR BJ

W–B ID

146 2003 PRIUS (EWD493U)

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

7. 5A OBDI I

W–L

J26 JUNCTION CONNECTOR D D

9 2D W–L

B8 A , B9 B BODY ECU

11 A BDR

PCTY

RX

1 2K

ACTD

6 A

10 B

Y

3

R–W

DCTY

12 A

G

5 IG1 Y

13 ID2

18

P9 POWER WINDOW MASTER SW

LSWD

6

10

W

KL

15

R–Y R–W

L–Y

R

G G

4

R 5

1

2

M

3

W–B

R–W D6 DOOR COURTESY SW FRONT LH

1

6

5 IC1

LOCK

IB1

R–W

3

R–W

3

UNLOCK

A

1

7 IG1

D13 DOOR LOCK MOTOR, DOOR KEY LOCK AND UNLOCK SW AND DOOR UNLOCK DETECTION SW FRONT LH

1 2 IG1

W–B

J16 JUNCTION CONNECTOR A R–W

R–W

A

D A

R–W

D A

2

D4 DIODE (DOOR COURTESY)

J12 A , J13 B

R–Y

7 IC1

JUNCTION F B CONNECTOR

D7 DOOR COURTESY SW FRONT RH

KUL

16

5

G–Y

DCTY

CPUB

L–B

R–W

MPX1

W–B

147 2003 PRIUS (EWD493U)

THEFT DETERRENT

B8 A , B9 B BODY ECU

L2 7 B

LSWP

ACT+

17 A

LSR

ACT–

9

16

4 2I

1 2J

18 A

8 2L

W–L

UL2 16 B

9 2L

G

B A

B A

JUNCTION CONNECTOR

A B

B B

A B

B B

R

G

W–L

W

G

L–B

C A

J22 A , J23 B

J14 A , J15 B C A

JUNCTION CONNECTOR W–L

G

R

G

W–L

B B

1

R

G

R

12 IN1

2 IN1

5 IQ1

6 IQ1

2 BB1

6 BB1

7 BB1

2 BA1

6 BA1

7 BA1

W

G

R

G

R

W–L

G

R

W–L

1

2

3

6

5

4

3

1

2

1

4

D14 DOOR LOCK MOTOR, DOOR KEY LOCK AND UNLOCK SW AND DOOR UNLOCK DETECTION SW FRONT RH

W–B

4

M

D12 DOOR LOCK MOTOR AND DOOR UNLOCK DETECTION SW REAR RH

7 IQ1

2

D11 DOOR LOCK MOTOR AND DOOR UNLOCK DETECTION SW REAR LH

1 BB1

3

W–B

W–B

W–B

W–B A B

M

W–B

M

W–B

LOCK

UNLOCK

W–L

W–L

G 11 IN1

G

IF1

L–B

12 ID2

B A

A B J18 A , J19 B

1 BA1

W–B

JUNCTION CONNECTOR A A A W–B

J17 JUNCTION CONNECTOR

A

IG

148 2003 PRIUS (EWD493U)

BI

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

10A HORN

B8 A , B9 B

1

5

BODY ECU HORN RELAY L1

SH

UL1

14 B

HCTY

20 A

15 B

IND

13 A

HR

13 B

2

3

10 A

IA2

D

D

BR

8

J20 JUNCTION CONNECTOR

R–W W–B

UNLOCK

LOCK

6

4

2 D10 DOOR LOCK CONTROL SW FRONT RH

C7 CENTER CLUSTER SW

5

1

E2 ENGINE HOOD COURTESY SW

R–B

6

1

T1 THEFT DETERRENT HORN

6 IN1

G–B

B–W 1 IN1

LG–B

A

4 ID2

B–R

IE1

B–R

10

R–B

G–B

IE1

B–R

A 9

J27 JUNCTION CONNECTOR

B–R

B–R

B–W

R–W

LG–B

2 1J

A

2 IQ1 A

J7 JUNCTION CONNECTOR

W–B

3

W–B

8 C R3 B , R4 C RADIO AND PLAYER

A

IE

J1 JUNCTION CONNECTOR

BR

W–B

7 B

IF

149 2003 PRIUS (EWD493U)

THEFT DETERRENT SERVICE HINTS D13 DOOR KEY LOCK AND UNLOCK SW AND DOOR UNLOCK DETECTION SW FRONT LH 6–3 : Closed with door lock cylinder unlocked with key 5–3 : Closed with door lock cylinder locked with key D14 DOOR KEY LOCK AND UNLOCK SW AND DOOR UNLOCK DETECTION SW FRONT RH 1–4 : Closed with door lock cylinder unlocked with key 2–4 : Closed with door lock cylinder locked with key E2 ENGINE HOOD COURTESY SW 2–1 : Open with engine hood open U1 UNLOCK WARNING SW 2–1 : Closed with ignition key in cylinder L4 LUGGAGE COMPARTMENT DOOR KEY UNLOCK SW 2–1 : Closed with luggage compartment door lock cylinder unlock B8 (A), B9 (B) BODY ECU (A)17–GROUND : Continuity with front RH door unlocked (B) 1–GROUND : Always continuity (A)13–GROUND : Continuity with engine hood closed (A) 5–GROUND : Continuity with luggage compartment door open (A)12–GROUND : Continuity with front RH door open (B) 9–GROUND : Always approx. 12 volts 8–GROUND : Always approx. 12 volts 15–GROUND : Approx. 12 volts with the ignition SW at ON position 6–GROUND : Continuity with rear LH, RH door open 3–GROUND : Continuity with front LH door open : PARTS LOCATION Code B8 B9

See Page

Code

See Page

Code

See Page

A

36

E2

34

J22

A

37

B

36

J1

37

J23

B

37

C7

36

J7

37

J24

A

37

D4

36

J11

37

J25

B

37

D6

38

J12

A

37

J26

37

D7

38

J13

B

37

J27

37

D8

38

J14

A

37

J33

38

D9

38

J15

B

37

L4

38

D10

38

J16

37

P9

D11

38

J17

37

R3

B

37

D12

38

J18

A

37

R4

C

37

D13

38

J19

B

37

T1

35

D14

38

37

U1

37

J20

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 1J 2C 2D 2G

See Page

Junction Block and Wire Harness (Connector Location)

27

Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Cowl Wire and Instrument Panel J/B ((Cowl Side Panel LH))

31

Floor Wire and Instrument Panel J/B (Cowl Side Panel LH)

2I 2J 2K 2L

150 2003 PRIUS (EWD493U)

39

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code

See Page

Joining Wire Harness and Wire Harness (Connector Location)

IA2

42

Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)

IB1

42

Floor Wire and Cowl Wire (Cowl Side Panel LH)

IC1

42

Front Door LH Wire and Cowl Wire (Left Kick Panel)

ID2

42

Instrument Panel Wire and Cowl Wire (Left Kick Panel)

IE1

42

Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)

IF1

42

Instrument Panel Wire and Floor Wire (Left Kick Panel)

IG1

42

Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)

IN1

44

Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)

IQ1

44

Front Door RH Wire and Cowl Wire (Right Kick Panel)

BA1

46

Rear Door No.2 Wire and Floor Wire (Center Pillar LH)

BB1

46

Rear Door No.1 Wire and Cowl Wire (Center Pillar RH)

: GROUND POINTS Code ID IE

See Page

Ground Points Location

42

Cowl Side Panel LH

IF

42

Left Kick Panel

IG

42

Cowl Side Panel RH

BI

46

Left Side of Rear Pillar

BJ

46

Right Side of Rear Pillar

151 2003 PRIUS (EWD493U)

RADIO AND PLAYER FROM POWER SOURCE SYSTEM (SEE PAGE 50)

BR 15A DOME

10A ACC N2 NAVIGATION ECU

17 GND

2 2D AUO+

9

L–Y

GR–R

4 B

3 B

BU+B

V

2 B

ACC+B

(* 1)

6 B

FL+

FL–

R2 A , R3 B , R4 C

2

F14 FRONT DOOR SPEAKER LH

1

2

F15 FRONT DOOR SPEAKER RH

8

IF1

1

W

R

Y

IF1

RR– 3 A

5

2

R8 REAR SPEAKER LH

152 2003 PRIUS (EWD493U)

IF1

6

IF1

W

7

RR+ 1 A

Y

4 IN1

RL– 6 A

R

RL+ 2 A

B

L

3 IN1

L

(* 2)

V

(* 2)

4 IG1

1

FR– 5 B

LG

(* 2)

V

(* 2)

P P

3 IG1

FR+ 1 B

B

FL– 6 B

LG

FL+

1

2

F14 FRONT DOOR SPEAKER LH

RADIO AND PLAYER

2 B

(* 1)

R 1

B

GR–R

4 IG1 V

P

GR–R B

P

C B

IJ2

IJ2 3 IG1

(* 1)

J24 JUNCTION CONNECTOR

C A

J26 JUNCTION CONNECTOR

C A

J27 A , J28 B

B

JUNCTION CONNECTOR

B

7

2

R9 REAR SPEAKER RH

(* 1)

IJ2

L–Y

8

B

R

G G

L–Y

4 2D

IJ2

IJ1 (* 1)

4

(* 1)

IJ1

11 (*1)

V

6 1

AUO–

2

10

(*1)

AUI–

1

GR–R

L–Y

GR–R

2 2G

AUI+

(*1)

ACC 18

P

L–Y

+B 9

(*1)

7 1J

* 1 : W/ NAVIGATION SYSTEM * 2 : W/O NAVIGATION SYSTEM BR

M5 MULTI DISPLAY

9

R

F G

C

R

G

BR

GR

P–B

L–R

J26 JUNCTION CONNECTOR

R

F

F

10 C

9 C

8 C

12 C

11 C

5 C

GND

ACC+B EJECT

BU+B

R2 A , R3 B , R4 C RADIO AND PLAYER GND 7 B

BR

21

IJ1

BR

TX–

BR

TX+

BR

G

C

+B 2

L–R

EJCT

1

P–B

ACC

4

GR

GND

BR

TX+ 7

G

10

C

TX– 8

TX–

3

R

TX+

C7 CENTER CLUSTER SW

IF

153 2003 PRIUS (EWD493U)

RADIO AND PLAYER SERVICE HINTS R3 (B) RADIO AND PLAYER (B)4–GROUND : Always approx. 12 volts (B)3–GROUND : Approx. 12 volts with the ignition SW at ON or ACC position (B)7–GROUND : Always continuity N2 NAVIGATION ECU 9–GROUND : Always approx. 12 volts 18–GROUND : Approx. 12 volts with the ignition SW at ON or ACC position 17–GROUND : Always continuity : PARTS LOCATION Code

See Page

Code

See Page

Code

36

J27

F14

38

J28

F15

38

M5

37

R8

39

J24

37

N2

39

R9

39

J26

37

R2

A

37

R3

B

37

R4

See Page

C7

A

B

37

C

37

37

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code

See Page

Junction Block and Wire Harness (Connector Location)

1J

27

Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

2D

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

2G

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code

See Page

Joining Wire Harness and Wire Harness (Connector Location)

IF1

42

Instrument Panel Wire and Floor Wire (Left Kick Panel)

IG1

42

Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)

44

Floor No.3 No 3 Wire and Instrument Panel Wire (Under the Instrument Panel Center)

44

Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)

IJ1 IJ2 IN1

: GROUND POINTS Code IF

See Page 42

Ground Points Location Left Kick Panel

154 2003 PRIUS (EWD493U)

MEMO

155 2003 PRIUS (EWD493U)

NAVIGATION SYSTEM FROM POWER SOURCE SYSTEM (SEE PAGE 50) G1 GATEWAY ECU 5A ECU–IG

10A ACC

GR–R

L–Y

R

7

IJ1

22

IJ1

W

(SHIELDED)

G

(SHIELDED)

16

IJ1

10 B

W

5 B

(SHIELDED)

G

J12 A , J13 B

R IJ1

13 TC

L–Y

GR–R

IJ1

9 A

18 A

+B

1 P2 PARKING BRAKE SW

4

R 2 B

E

P–B

GR–R

B

6

R

R–Y

L–Y

J26 JUNCTION CONNECTOR

E

(SHIELDED)

GR–R

JUNCTION CONNECTOR

E A

L–Y

IJ1

VG 6 B

I5 E B

B

1

TX1– 10 B

D

J26 JUNCTION CONNECTOR

J27 A , J28 B

C B

TX1+ 5 B

7 ID1

JUNCTION CONNECTOR

C B

TC 14 A

BR

D

PKB 13 A R–Y

1 C

TX3+

P–B

J21 JUNCTION CONNECTOR

GR–R C A

GR–R

J24 A , J25 B

C B

+B1

4 C

B–Y

JUNCTION CONNECTOR

B A

ACC

2 C B–Y

IG

L–Y B A

4 A

TX3–

D

4 2D

5

11 A

D

5 ID1

GTX+

M5 A , M6 B , M7 C MULTI DISPLAY

B–Y

J14 JUNCTION CONNECTOR

L–Y 2 2G

GTX– 12 G

2 2I

2 2D

B–Y

7 1J

R–Y

15A DOME

D2 DATA LINK CONNECTOR 3

ACC

TX1+

N2 A , N3 B NAVIGATION ECU

156 2003 PRIUS (EWD493U)

TX1–

2 B R

BR

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

6 C

TX–

TX+

8

7

R

M5 A , M6 B , M7 C MULTI DISPLAY

G

C7 CENTER CLUSTER SW

10A GAUGE

3 2C

B

VR

3 B

SPD

TX+

5 A

V–W

1 B

TX–

3 A

10 A

G

SYNC 8 B

R

G 7 B

C

F

R–L

GND1

J27 A G A

JUNCTION CONNECTOR

F C C

F

R

G

G A

V–W

V–W

(SHIELDED)

Y

G

B

R

G A

10

9

J26 JUNCTION CONNECTOR

R–L

1 3

IJ1 7 2B

15

IJ1

18

IJ1

19

IJ1

20

IJ1 R4 RADIO AND PLAYER

5

R–B

2

V–W

(SHIELDED)

L

Y

G

6 2A

B

B5 BACK–UP LIGHT RELAY

TX–

W–G

IJ1

R

J27 A

D A

G

8 B SYNC

3 B B

1 B

6 B

VR

5 A

GND

REV

17 A

R–B

14 A

BR

NAVIGATION ECU

21

1 B

IJ1

5

IJ1

14 A

C10 A , C11 B COMBINATION METER 7 2A

6 2B

BR

BR

N2 A , N3 B

13 A

SPD

VG

L

7 B

R–B

JUNCTION CONNECTOR D A

BR

17

TX+

3

IF

IH

157 2003 PRIUS (EWD493U)

NAVIGATION SYSTEM SERVICE HINTS N2 (A) NAVIGATION ECU (A) 9–GROUND : Always approx. 12 volts (A)18–GROUND : Approx. 12 volts with the ignition SW at ON or ACC position (A)17–GROUND : Always continuity M7 (C) MULTI DISPLAY (C)2–GROUND : Approx. 12 volts with the ignition SW at ON position (C)4–GROUND : Approx. 12 volts with the ignition SW at ON or ACC position (C)6–GROUND : Always continuity : PARTS LOCATION Code

See Page

B5

Code

36

C7

See Page

J14

36

J21

Code

See Page

37

M6

B

37

37

M7

C

37

C10

A

36

J24

A

37

N2

A

39

C11

B

36

J25

B

37

N3

B

39

D2

36

37

P2

37

G1

37

J27

J26 A

37

R4

37

J12

A

37

J28

B

37

J13

B

37

M5

A

37

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 1J

See Page

Junction Block and Wire Harness (Connector Location)

27

Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

2G

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

2I

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

2A 2B 2C 2D

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code

See Page

Joining Wire Harness and Wire Harness (Connector Location)

ID1

42

Instrument Panel Wire and Cowl Wire (Left Kick Panel)

IJ1

44

Floor No.3 Wire and Instrument Panel Wire (Under the Instrument Panel Center)

: GROUND POINTS Code

See Page

Ground Points Location

IF

42

Left Kick Panel

IH

42

Right Kick Panel

: SPLICE POINTS Code I5

See Page 44

Wire Harness with Splice Points

Code

Instrument Panel Wire

158 2003 PRIUS (EWD493U)

See Page

Wire Harness with Splice Points

MEMO

159 2003 PRIUS (EWD493U)

GATEWAY SYSTEM FROM POWER SOURCE SYSTEM (SEE PAGE 50)

5 2C

C A

F A

5A ECU–IG

2 2I B–Y

2 2D

R–G

7. 5A ECU–B

GR–R

10A ACC

D J14 JUNCTION CONNECTOR D

JUNCTION CONNECTOR C B

GR–L

B–Y

J27 A , J28 B

14

H B 5 ID1 B–Y

MPX1

MPX2 13

8

ACC

BATT

GR–L

9

B–Y

D

GR

J21 JUNCTION CONNECTOR

R–G

GR–R

D

G1 GATEWAY ECU

E10 ENGINE CONTROL MODULE

2

11

IG

16 MPX–

MPX+

MPD2

B8 BODY ECU

GTX+ 5

GND

CG

14

MPD1 4

7 W–B

GTX– 12

GR–B

2 MPX+

J21 JUNCTION CONNECTOR

W–B

R

E G

GR–B

15

MPX– 3

11 TX3–

4

GR

W–B

E

C11 COMBINATION METER

D B

TX3+

11

J22 A , J23 B

E A

MP2+

W–B

M5 MULTI DISPLAY

MPX+

JUNCTION CONNECTOR

4

A W–B

J24 JUNCTION CONNECTOR

A

W–B

A

8 2D

W–B

8 2K

A J11 JUNCTION CONNECTOR ID

160 2003 PRIUS (EWD493U)

GR–B

A7 A/C AMPLIFIER

SERVICE HINTS G1 GATEWAY ECU 8–GROUND : Always approx. 12 volts 2–GROUND : Approx. 12 volts with the ignition SW at ON position 9–GROUND : Approx. 12 volts with the ignition SW at ACC or ON position 7, 14–GROUND : Always continuity : PARTS LOCATION Code

See Page

Code

See Page

Code

A7

36

J11

37

B8

36

J14

37

J27

C11

36

37

J28

E10

36

J22

A

37

G1

37

J23

B

37

J21

See Page

J24

M5

37 A

37

B

37 37

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 2C 2D 2I 2K

See Page

Junction Block and Wire Harness (Connector Location)

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code ID1

See Page 42

Joining Wire Harness and Wire Harness (Connector Location) Instrument Panel Wire and Cowl Wire (Left Kick Panel)

: GROUND POINTS Code ID

See Page 42

Ground Points Location Cowl Side Panel LH

161 2003 PRIUS (EWD493U)

ELECTRIC TENSION REDUCER FROM POWER SOURCE SYSTEM (SEE PAGE 50)

5A ECU–IG

B–Y

4 2C

IJ1 B–Y

12

1 T6 TENSION REDUCER SOLENOID

G

2

3 B20 TENSION REDUCER LH [BUCKLE SW LH]

W–B

1

IJ1

W–B

11

D B J22 A , J23 B JUNCTION CONNECTOR

W–B

E A

A J24 JUNCTION CONNECTOR

W–B

A

8 2D

W–B

8 2K

A J11 JUNCTION CONNECTOR ID

162 2003 PRIUS (EWD493U)

SERVICE HINTS T6 TENSION REDUCER SOLENOID 1–GROUND : Approx. 12 volts with the ignition SW at ON position B20 TENSION REDUCER LH [BUCKLE SW LH] 1–3 : Closed with driver’s seat belt in use : PARTS LOCATION Code

See Page

Code

See Page

Code

See Page

B20

38

J22

A

37

J24

37

J11

37

J23

B

37

T6

39

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 2C 2D 2K

See Page

Junction Block and Wire Harness (Connector Location)

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code IJ1

See Page 44

Joining Wire Harness and Wire Harness (Connector Location) Floor No.3 Wire and Instrument Panel Wire (Under the Instrument Panel Center)

: GROUND POINTS Code ID

See Page 42

Ground Points Location Cowl Side Panel LH

163 2003 PRIUS (EWD493U)

EMPS FROM POWER SOURCE SYSTEM (SEE PAGE 50) 1 GR–G 10A GAUGE

50A EMPS

7. 5A ECU–B

5A ECU–IG

P–B

2

W

J26 JUNCTION CONNECTOR J14 A , J15 B JUNCTION CONNECTOR

A J22 JUNCTION CONNECTOR

E

A

W

D A

E

P–B

B–Y

L

2 2I

R–G

6 2G

GR–G

3

B–R

5 2A

14

13

7

E B TC

SIL

B–Y

B–R

R–G

TS

D2 DATA LINK CONNECTOR 3 22

3

EMPS ECU

IG

RLY 2 D

2

WL 7 D

M1

M2

1 B

2 B

7 IA2

1 IM1

Y

B

3

B

3

PIG 1 C

GR

Y

B–Y

5

GR

L

5 D

GR

11

E3 A , E4 B , E5 C , E6 D

1 EMPS RELAY

B

14

L

C10 COMBINATION METER

3

3

3

IP1

L

7 2A

BR

2 M

BR

B–Y

1

IH

164 2003 PRIUS (EWD493U)

D1 DC MOTOR

6 2B

GR–G

3 ID1

GR–G

P–B

2 ID1

P–B

W

1 ID1

W

E

C

B J16 JUNCTION CONNECTOR

GR–G

B

P–B

C

W–L

E

1 D

3 D

9 D

TC

TS

E3 A , E4 B , E5 C , E6 D SIL

TRQG

WRR

WRL 10 D

W

4 D

B

3 A

B

TRQ2 2 A

G

23

15

1

3

4

VT1

VT2

GND

5 IO1

RRO

RLO

W–B

2 VCC

(SHIELDED)

W–B

I7

S1 STEERING SHAFT TORQUE SENSOR

B11 BRAKE ECU A B

A B J18 A , J19 B JUNCTION CONNECTOR

A A

W–B

(SHIELDED)

W–B

TRQ1 4 A

R

TRQV 1 A

W

PGND 2 C

(SHIELDED)

EMPS ECU

A W–B

J17 JUNCTION CONNECTOR

A

IG

165 2003 PRIUS (EWD493U)

EMPS SYSTEM OUTLINE In this system, the controller determines the direction and the amount of the assistant force based on the signals from the vehicle speed sensor and the torque sensor that is built in the gear box. The controller then assists the operation of the steering wheel by controlling the DC motor installed in the steering gear box. SERVICE HINTS E5 (C), E6 (D) EMPS ECU (D) 5–GROUND : Approx. 12 volts with the ignition SW at ON position (C) 2–GROUND : Always continuity : PARTS LOCATION Code

See Page

B11

36

C10 D1 D2

Code

See Page

Code

See Page

E5

C

36

J18

36

E6

D

36

J19

34

J14

A

37

J22

37

36

J15

B

37

J26

37

S1

35

E3

A

36

J16

37

E4

B

36

J17

37

A

37

B

37

: RELAY BLOCKS Code 3

See Page 24

Relay Blocks (Relay Block Location) Engine Room R/B No.3 (Engine Compartment Right)

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 2A

See Page

Junction Block and Wire Harness (Connector Location)

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

2G

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

2I

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

2B

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code

See Page

Joining Wire Harness and Wire Harness (Connector Location)

IA2

42

Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)

ID1

42

Instrument Panel Wire and Cowl Wire (Left Kick Panel)

IM1

44

Engine Room Main Wire and Cowl Wire (Right Kick Panel)

IO1

44

Engine Wire and Cowl Wire (Right Kick Panel)

IP1

44

Instrument Panel Wire and Cowl Wire (Right Kick Panel)

: GROUND POINTS Code

See Page

Ground Points Location

IG

42

Cowl Side Panel RH

IH

42

Right Kick Panel

: SPLICE POINTS Code I7

See Page 44

Wire Harness with Splice Points

Code

Engine Wire

166 2003 PRIUS (EWD493U)

See Page

Wire Harness with Splice Points

SRS NOTICE: When inspecting or repairing the SRS, perform the operation in accordance with the following precautionary instructions and the procedure and precautions in the Repair Manual for the applicable model year. D Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most important source of information when troubleshooting. When troubleshooting the SRS, always inspect the DTCs before disconnecting the battery. D Work must be started after 90 seconds from when the ignition switch is turned to the ”LOCK” position and the negative (–) terminal cable is disconnected from the battery. (The SRS is equipped with a back–up power source so that if work is started within 90 seconds from disconnecting the negative (–) terminal cable of the battery, the SRS may be deployed.) D When the negative (–) terminal cable is disconnected from the battery, the memory of the clock and audio system will be canceled. So before starting work, make a record of the contents memorized in the audio memory system. When work is finished, reset the audio systems as they were before and adjust the clock. To avoid erasing the memory in each memory system, never use a back–up power supply from outside the vehicle. D Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during repairs. D Do not expose the steering wheel pad, front passenger airbag assembly, side airbag assembly, seat belt pretensioner, airbag sensor assembly or side airbag sensor directly to hot air or flames. D Even in cases of a minor collision where the SRS does not deploy, the steering wheel pad, front passenger airbag assembly, side airbag assembly, seat belt pretensioner, airbag sensor assembly and side airbag sensor assembly should be inspected. D Never use SRS parts from another vehicle. When replacing parts, replace them with new parts. D Never disassemble and repair the steering wheel pad, front passenger airbag assembly, side airbag assembly, seat belt pretensioner, airbag sensor assembly or side airbag sensor assembly in order to reuse it. D If the steering wheel pad, front passenger airbag assembly, side airbag assembly, seat belt pretensioner, airbag sensor assembly or side airbag sensor assembly has been dropped, or if there are cracks, dents or other defects in the case, bracket or connector, replace them with new ones. D Use a volt/ohmmeter with high impedance (10 kΩ/V minimum) for troubleshooting the system’s electrical circuits. D Information labels are attached to the periphery of the SRS components. Follow the instructions on the notices. D After work on the SRS is completed, perform the SRS warning light check. D If the vehicle is equipped with a mobile communication system, refer to the precaution in the IN section of the Repair Manual.

167 2003 PRIUS (EWD493U)

SRS FROM POWER SOURCE SYSTEM (SEE PAGE 50)

ACC AM1

10A SRS ACC

IG1

4 2E IG2 6

GR

W–R

7 AM2

B–W

ST2

I15 IGNITION SW S5 SIDE AIRBAG SENSOR RH

ABFS

GR

(* 1)

LG

4

(* 1)

3

(* 1)

2

L–Y

P

7 A

1

(* 1)

23 B

4

(* 1)

P–L

6 B

3

GR–L

L

5 B

2

(* 1)

GR

1

B–O

W–R

3

LG–B

2 2E

S4 SIDE AIRBAG SENSOR LH

(* 1)

1 2G

H13 HYBRID VEHICLE CONTROL ECU

L–W

5 2B

(* 1)

2 2C

9 1J

IG2

ACC

GSW2

10 A

VUPL

12 A

SSL+

9 A

SSL–

12 C

ESL

VUPR

9 C SSR+

7 C SSR–

10 C ESR

A17 A , A18 B , A19 C

2

1

PL+

PL–

PR+

PR–

2 A

1 A

5 C

6 C

Y

1

SFR+ 1 C

Y–B

Y–R

2

SFR– 2 C

Y

Y–G

1

SFL– 5 A

Y–B

Y–R

SFL+

2

1

2

1

(* 1)

6 A

Y–R

11 B

(* 1)

10 B

Y–G

13 B

(* 1)

14 B

Y–G

P–

(* 1)

P+

Y

D+

B

2 1B

AIRBAG SENSOR ASSEMBLY D–

Y–B

15A AM2

1 C F12 C , F13 D FUSIBLE LINK BLOCK NO. 1

B–G

1 D

120A MAIN

1

F18 FUSIBLE LINK BLOCK NO. 2

SPIRAL CABLE

A21 AIRBAG SQUIB (STEERING WHEEL PAD)

A20 AIRBAG SQUIB (FRONT PASSENGER AIRBAG ASSEMBLY)

2

S6 SIDE AIRBAG SQUIB LH

BATTERY

168 2003 PRIUS (EWD493U)

2

S7 SIDE AIRBAG SQUIB RH

1

P14 PRETENSIONER LH

P15 PRETENSIONER RH

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

* 1 : W/ SIDE AIRBAGS

D2 DATA LINK CONNECTOR 3

AB C10 A , C11 B

4 2B

9 2A

GR–R

C B 14 A

J27 A , J28 B

C A

B

L

C B

E

5 B

L

B–Y J22 A , J23 B

A A

JUNCTION CONNECTOR

J26 JUNCTION CONNECTOR

W

P–B

16 A

E

2 2D

SRS WARNING LIGHT [COMB. METER]

JUNCTION CONNECTOR

6

GR–R

SIL 7

GR–R

TC 13

10A ACC

B

1 2E

P–B

W

B–Y

J26 JUNCTION CONNECTOR

19 B

12 B

3 B

TC

LA

SIL

A17 A , A18 B , A19 C

B9 BODY ECU 3

IJ1

A A

L 6 2B

8 2K

W–B BR

F2 FRONT AIRBAG SENSOR RH

W–B

E A F1 FRONT AIRBAG SENSOR LH

8 2D

1

A A

A B

10

IJ1

A

W–B

W–B

D B

7 2A

3 2E

W–B

W–B

11

W–B

1

W–B

2

3

J24 A , J25 B

1

2

1

JUNCTION CONNECTOR

2

P–L

B20 BUCKLE SW LH

IL1

J22 A , J23 B

4

JUNCTION CONNECTOR

IL1

IJ1

W–B

3

BR–W

IL1

B–W

2

BR

IL1

W–R

1

9

W–B

G–O 2

B21 BUCKLE SW RH AND SEAT BELT WARNING OCCUPANT DETECTION SENSOR

A

E1 27 B

P–L

A

E2 28 B

W–B

RBE+ 8 C

11 A

G–O

B–W

LBE+

–SR 20 B

J29 JUNCTION CONNECTOR

9 B

G–O

26 B

BR–W

15 B

BR

+SR

W–R

–SL

W–B

AIRBAG SENSOR ASSEMBLY +SL

J11 JUNCTION CONNECTOR ID

IH

169 2003 PRIUS (EWD493U)

SRS SYSTEM OUTLINE The SRS is a driver and front passenger protection device which has a supplemental role to the seat belts. When the ignition SW is turned to ACC or ON, current from the SRS ACC fuse flows to TERMINAL (B) 6 of the airbag sensor assembly. Only when the ignition SW is on does the current flow TERMINAL (B) 5 of the airbag sensor assembly. If an accident occurs while driving, when the frontal impact exceeds a set level, current flows to TERMINALS (B) 14, (B) 10, (A) 2 and (C) 5 of the airbag sensor assembly to TERMINAL 1 of the airbag squibs and the pretensioners to TERMINAL 2 to TERMINALS (B) 13, (B) 11, (A) 1 and (C) 6 of the airbag sensor assembly to TERMINAL (B) 27, (B) 28 or BODY GROUND to GROUND, so that current flows to the front airbag squibs and the pretensioners and causes them to operate. When the side impact also exceeds a set level, current from the ignition SW (IG2) or SRS ACC fuse flows to TERMINALS (A) 5, (C) 2, (A) 2 and (C) 5 of the airbag sensor assembly to TERMINAL 1 of the side airbag squibs and the pretensioners to TERMINAL 2 to TERMINALS (A) 6, (C) 1, (A) 1 and (C) 6 of the airbag sensor assembly to TERMINAL (B) 27, (B) 28 or BODY GROUND to GROUND, causing side airbag squibs and the pretensioners to operate. The airbag stored inside the steering wheel pad is instantaneously expanded to soften the shock to the driver. The airbag stored inside the passenger’s instrument panel is instantaneously expanded to soften the shock to the front passenger. Side airbags are instantaneously expanded to soften the shock of side to the driver and front passenger (w/ side airbags). The pretensioners make sure of the seat belt restrainability. : PARTS LOCATION Code A17

See Page

Code

See Page

F1

34

Code

36

A18

B

36

A19

C

36

F12

C

34

J27

A

37

A20

36

F13

D

34

J28

B

37

A21

36

F18

38

J29

37

B9

36

H13

37

P14

39

B20

38

I15

37

P15

39

B21

38

J11

37

S4

39

F2

J25

See Page

A

34

B J26

37 37

C10

A

36

J22

A

37

S5

39

C11

B

36

J23

B

37

S6

39

36

J24

A

37

S7

39

D2

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 1B

See Page

Junction Block and Wire Harness (Connector Location)

27

Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

30

Instrument Panel Wire and Instrument Panel J/B (Cowl ( Side Panel LH))

2G

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

2K

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

1J 2A 2B 2C 2D 2E

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code

See Page

Joining Wire Harness and Wire Harness (Connector Location)

IJ1

44

Floor No.3 Wire and Instrument Panel Wire (Under the Instrument Panel Center)

IL1

44

Instrument Panel Wire and Engine Room Main Wire (Right Kick Panel)

: GROUND POINTS Code

See Page

Ground Points Location

ID

42

Cowl Side Panel LH

IH

42

Right Kick Panel

170 2003 PRIUS (EWD493U)

MEMO

171 2003 PRIUS (EWD493U)

ABS FROM POWER SOURCE SYSTEM (SEE PAGE 50) 1

1

20A ABS NO. 3 IG2 6 2

ST2

B

2 2C

3

B–W

W–L

I15 IGNITION SW

2

4 1K

B–W

6 1K W–R

40A ABS NO. 1

W–R

7 AM2

30A ABS NO. 2

1 2G R W–R

L–O 14 IA2

3

2

4

1

3

2

4

3

3

1

4

3

6

B

2 1B

2

ABS SOL RELAY

1

2

HYDRO MTR NO. 2 RELAY

2

HYDRO MTR NO. 1 RELAY

2 15A AM2

Y–B

Y–B

L–O

9 1J

Y–B

2

3 R

G

2 LG–R

1 C

2 Y–G

G–W

2

3 B–L

F12 C , F13 D FUSIBLE LINK BLOCK NO. 1

LG–R Y–G

B–G

1 D

1 F18 FUSIBLE LINK BLOCK NO. 2 120A MAIN

G G–W

BATTERY

172 2003 PRIUS (EWD493U)

B1 A , B2 B , B3 C BRAKE ACTUATOR

5 C

9 C

10 C

2 B

12 C

3 B

4 C

11 C

3 C

6 C

2 C

1 C

R

1 B

R–W

Y–B

R–G

R–Y

R–L

G–W

G–B

G–O

B–O

L

LG

5 2B

R–B

B–W

1 A

2 A

21 A

7 A

8 A

9 A

4 A

3 A

5 A

6 D

1 D

8 D

12 2G R L–O

B–W

Y–B

7 B R1+

3 D R2+

1 C IG2

SFRR

SFRH

SFLH

SFLR

SRRH

SRRR

SMC1

SMC2

SS

AST

SLA+

SLA–

B10 A , B11 B , B12 C , B13 D BRAKE ECU MR2 2 D

GND1

GND2

31 A

6 A

W–B

MR1 29 A

W–B

SR 19 A

MTT

MT+

27 A

28 A

MT–

PH

18 A

11 A

PL 9 D

Y–G

Y

GR

Y–R

LG–R

W–L

B–L

3 B

3 A

6 A

1 A

5 B

Y–G

H5 A , H6 B

2 B

5 A

1 B

4 A

4 B

W–B

2 A

W–B

W–B

W–B

HYDRAULIC BOOSTER

W–B

G

W–B

G–W

W–B

E5

W–B

E5

A J1 JUNCTION CONNECTOR

A A

W–B

A

A

A

W–B

J7 JUNCTION CONNECTOR

IE

173 2003 PRIUS (EWD493U)

ABS B1 A , B2 B , B3 C BRAKE ACTUATOR

SLR–

15 C

EREG

SG2

(SHIELDED)

24 C

PREG

R

25 C

VREG

3 A

W

16 C

SG1

7 A

B

(SHIELDED)

12 A

E2

R

23 A

PMC

11 A

W

(SHIELDED)

22 A

VCM

4 A

B

R

10 A

8 A

(SHIELDED)

12 A

1 A

W

7 D

5 A

B

(SHIELDED)

V

16 D SLR+

9 A

(SHIELDED)

7 C

P

8 C

9 C

28 C

27 C

18 C

VFR

PFR

EFR

SG3

B10 A , B11 B , B12 C , B13 D BRAKE ECU GND4

FL+

FL–

16 A

15 A

FSS 24 A

FR–

FR+ 14 A

13 A

RL+

RL–

19 B

20 B

L

1 IB1

2

A4 ABS SPEED SENSOR FRONT LH

2

1

A5 ABS SPEED SENSOR FRONT RH

A J11 JUNCTION CONNECTOR ID

174 2003 PRIUS (EWD493U)

L

IB1

1

2

A23 ABS SPEED SENSOR REAR LH

(SHIELDED)

IB1

P 1

W–B

W–B

1

2

W–B

2

B4 BRAKE FLUID LEVEL WARNING SW

5

P

(SHIELDED)

(SHIELDED)

G

I1 R

(SHIELDED)

W–B

W–B

LG–R

BR

17 B

L

GND3 8 B

P

LBL 7 C

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

B1 A , B2 B , B3 C BRAKE ACTUATOR

1

10A ABS NO. 4 10 A

6 A

5A ECU–IG

2 A 2 3

B–Y

2 2I

B–Y

2 BUZZER

JUNCTION CONNECTOR E B

L

(SHIELDED)

E B 1

G

R

W

B

(SHIELDED)

J14 A , J15 B

B14 BRAKE WARNING BUZZER

D A

B–Y

B–Y

IA2 G

13

5 D VRR

13 D

20 D

PRR

19 D

ERR

22 D

SG4

20 C

6 B

BZ

IG1

+BS

B10 A , B11 B , B12 C , B13 D BRAKE ECU RRO

W

HVO–

RLO 15 B

B

17

HVO+

(SHIELDED)

18

23 B

4

10

I3 20

30

W–B

R–Y

W–B

HVI–

E6 EMPS ECU

18 IA2

HVI+

1

HVO– 22 B

(SHIELDED)

(SHIELDED)

Y

BR

I3

(SHIELDED)

I3

HVO+ 14 B

R

R–Y

BR–B

HVI– 16 B

G

HVI+ 24 B

(SHIELDED)

PKB 13 C

V

RR– 12 B

LG

RR+ 11 B

H14 HYBRID VEHICLE CONTROL ECU

2 A

A24 ABS SPEED SENSOR REAR RH

J10 JUNCTION CONNECTOR

A E J12 JUNCTION CONNECTOR

A

A B

E

J18 A , J19 B

R–Y

A A 1 P2 PARKING BRAKE SW

JUNCTION CONNECTOR

W–B

W–B

RSS 21 B

A

A

J17 JUNCTION CONNECTOR

J11 JUNCTION CONNECTOR ID

IG

175 2003 PRIUS (EWD493U)

ABS FROM POWER SOURCE SYSTEM (SEE PAGE 50)

15A STOP

10A GAUGE

9 2K

GR–L

L

R–B

5 2A

14 S3 STOP LIGHT SW

MPX1

MPX2 13 GR

2 2K J14 A

4

JUNCTION CONNECTOR

16 A MPX–

B–W

V–R

G–W

E A

V–R

R–Y

B–W

PKB

MPX+

B8 A

E A

BODY ECU

G–W

R–Y

1

E10 ENGINE CONTROL MODULE

2

15 A 18 B

2 B

1 IP1

2

IP1 GR–B

SP1 L

WA

L

BRL

STP

L

5 B

1 B

9 A

10 A

22 A

2 B

B10 A , B11 B , B12 C , B13 D BRAKE ECU D/G

TS

10 B

4 B

P–B

W–L

GR–G

ABS

3 B

C

E

B

C

E

B

BRAKE

TC

W

14 A

3 B

C10 A , C11 B COMBINATION METER

GR

3 ID1

GR–L

L

W 1 ID1

GR–G

P–B 2 ID1 P–B

J16 JUNCTION CONNECTOR

13

7

TC

SIL

D2 DATA LINK CONNECTOR 3

11 MPX+

MP2+

G1 GATEWAY ECU

A7 A/C AMPLIFIER

6 2B

BR

W

A

P–B

E

A

GR–G

E

J22 JUNCTION CONNECTOR

J26 JUNCTION CONNECTOR

7 2A

4

GR–B

IH

176 2003 PRIUS (EWD493U)

MPD2

MPD1 4

14 TS

11

SYSTEM OUTLINE 1. INPUT SIGNALS (1) Speed sensor signal The speed of the wheels is detected and input to TERMINALS FL+, FR+, RL+ and RR+ of the brake ECU. (2) Stop light SW signal A signal is input to TERMINAL STP of the brake ECU when the brake pedal is depressed. 2. ABS SYSTEM OPERATION During sudden braking the brake ECU has signals input from each sensor, which controls the current to the solenoid inside the actuator and lets the hydraulic pressure acting on each wheel cylinder escape to the reservoir. The pump inside the actuator is also operating at this time and it returns the brake fluid from the reservoir to the master cylinder, thus preventing locking of the vehicle wheels. If the brake ECU judges that the hydraulic pressure acting on the wheel cylinder is insufficient, the current on the solenoid is controlled and the hydraulic pressure is increased. Holding of the hydraulic pressure is also controlled by the brake ECU, by the same method as above. Pressure reduction, holding and increase are repeated to maintain vehicle stability and to improve steerability during sudden braking. SERVICE HINTS A4, A5 ABS SPEED SENSOR FRONT LH, RH 2–1 : 1.4–1.8 kΩ (20°C, 68°F) A23, A24 ABS SPEED SENSOR REAR LH, RH 2–1 : 1.04–1.3 kΩ (20°C, 68°F) B10 (A), B11 (B), B12 (C), B13 (D) BRAKE ECU (B) 6, (C) 1–GROUND : Approx. 12 volts with the ignition SW at ON position (D) 22–GROUND : Always approx. 12 volts (A) 6, (A)31–GROUND : Always continuity : PARTS LOCATION Code

See Page

Code

See Page

Code

See Page

A4

34

C10

A

36

J10

37

A5

34

C11

B

36

J11

37

A7

36

D2

36

J12

A23

38

E6

36

J14

A

37

A24

38

E10

36

J15

B

37

37

B1

A

34

F12

C

34

J16

37

B2

B

34

F13

D

34

J17

37

C

34

F18

38

J18

A

37

34

G1

37

J19

B

37

B3 B4 B8

A

36

H5

A

34

J22

37

B10

A

36

H6

B

34

J26

37

B11

B

36

H14

37

P2

37

B12

C

36

I15

37

S3

37

B13

D

36

J1

37

36

J7

37

B14

: RELAY BLOCKS Code

See Page

Relay Blocks (Relay Block Location)

2

23

Engine Room R/B No.2 (Right Side of Reserve Tank)

3

24

Engine Room R/B No.3 (Engine Compartment Right)

177 2003 PRIUS (EWD493U)

ABS

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code

See Page

Junction Block and Wire Harness (Connector Location)

1B 1J

27

Engine g Room Main Wire and Engine g Room J/B (Engine ( g Compartment Left))

30

Instrument Panel Wire and Instrument Panel J/B (Cowl ( Side Panel LH))

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

1K 2A 2B 2C 2G 2I 2K

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code

See Page

Joining Wire Harness and Wire Harness (Connector Location)

IA2

42

Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)

IB1

42

Floor Wire and Cowl Wire (Cowl Side Panel LH)

ID1

42

Instrument Panel Wire and Cowl Wire (Left Kick Panel)

IP1

44

Instrument Panel Wire and Cowl Wire (Right Kick Panel)

: GROUND POINTS Code ID

See Page

Ground Points Location

42

Cowl Side Panel LH

IG

42

Cowl Side Panel RH

IH

42

Right Kick Panel

IE

: SPLICE POINTS Code

See Page

E5

40

I1

44

Wire Harness with Splice Points Engine Room Main Wire

Code I3

178 2003 PRIUS (EWD493U)

See Page 44

Wire Harness with Splice Points Cowl Wire

MEMO

179 2003 PRIUS (EWD493U)

REAR WINDOW DEFOGGER FROM POWER SOURCE SYSTEM (SEE PAGE 50) 1

40A DEF

10A GAUGE

2

5

1 DEF RELAY

3

4 2M

2

13 DFG

MPX+

B8 A BODY ECU

GR–B

B

15 A

2 MPX+

C11 COMBINATION METER

MPX–

GR

3

1 11 REAR WINDOW DEFOGGER

MPX

REAR WINDOW DEFOGGER SW PSG SW RDEF A7 A/C AMPLIFIER

N4 NOISE FILTER (REAR WINDOW DEFOGGER)

180 2003 PRIUS (EWD493U)

SERVICE HINTS DEF RELAY 5–3 : Closed with the ignition SW on and the rear window defogger SW on : PARTS LOCATION Code

See Page

A7 B8

A

Code

See Page

36

C11

36

36

N4

39

Code

See Page

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 2M

See Page

31

Junction Block and Wire Harness (Connector Location) Floor Wire and Instrument Panel J/B (Cowl Side Panel LH)

181 2003 PRIUS (EWD493U)

COMBINATION METER FROM POWER SOURCE SYSTEM (SEE PAGE 50)

B8 A , B9 B BODY ECU

5

1

6

2 2G

J27 A

SENSOR L–R

L–Y

JUNCTION CONNECTOR

L

F A

F A

F16 FUEL SENDER

FUEL SENDER

4 2A

MPX2

MPX1 14

4

L

GR–L

L–Y

L–W

8

R–G

13

4

IP1

MPX+ 15 A

GR–B

BR–R

9 2J

BR–R

8 2J Y–B

6 2J

L–Y

MPX– 16 B

E10 ENGINE CONTROL MODULE

FU– 19

GR

FU+ 11

Y–B

7 1J

R–G

FUA 20

R–G

5 2A

5 2C

B 9 B

Y

15A DOME

Y

10A GAUGE

7. 5A ECU–B

5

IP1 L

L

GR–L C10 A , C11 B 12 A

6 B

1 B

9 A

11 A

W–G

L

L

21 A

COMBINATION METER

20 A

LG–R

22 A

1

H8 ODO/TRIP SW [HAZARD WARNING SW]

IH

182 2003 PRIUS (EWD493U)

FROM EMPS ECU

BR

6 2B

TC FROM BRAKE ECU

ODO

FROM BACK–UP LIGHT RELAY

5 E

7 B

TO LIGHT CONTROL RHEOSTAT

3 7 2A

1 A

W–L

L

3 A

L

2 A

L

14 A

L

VFD

2 B

11

FROM HYBRID VEHICLE CONTROL ECU

V–W

G B

FROM ENGINE CONTROL MODULE

G B

MPD2

J27 A , J28 B JUNCTION CONNECTOR G A

4

7 2B

G A

G A V–W

4

V–W

MPD1

GR–B A7 A/C AMPLIFIER

G1 GATEWAY ECU

GR–L

V–W

FROM MULTI DISPLAY V–W

FROM NAVIGATION ECU

MP2+

MPX+

6 2A

L

GR–L

GR

11

3 B

13 A

C10 A , C11 B

CHARGE

OIL

SEAT BELT (FRONT PASSENGER’ S SEAT)

SEAT BELT (DRIVER’ S SEAT)

BRAKE

HEAD

DOOR

COMBINATION METER

BUZZER

183 2003 PRIUS (EWD493U)

184

2003 PRIUS (EWD493U)

TO AIRBAG SENSOR ASSEMBLY

TO BRAKE ECU

TO ENGINE CONTROL MODULE

4 B 10 A 16 A

L

B–Y

C10 A , C11 B L

COMBINATION METER FROM HEADLIGHTS (* 1) FROM DAYTIME RUNNING LIGHT RELAY (* 2)

FROM TURN SIGNAL FLASHER RELAY

B

HIGH BEAM

GR–R L

GR–R

TURN R

C B

L

J27 A , J28 B

GR–R

JUNCTION CONNECTOR J26 JUNCTION CONNECTOR

GR–R

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

TURN L

SRS

ABS

MALFUNCTION INDICATOR LAMP

C A

G–R

OUTPUT CONTROL

WATER TEMP. (HIGH)

WATER TEMP. (LOW)

CRUISE

COMBINATION METER * 1 : W/O DAYTIME RUNNING LIGHT * 2 : W/ DAYTIME RUNNING LIGHT

10A ACC

2 2D

B

5 B 19 A 18 A 17 A

SERVICE HINTS C10 (A), C11 (B) COMBINATION METER (A)22–GROUND : Approx. 12 volts with the ignition SW at ON position (B) 5–GROUND : Approx. 12 volts with the ignition SW at ON or ACC position (A)21–GROUND : Always approx. 12 volts (A)14–GROUND : Always continuity : PARTS LOCATION Code

See Page

A7

36

Code C11

See Page B

Code

See Page

36

H8

37

J26

37

B8

A

36

E10

36

B9

B

36

F16

38

J27

A

37

C10

A

36

G1

37

J28

B

37

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 1J

See Page

Junction Block and Wire Harness (Connector Location)

27

Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

2G

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

2J

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

2A 2B 2C 2D

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code IP1

See Page 44

Joining Wire Harness and Wire Harness (Connector Location) Instrument Panel Wire and Cowl Wire (Right Kick Panel)

: GROUND POINTS Code IH

See Page 42

Ground Points Location Right Kick Panel

185 2003 PRIUS (EWD493U)

RADIATOR FAN AND CONDENSER FAN FROM POWER SOURCE SYSTEM (SEE PAGE 50) 1

30A RDI

5A ECU–IG

30A CDS FAN

2 7 2G

4 M

R1 RADIATOR FAN MOTOR

FAN

1

W–B

2 1K

W–G

6

IE1

1 M 2

5 1K

2

12 1J

V–Y

10 1J

A1 A/C CONDENSER FAN MOTOR G–W

2

5 1J

3

R–W

11 1A

FAN NO. 3 RELAY

2

L–W

3 1K

LG

L–W

7 1K

1

FAN NO. 2 RELAY 5

W–B

2

5

B–Y

4

FAN NO. 1 RELAY 3

1

7

4 1J

B–Y

3

R–W

1

E7 ENGINE CONTROL MODULE

5

IE1

E5 1 A8 A/C AMPLIFIER

2

V–Y

W–B

RF

E A J27 A , J28 B

A3 A/C SINGLE PRESSURE SW A B

JUNCTION CONNECTOR

V–Y

3

IE1

V–Y

W–B

11

2 W4 WATER TEMP. SW

A W–B

J7 JUNCTION CONNECTOR

A

W–B

A

1

A

W–B

A J1 JUNCTION CONNECTOR IE

186 2003 PRIUS (EWD493U)

SYSTEM OUTLINE The radiator fan motor and A/C condenser fan motor operates according to the water temp. SW (Inverter), A/C single pressure SW, and the A/C system condition. The FAN NO.1 relay, FAN NO.2 relay, FAN NO.3 relay are turned on/off, to operate the fan motors at low speed (In series), or high speed (In parallel). 1. LOW SPEED OPERATION When the water temp. SW (Inverter) is on, the radiator fan motor and A/C condenser fan motor operates at low speed. 2. HIGH SPEED OPERATION When the water temp. SW (Inverter) is on, if the A/C system is operating A/C single pressure SW is on, the radiator fan motor and A/C condenser fan motor operates at high speed. SERVICE HINTS A3 A/C SINGLE PRESSURE SW 3–2 : Close above approx. 1520 kpa (15.5 kgf/cm2, 220 psi) Open below approx. 1230 kpa (12.5 kgf/cm2, 178 psi) : PARTS LOCATION Code

See Page

Code

See Page

A1

34

J1

A3

34

A8

36

J27

A

37

E7

36

J28

B

37

J7

Code

See Page

37

R1

35

37

W4

35

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 1A 1J 1K 2G

See Page

Junction Block and Wire Harness (Connector Location)

27

Engine Wire and Engine Room J/B (Engine Compartment Left)

27

Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code IE1

See Page 42

Joining Wire Harness and Wire Harness (Connector Location) Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)

: GROUND POINTS Code IE

See Page 42

Ground Points Location Cowl Side Panel LH

: SPLICE POINTS Code E5

See Page 40

Wire Harness with Splice Points

Code

See Page

Wire Harness with Splice Points

Engine Room Main Wire

187 2003 PRIUS (EWD493U)

AIR CONDITIONING FROM POWER SOURCE SYSTEM (SEE PAGE 50) 1

50A HTR

2

5

5

1

HTR RELAY

4

8 1K

13 1J

5 1A

3 1F

4 1F

LG–R

R

2

B–L

3

L–O

3

B–R

2

CLR MG RELAY

3 1K W–B

1

A (* 1) B (* 2)

J6 JUNCTION CONNECTOR

J2 A ,

A B

LG–R

A B

A (* 1) B (* 2)

JUNCTION CONNECTOR

A A

B–R

A A

J3 B

8 IE1

L–O LG–R B–L

1

13 IE1

M

R

B–R

R B6 BLOWER MOTOR

V

+B

R

3

L–Y

SI

R

GND

3

3

4 W–B

B7 BLOWER MOTOR LINEAR CONTROLLER

1

3 A/C W/P RELAY

1

3

2 W2 WATER PUMP MOTOR (A/C)

M

3

L–Y

W–B

5

W–B

2

4

E5

1 W–B

L

W–B

2

VM

A3 A/C DUAL PRESSURE SW

1

V

B–W

2

L–R

W–B

L–R J1 JUNCTION CONNECTOR A A

IE

188 2003 PRIUS (EWD493U)

A W–B

A

A

A J7 JUNCTION CONNECTOR

W–B

* 1 : W/ DAYTIME RUNNING LIGHT * 2 : W/O DAYTIME RUNNING LIGHT

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

10A HTR

5 2C

R–G

W

A B

L–O

W

1

A12 A/C THERMISTOR

F A

A10 A/C ROOM TEMP. SENSOR

F A

FROM FAN NO. 2 RELAY

C A J27 A

J22 A , J23 B

C A

L–O

FROM CONVERTER

JUNCTION CONNECTOR

R

JUNCTION CONNECTOR

3 2D

R

7. 5A ECU–B

2

2

1

R–G

Y

R–W

W

W

W

W

R

R

B–L

LG–R

LG–R

10 B

1 A

8 A

10 A

1 B

4 C

3 C

1 C

2 C

IG

+B

MGC

IDH

V

RF

TR

SGTR

TE

SGTE

A7 A , A8 B , A9 C A/C AMPLIFIER SGLOCK

2

11

W–B

A A

IE1 8 2D

2 8 2K W–B

A2 A/C MAGNETIC CLUTCH AND LOCK SENSOR

W4 WATER TEMP. SW

L–R

J24 A , J25 B

A B

A B JUNCTION CONNECTOR W–B

4

E A

V–Y

1

W–B

W–B

V–Y

IK1 BR–W

5

W–L

IK1

IE1 J27 A , J28 B

5

B–L

4 L–Y

IE1

GND 7 A

2 B

BR–W

4

20 IE1

W–L

IE1

L–R

15

L–Y

V

21 IE1

CF

18 B

JUNCTION CONNECTOR V–Y

LOCK 9 B

BR–W

V

WP 3 B

V

C (*1) A (*2)

PSW 11 B

W–L

BLW 3 A

L–R

J6 JUNCTION CONNECTOR

L–Y

C (*1) A (*2)

1

A J11 JUNCTION CONNECTOR ID

189 2003 PRIUS (EWD493U)

AIR CONDITIONING

B8 A BODY ECU

HRLY 18

MPX+

MPX–

15 A

16 A

IA2

4

MEO2

13 D

23 C

MPX2

TAM

ACT

3 D

22 D

E2 18 B

E 8 B , E 9 C , E10 D

W–G MPD1

MPX1

2

1

GR–B

LG

P–G

11 A

4 A

4 B

5 B

MPX+

MP2+

NE

2

BR–W

GR

BR

3

14 D

MPD2

ENGINE CONTROL MODULE

MPX–

11 G1 GATEWAY ECU

2 MPX+

C11 COMBINATION METER

GR–L

A6 AMBIENT TEMP. SENSOR

5

W–G

GR

GR–B

L–O

6 2F

IK1

ACT

A7 A , A8 B , A9 C A/C AMPLIFIER

2

1

2

3

4

5

A11 A/C SOLAR SENSOR

W

AIR 21 C

W

AIF 22 C

W

TPI 19 C

W

S5TPI 18 C

W

SGTPI 20 C

W

TS 5 C

W

S5TS 6 C

1

W

M

A14 AIR INLET CONTROL SERVO MOTOR

190 2003 PRIUS (EWD493U)

TSET

MSET

PIG5

PSG

SW A/C

SW F/R

SW RDEF

SW FULL A/C

PIG

LED A/C

LED F/R

LED RDEF

LED FULL A/C

A7 A , A8 B , A9 C A/C AMPLIFIER

3

II1

4

II1

2

II1

W

W

W

W

II1

1

II1

Y–B

5

AOD 11 C

R

II1

AOF 10 C

GR–L

10

W

W

II1

TPM 8 C

BR–W

9

9 C

W

II1

SGTPM

BR–R

7

S5TPM 7 C

L

II1

AMH 13 C

Y–R

8

AMC 14 C

BR–Y

II1

W

W 6

TP 16 C

W

SGTP 15 C

W

S5TP 17 C

W–R

BSET

1

2

3

4

5

1

2

3

4

5

M

M

A15 AIR MIX CONTROL SERVO MOTOR

A16 AIR VENT MODE CONTROL SERVO MOTOR

191 2003 PRIUS (EWD493U)

AIR CONDITIONING FROM POWER SOURCE SYSTEM (SEE PAGE 50) 1

1

30A HTR2

50A HTR3

2

2

1

R–L

R–L

(* 3)

(* 3) 3

3

3

1

3

1

3 HTR1 RELAY

5

3

3

2

3

5

3

3

P–B(* 3) G–R

(* 3)

L–Y(* 3)

(* 3)

P P–B

18 IE1

2

L–R

P

3

HTR2 RELAY

5

3

3

3

HTR3 RELAY 2

3

B–R

G–W

G 3

2 3

3

R–L

8 2G

30A HTR1

(* 3)

10A GAUGE

(* 3)

* 3 : COLD AREA SPEC.

1

13 B 1 A

HTR2

3 B

1 B P3 A , P4 B

A7 A , A8 B , A9 C

PTC HEATER

A/C AMPLIFIER 2 A

4 B

2 B

HTRO

A J1 JUNCTION CONNECTOR

IE

192 2003 PRIUS (EWD493U)

(* 3)

W–B

5 IA1

(* 3)

IA1

W–B

W–B A

(* 3)

W–B

1

W–B

(* 3)

16 IE1

(* 3)

P–B

W–B

6 B

A J11 JUNCTION CONNECTOR

ID

SERVICE HINTS A3 A/C DUAL PRESSURE SW 1–4 : Open with the refrigerant pressure at less than approx. 196 kpa (2.0 kgf/cm2, 28.4 psi), or more than approx. 3140 kpa (32 kgf/cm2, 455 psi), A7 (A), A8 (B), A9 (C) A/C AMPLIFIER (A) 8–GROUND : Always approx. 12 volts (A) 1–GROUND : Approx. 12 volts with the ignition SW at ON position (A) 7–GROUND : Always continuity : PARTS LOCATION Code

See Page

Code

See Page

Code

See Page

A2

34

B6

36

J7

37

A3

34

B7

36

J11

37

A6

34

B8

36

J22

A

37

36

J23

B

37

B

36

J24

A

37

E9

C

36

J25

B

37

E10

D

36

J27

A

37

G1

37

J28

B

37

J1

37

P3

A

37

A

37

P4

B

37

B

37

W2

35

37

W4

35

A7

A

36

A8

B

36

E8

A9

C

36

A10

36

A11

36

A12

36

A14

36

J2

A15

36

J3

A16

36

A C11

J6

: RELAY BLOCKS Code 3

See Page 24

Relay Blocks (Relay Block Location) Engine Room R/B No.3 (Engine Compartment Right)

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 1A

See Page

Junction Block and Wire Harness (Connector Location)

27

Engine Wire and Engine Room J/B (Engine Compartment Left)

27

Engine g Room Main Wire and Engine g Room J/B (Engine ( g Compartment Left))

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

1F 1J 1K 2C 2D 2F 2G 2K

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code IA1

See Page

Joining Wire Harness and Wire Harness (Connector Location)

42

Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)

IE1

42

Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)

II1

44

Instrument Panel Wire and A/C Sub Wire (Instrument Panel Brace LH)

IK1

44

Engine Wire and Engine Room Main Wire (Right Kick Panel)

IA2

: GROUND POINTS Code ID IE

See Page 42

Ground Points Location Cowl Side Panel LH

193 2003 PRIUS (EWD493U)

AIR CONDITIONING : SPLICE POINTS Code E5

See Page 40

Wire Harness with Splice Points

Code

Engine Room Main Wire

194 2003 PRIUS (EWD493U)

See Page

Wire Harness with Splice Points

MEMO

195 2003 PRIUS (EWD493U)

I GROUND POINT

W–B

W–B

W–B

FRONT SIDE MARKER LIGHT RH

W–B

FRONT TURN SIGNAL LIGHT RH

W–B

BRAKE FLUID LEVEL WARNING SW

W–B

W–B

W–B

W–B

W–B

W–B

W–B

A

E1

W–B

A

E1

W–B

E1 W–B

EC

IGNITION COIL AND IGNITER NO. 2

W–B

IGNITION COIL AND IGNITER NO. 3

W–B

IGNITION COIL AND IGNITER NO. 4

W–B

W–B

A

A

W–B

A

A

W–B

J8 A ,

E3

BR

E3

COMBINATION METER

(ES)

14 IO1

BR

W–B W–B

W–B

7 2A

14 ID2

BR

(E1)

ENGINE CONTROL MODULE

(SG)

DATA LINK CONNECTOR 3

(E01) ENGINE CONTROL MODULE (E02)

EB

BR

W–B

L

BLOWER MOTOR LINEAR CONTROLLER

BR

W–B

E3

(*2) (E1)

PTC HEATER

J9 B

JUNCTION CONNECTOR A A B A

EA

AIRBAG SENSOR ASSEMBLY

(GND2)

IE

W–B

(E03)

(GND1) BRAKE ECU

J1 JUNCTION CONNECTOR

E1

W–B

W–B

(ME01)

INVERTER

(* 1)

IGNITION COIL AND IGNITER NO. 1

ENGINE CONTROL MODULE

HYDRAULIC BOOSTER

A

W–B

3

RADIATOR FAN MOTOR

W–B

W–B

DRL RELAY

W–B

E1

W–B

WATER TEMP. SW

W–B

W–B

FRONT TURN SIGNAL LIGHT LH

W–B

FRONT SIDE MARKER LIGHT LH

FRONT WIPER MOTOR

W–B

E5

A

W–B

W–B

W–B

E1

ENGINE HOOD COURTESY SW

W–B

E5

W–B

FRONT PARKING LIGHT RH

J7 JUNCTION CONNECTOR

E5

W–B

W–B

W–B

E5

W–B

FRONT PARKING LIGHT LH

HTR RELAY

E5

E5

W–B

W–B

IG2 RELAY

EFI RELAY

E5

W–B

WATER PUMP MOTOR (A/C)

3 1K

E5

W–B

HYDRAULIC BOOSTER

W–B

E5

E5

W–B

(CUT–)

W–B

A

W–B

A/C TRIPLE PRESSURE SW

A

W–B

(–S)

W–B

E5 W–B

2

IGCT RELAY

FAN NO. 2 RELAY

BR

WATER PUMP MOTOR (INVERTER)

21 IJ1

BR (*2) BR

6 2B

BR

BR

IH

IF

196 2003 PRIUS (EWD493U)

NAVIGATION ECU

RADIO AND PLAYER

MULTI DISPLAY

HYBRID VEHICLE CONTROL ECU

(EOM)

KEY INTERLOCK SOLENOID

(KLS–)

W–B

E

E

W–B

W–B

E

E

W–B

W–B

E

J21 JUNCTION CONNECTOR

LIGHT CONTROL RHEOSTAT

(E)

(CG)

GATEWAY ECU

* 1 : W/ DAYTIME RUNNING LIGHT * 2 : W/ NAVIGATION SYSTEM

J22 A , J23 B JUNCTION CONNECTOR D E B A

W–B

HAZARD WARNING SW

W–B

W–B

WIRELESS DOOR CONTROL RECEIVER

E A

D B

E A

W–B

A B

A A

W–B

A B

A A

W–B

W–B

A B

A A

W–B

W–B

A B

A A

W–B

A B

A A

11 IJ1

W–B

W–B

BUCKLE SW AND TENSION REDUCER LH

PARK/NEUTRAL POSITION SW

D B

W–B

(TL)

W–B

A/C AMPLIFIER

UNLOCK WARNING SW

(UN–)

REMOTE CONTROL MIRROR SW

SHIFT LOCK ECU

BUCKLE SW RH AND SEAT BELT WARNING OCCUPANT DETECTION SENSOR

W–B

10 IJ1

W–B

2 IG1

W–B

W–B

(E2)

(CG)

DATA LINK CONNECTOR 3

DOOR LOCK MOTOR, DOOR KEY LOCK AND UNLOCK SW AND DOOR UNLOCK DETECTION SW FRONT LH

W–B

J24 A , J25 B

AIRBAG SENSOR ASSEMBLY

GATEWAY ECU

CIGARETTE LIGHTER

JUNCTION CONNECTOR

A A

(GND)

(E)

BODY ECU

W–B

8 2D

IG1 RELAY

W–B

3 2E

ACC RELAY

W–B

8 2K

W–B

W–B

TRANSPONDER KEY COMPUTER POWER WINDOW MASTER SW

(E)

A

1 IC1

W–B

W–B

5 IA1

W–B

A

W–B

1 IA1

W–B

A

A

J11 JUNCTION CONNECTOR

FUEL PUMP

W–B

A

W–B

1 BB1

A

W–B

1 IQ1

J17 JUNCTION CONNECTOR

W–B

DAYTIME RUNNING LIGHT RELAY

W–B

A

W–B

PTC HEATER (E)

A

W–B

J10 JUNCTION CONNECTOR A W–B A W–B

W–B

EMPS ECU

B3

W–B

POWER WINDOW CONTROL SW REAR RH

W–B

DOOR LOCK MOTOR AND DOOR UNLOCK DETECTION SW REAR RH

(* 1) (GND3)

W–B

A

W–B

POWER WINDOW CONTROL SW FRONT RH

BRAKE ECU (GND4)

A

W–B

ID

W–B

A

A

IG

W–B

W–B

(EL)

COMBINATION SW W–B

197 2003 PRIUS (EWD493U)

I GROUND POINT

REAR COMBINATION LIGHT LH

W–B

C B

B A

W–B

LICENSE PLATE LIGHT LH

W–B

C B

B A

W–B

HIGH MOUNTED STOP LIGHT

W–B

C B

B A

REAR COMBINATION LIGHT RH

W–B

LICENSE PLATE LIGHT RH

W–B

1 BA1 W–B

W–B

PERSONAL LIGHT

B1

W–B

POWER WINDOW CONTROL SW REAR LH

W–B

DOOR LOCK MOTOR AND DOOR UNLOCK DETECTION SW REAR LH

BI

W–B

BK

W–B

W–B

J32 A , J33 B JUNCTION CONNECTOR

BATTERY MOTOR BLOWER CONTROLLER

SYSTEM MAIN RELAY

LUGGAGE COMPARTMENT DOOR UNLOCK SW

W–B

B B

W–B

B B

W–B

BATTERY ECU

W–B

(E)

COMBINATION SW

(E)

TURN SIGNAL FLASHER RELAY

W–B

W–B

C A

W–B

BATTERY FAN RELAY

BATTERY INPUT RELAY

J32 A , J33 B

BJ

COMBINATION SW

B B

C A

JUNCTION CONNECTOR

W–B

A A

A B

W–B

7 IQ1

W–B

W–B

A A

A B

W–B

2 IQ1

W–B

W–B

A A

A B

W–B

W–B

A A W–B

A A J18 A , J19 B JUNCTION CONNECTOR

W–B

8 BC1

BL

W–B

198 2003 PRIUS (EWD493U)

DOOR LOCK MOTOR, DOOR KEY LOCK AND UNLOCK SW AND DOOR UNLOCK DETECTION SW FRONT RH DOOR LOCK CONTROL SW FRONT RH

(ECC)

W–B

B A

C B

W–B

C B

W–B

J18 A , J19 B JUNCTION CONNECTOR

COMBINATION SW

(GND1) HYBRID VEHICLE CONTROL ECU (GND2)

: PARTS LOCATION Code

See Page

J1

Code

37

J7

See Page

J17

Code

See Page

37

J24

A

37

37

J18

A

37

J25

B

37

J8

A

37

J19

B

37

J32

A

38

J9

B

37

37

J33

B

38

J21

J10

37

J22

A

37

J11

37

J23

B

37

: RELAY BLOCKS Code

See Page

Relay Blocks (Relay Block Location)

2

23

Engine Room R/B No.2 (Right Side of Reserve Tank)

3

24

Engine Room R/B No.3 (Engine Compartment Right)

,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR ,,, ,,, Code 1K

See Page

Junction Block and Wire Harness (Connector Location)

27

Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

30

Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

31

Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

2A 2B 2D 2E 2K

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code

See Page

Joining Wire Harness and Wire Harness (Connector Location)

IA1

42

Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)

IC1

42

Front Door LH Wire and Cowl Wire (Left Kick Panel)

ID2

42

Instrument Panel Wire and Cowl Wire (Left Kick Panel)

IG1

42

Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)

IJ1

44

Floor No.3 Wire and Instrument Panel Wire (Under the Instrument Panel Center)

IO1

44

Engine Wire and Cowl Wire (Right Kick Panel)

IQ1

44

Front Door RH Wire and Cowl Wire (Right Kick Panel)

BA1

46

Rear Door No.2 Wire and Floor Wire (Center Pillar LH)

BB1

46

Rear Door No.1 Wire and Cowl Wire (Center Pillar RH)

BC1

46

Cowl Wire and Fuel Tank Wire (Near the Fuel Tank)

: GROUND POINTS Code EA EB EC ID IE

See Page

Ground Points Location

40

Engine Block

40

Engine Compartment Left

42

Cowl Side Panel LH

IF

42

Left Kick Panel

IG

42

Cowl Side Panel RH

IH

42

Right Kick Panel

BI

46

Left Side of Rear Pillar

BJ

46

Right Side of Rear Pillar

BK

46

Back Panel Center

BL

46

Near the Fuel Tank

199 2003 PRIUS (EWD493U)

I GROUND POINT : SPLICE POINTS Code

See Page

Wire Harness with Splice Points

Code

See Page

Wire Harness with Splice Points

E1

40

Engine Room Main Wire

B1

46

Rear Door No.2 Wire

E3

40

Engine Wire

B3

46

Rear Door No.1 Wire

E5

40

Engine Room Main Wire

200 2003 PRIUS (EWD493U)

MEMO

201 2003 PRIUS (EWD493U)

J POWER SOURCE (Current Flow Chart)

202 2003 PRIUS (EWD493U)

J

203 2003 PRIUS (EWD493U)

J POWER SOURCE (Current Flow Chart) Fusible Link Block No.1 (See Page 22) Fuse

100A

DC/DC

System

Page

Illumination Key Reminder and Light Reminder Buzzer Light Auto Turn Off Taillight

92 114 104 88

TOYOTA Hybrid System

54

Fusible Link Block No.2 (See Page 23) Fuse 5A

120A

DC/DC–S

MAIN

System

Page

TOYOTA Hybrid System

54

ABS Engine Control Headlight (w/o Daytime Running Light) Hybrid Vehicle Immobiliser System

172 68 84 78

Illumination Key Reminder and Light Reminder Buzzer Light Auto Turn Off SRS

92 114 104 167

Taillight TOYOTA Hybrid System

88 54

Engine Room R/B No.3 (See Page 24) Fuse

System

Page

7.5A

DRL

Headlight (w/ Daytime Running Light)

80

10A

ABS NO.4

ABS

172

30A

HTR1

Air Conditioning

188

30A

HTR2

Air Conditioning

188

40A

ABS NO.1

ABS

172

50A

EMPS

EMPS

164

50A

HTR3

Air Conditioning

188

Engine Room J/B (See Page 26) Fuse

System

Page

10A

BATT FAN

TOYOTA Hybrid System

54

10A

HEAD (LH)

Headlight (w/o Daytime Running Light)

84

10A

HEAD (RH)

Headlight (w/o Daytime Running Light)

84

10A

HEAD HI (LH)

Headlight (w/ Daytime Running Light)

80

10A

HEAD HI (RH)

Headlight (w/ Daytime Running Light)

80

10A

HEAD LO (LH)

Headlight (w/ Daytime Running Light)

80

10A

HEAD LO (RH)

Headlight (w/ Daytime Running Light)

80

10A

HORN

Horn Theft Deterrent

124 146

10A

TURN–HAZ

Turn Signal and Hazard Warning Light

96

∗ These are the page numbers of the first page on which the related system is shown.

204 2003 PRIUS (EWD493U)

J Fuse

15A

15A

AM2

DOME

System

Page

ABS Engine Control Hybrid Vehicle Immobiliser System SRS

172 68 78 167

TOYOTA Hybrid System

54

Combination Meter Door Lock Control Headlight (w/ Daytime Running Light) Headlight (w/o Daytime Running Light)

182 134 80 84

Illumination Interior Light Key Reminder and Light Reminder Buzzer Navigation System

92 108 114 156

Power Window Radio and Player Seat Belt Warning Theft Deterrent

126 152 118 146

TOYOTA Hybrid System Wireless Door Lock Control

54 140

15A

EFI

Engine Control

68

15A

THRO

Engine Control

68

20A

ABS NO.3

ABS

172

20A

HV

TOYOTA Hybrid System

54

30A

ABS NO.2

ABS

172

30A

CDS FAN

Radiator Fan and Condenser Fan

186

30A

HEAD

Headlight (w/ Daytime Running Light) Key Reminder and Light Reminder Buzzer Light Auto Turn Off

80 114 104

30A

RDI

Radiator Fan and Condenser Fan

186

50A

HTR

Air Conditioning

188

Instrument Panel J/B (See Page 30) Fuse

5A

ECU–IG

System

Page

ABS Electric Tension Reducer EMPS Gateway System

172 162 164 160

Navigation System Radiator Fan and Condenser Fan Shift Lock

156 186 132

5A

PANEL

Illumination

92

7.5A

ECU–B

Air Conditioning Combination Meter

188 182

∗ These are the page numbers of the first page on which the related system is shown.

205 2003 PRIUS (EWD493U)

J POWER SOURCE (Current Flow Chart) Fuse

7.5A

7.5A

7.5A

10A

10A

System

Page

Door Lock Control EMPS Gateway System Headlight (w/ Daytime Running Light)

134 164 160 80

Hybrid Vehicle Immobiliser System Interior Light Key Reminder and Light Reminder Buzzer Light Auto Turn Off

78 108 114 104

Power Window Theft Deterrent Wireless Door Lock Control

126 146 140

OBDII

Engine Control Theft Deterrent

68 146

TAIL

Key Reminder and Light Reminder Buzzer Light Auto Turn Off Taillight

114 104 88

Combination Meter Gateway System Navigation System Radio and Player

182 160 156 152

Remote Control Mirror Shift Lock SRS

130 132 167

ABS Air Conditioning Back–Up Light Combination Meter

172 188 102 182

Door Lock Control EMPS Engine Control Headlight (w/ Daytime Running Light)

134 164 68 80

Key Reminder and Light Reminder Buzzer Light Auto Turn Off Navigation System Power Window

114 104 156 126

Rear Window Defogger Seat Belt Warning Theft Deterrent TOYOTA Hybrid System

180 118 146 54

Turn Signal and Hazard Warning Light Wireless Door Lock Control

96 140

ECU–B

ACC

GAUGE

10A

HTR

Air Conditioning

188

10A

SRS ACC

SRS

167

∗ These are the page numbers of the first page on which the related system is shown.

206 2003 PRIUS (EWD493U)

J Fuse 15A

System

Page

CIG

Cigarette Lighter

122

15A

STOP

ABS Engine Control Shift Lock Stop Light

172 68 132 100

15A

WASHER

Wiper and Washer

120

20A

PWR1

Power Window

126

30A

DOOR

Door Lock Control Theft Deterrent Wireless Door Lock Control

134 146 140

30A

POWER

Power Window

126

30A

WIPER

Wiper and Washer

120

40A

DEF

Rear Window Defogger

180

∗ These are the page numbers of the first page on which the related system is shown.

207 2003 PRIUS (EWD493U)

K CONNECTOR LIST A1

A2

A3

A4

A5

A6

BLACK

GRAY

BLACK

GRAY

GRAY

BLACK

1

1

1

2

1 2 3 4

2

A7

1 4

A8

1 2 3 4 5 6 7 8 9

8 9 10 11 12 13 14

10 11 12 13 14 15 16 17 18

A12

1 2

1 2 3 4 5 6 7 8 9 1011 1213141516171819 202122

A13

1 4

1 2

A16

1 2

A10

A14

A15

BLACK

1 2

2

A9

1 2 3 4 5 6 7

A11

2

3

2 5

BLACK

3 6

1 2 3 4 5

1 2 3 4 5

A17

A18

A19

A20

YELLOW

YELLOW

YELLOW

YELLOW

A

B

1 2 3 4 5

1 2 3 1 2 3 4 5 6

A21

A22 BLACK

B 1 2

4 5 6 1 2 3 4 5 6

7 8 9 1011121314151617

7 8 9 101112

7 8 9 101112

YELLOW

A

A B

1819 2021 22 23 2425 26 27 28

A23

A24

B1

B2

GRAY

BLACK

1 2 3 4

1

1 2 1

2 1

2

2 1

5 6 7 8

2

9 10 11 12

B3

B4

B5

BLACK

GRAY

BROWN

1 1 2

3 4

7 8

9 10 11 12

5 6

B6

1

3 5

2 1

B7 BLACK

2 2

208 2003 PRIUS (EWD493U)

1

2

3

4

3

K B8

B9

1 2 3 4 5 6 7 8 9 10 11 1213141516171819 20

B10

1 2 3 4 5 6 7 8 9 1 2

10 11 12 13 14 15 16 17 18

3 4 5 6 7 8 9

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

B11

B12

BLACK

27 28

29 30 31

B13

B14

BLACK

BLACK

1 2 3 4 5 6 7

1 2

1 2 3 4 5 6

7 8 9

1 2 3 4 5

6 7

8 9 10 11 12 13 14 15 16

10 11 12 13 14 15 16 17 18 19

8 9 10 11 12 13 14 15

17 18 19 20 21

20 21 22

16 17

22 23 24

B15

23 24 25 26 27 28

B16

18 19 20 21 22

B17

B18

B19 BROWN

BLACK

1

2

3

4

1

3 5

1 2 3 4 5 6 7 8 9 10 11

1 2 3 4 5 6

12 13 14 15 16 17 18 19 20 21 22

7 8 9 10 11 12

1

2

2

B20

B21 1

1 2 3

B22

C1

C2

BLACK

BLACK

BLACK

1 2

1 2

2

3

1 2 3 4

5

6

C3

C4

C5

C6

YELLOW

GRAY

GRAY

BLACK

1 2 3 4

1

1

C8

2

C7

1 2

C10

1

C11

3 4

5 6 7 8 9 10

2

C12 BLACK

1 2 1 2 3 4 5 6 7 8 9 1011 1213141516171819 202122

1 2 3 4 5

1 2 3 4 5 6 7 8 9

6 7 8 9 10

10 11 12 131415 16 17 18

209 2003 PRIUS (EWD493U)

K CONNECTOR LIST C13

C14

D1 GRAY

2 1

2

3

4 5 6 7

8

1

1 2 3 4 5 6

9 10 1112131415 16 17

D2

D3

D4

D5

BLACK

BLACK

1 2 3

1 2

3 4 5 6 7 8 9 10 11 1 16 15 14 13 12 11 10 9

2 12 13 14 15 16 17 18 19 20

8 7 6 5 4 3 2 1

D6

D7

1

D8

1

D9

1

1

D10

D11

BLACK

BLACK

1

2

1 2 3 4

3 4 5 6

D12

D13

D14

E1

BLACK

BLACK

BLACK

DARK GRAY

1 2 3 4

1 2 3 4 5 6

1 2

E3

1 2 3 4 5 6

E4

E5

1 2

E6

E7

GRAY

1 2 3 4 5 6

E2

1

2

1

2

BLACK

1 2 3 4 5 6 7 8 9 10

1 2

3 4 5 6 7 8 9

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

210 2003 PRIUS (EWD493U)

27 28

29 30 31

K E8

E9

E10

F1

BLACK

BLACK

BLACK

YELLOW

1 3 4 5 6 7

1 2

1 2 3 4 5 6

7 8 9

1 2 3 4 5

6 7

8 9 10 11 12 13 14 15 16

10 11 12 13 14 15 16 17 18 19

8 9 10 11 12 13 14 15

17 18 19 20 21

20 21 22

16 17

22 23 24

23 24 25 26 27 28

2

18 19 20 21 22

F2

F3

F4

F5

F6

F7

YELLOW

GRAY

GRAY

BLACK

BLACK

GRAY

1 2

1 2

1 2

1 2

1

2

1

F8

F9

GRAY

GRAY

1

F10

F11

F12

(See Page 22)

(See Page 22)

(See Page 22)

2

1 2 3

2

4 5

F13

F14

F15

F16

BLACK

F17

F18

GRAY

1

1

1

2

2

BLACK

1

2

3

4

5

6

7

8

1

2 1

G1

H1

H2

H3

H4

GRAY

GRAY

GRAY

DARK GRAY

BLACK

1

1

2

1 2 3 4 5 6 7

3

2

1 3

1

2

3

4

8 9 10 11 12 13 14

H5

H6

BLACK

GRAY

1

2

3

4

5

6

1

2

3 4 5

H7

H8

H9 DARK GRAY

1 2 3 4 5

1 2 3 4 5

1

2

3

4

211 2003 PRIUS (EWD493U)

K CONNECTOR LIST H10

H11

H12

H13

BLACK

1 2 3 4 5

1 2 3 4 5 6

1 2

10 11 12 13 14 15 16 17 18 19

7 8 9 10 11 12

8 9 10 11 12 13 14 15 16

13 14 15

17 18 19 20 21

1 2 3 4 5 6

18 19 20 21 22

16 17

7 8 9

6 7

8 9 10 11 12 13 14 15

BLACK

23 24 25 26 27 28

20 21 22

H14

H15

16 17

H16

3 4 5 6 7

22 23 24

H17 1

1

2 1 1 2

3 4 5 6 7 8 9

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

27 28

29 30 31

I1

I2

I3

I4

I5

BLACK

GRAY

BLACK

GRAY

BLACK

1 2 3 4

1 2 3 4

1 2 3 4

1 2

1 2 3 4

I6

I7

I8

I9

I10

GRAY

BLACK

GRAY

GRAY

GRAY

1 2

1 2

1 2 3 4 5 6

1 2 3 4

1 2

I11

I12

I13

GRAY

GRAY

ORANGE

1 2 3 4 5 6

1 2 3 4

1

5 6 7 8

I14

I15

ORANGE

1

5 6 7 8

I16

I17

J1

J2

J3

1

2

3

4

5

6

7

8

J4

BLACK

1 2

12

A A

A A

A

A

A B

A B

212 2003 PRIUS (EWD493U)

A B

A B

A A B B C C D D E E F F

K J5

A A B B C C

J6

J6

J7

(w/ Daytime Running Light)

(w/o Daytime Running Light)

BLUE

A A B C C A A B B B B C C

A B A A B B B

A A A A A A A A A A A A

D D E E F F

J8

J9

J10

GRAY

GRAY

BLACK

J11

A A A A A A A A A A

A A A A A A

B B B C C C

B B B C C C

J13

A A

J12

A A

A

A A B B C C

A

D D E E F F

J14

J15

BLACK

BLACK

A A B B C C

A A B B C C

A A B B C C

A A A B B B C C C C C

D D E E F F

D D D E E E

D D D E E E

D D D D E E E E E E E

J17

A A

J16

J18

J19

GRAY

GRAY

J20

A A A A A A

A A A A A A

A A A B B B C C C C C

B B B C C C

B B B C C C

D D D D E E E E E E E

A A

A

A

J21

J22

J23

J24

BLACK

BLACK

GRAY

A A A B B B C C C C C

A A B B C C

A A B B C C

A A A A A A

D D D D E E E E E E E

D D D E E E

D D D E E E

B B B C C C

J25

J26

J27

GRAY

BLUE

A A A A A A

A A A B B B B C C C C

A A B B C C C D D E E

B B B C C C

D D D E E E E F F F F

F F F F G G G H H H H

213 2003 PRIUS (EWD493U)

K CONNECTOR LIST J28

J29

J30

J31

BLUE

BLACK

BLACK

BLACK

A A B B C C C D D E E

A A B B C C

A A B B C C

F F F F G G G H H H H

D D D E E E

D D D E E E

A A A A

L1

J32

J33

K1

GRAY

GRAY

DARK GRAY

A A A A A A

A A A A A A

B B B C C C

B B B C C C

1

1

L3

L4

1

2

2

3 4 5 6

L5

L6

M1

GRAY 1

L2 GRAY

BLACK

2

1

1 2

2

1

1 2 3 4 5

M2

M3

M4

GRAY

GRAY

GRAY

1 2 3 4 5 6

1 2 3

1

2

3

4

5

6

7

8

9 10

1 2 3 4 5 6 7 8 9 10 11 12 13 14

M6

M7

N1

BLUE

BLUE

GRAY

12 3 456 7 8 1 2 3 4 5

1 2

6 7 8 9 10

N4

M5

O1

P1

N2

N3

1 2 3 4 5 6 7 8 9

1 2 3 4 5

10 11 12 13 14 15 16 17 18

6 7 8 9 10

P2

P3

P4

BLACK 1 1 2 1

1

P5

3

4 5 6 7 8 9

P6

1

P7

P8

GRAY

1 2

1

2

3 4 5 6

1

2

3 4 5 6

1

2

3 4 5 6

214 2003 PRIUS (EWD493U)

2

1

2

3

4

K P9

P10

BLUE

BLACK

P11

P12

P13

1 2

1 2

1 2

1 2 1 2 3 4

8

5 6 7

3 4

9 10 11 12 13 14 15 16 17 18 19 20

P14 YELLOW

5 6

P15

R1

YELLOW

BLACK

R2

1 2

1 1

2

2

R5

1 2 3 4 5 6 7 8 9 101112 1 2 3 4 5 6 7 8 9 10

R10

1 2

3 4 5 6

1 2

R4

R3

R11

R6

R7

1 2

1 2

3 4 5 6

S1

3 4

5 6 7 8 9 10

R8

R9

3 4

1

1

5 6

2

2

S2

S3

S4

GRAY

2 1

2 1

4 3

4 3

6 5

6 5

YELLOW 1 2 3 4 5 6

1 2 3 4

S5

S6

S7

YELLOW

YELLOW

YELLOW

1 3

S8

1 2 3 4

2 4

S9 1

1 2 3 4

1 2

S10

1 2 3 4 5 6 7

1 2

S11

S12

T1

T2

BLACK

BLACK

1 1

1

1 1 2

T3

T4

T5

BLACK

1234

T6

U1

BLACK

1 2

3 4

12 3 456 78

5 6 7 8 9 10 11 12

12

1 2 3 4

215 2003 PRIUS (EWD493U)

K CONNECTOR LIST V1

V2

V3

V4

V5

BLACK

BLUE

BROWN

BLACK

BLACK

1 2 3

1

1 2 3 2

1

2

1

V6

W1

W2

W3

W4

BLUE

BLACK

BLACK

GRAY

DARK GRAY

1

1 2 3

2

1 2

1

216 2003 PRIUS (EWD493U)

2

1 2

2

W5

1 2 3 4 5

MEMO

217 2003 PRIUS (EWD493U)

L PART NUMBER OF CONNECTORS Code

Part Name

Part Number

Code

Part Name

Part Number

B20

Buckle SW and Tension Reducer LH

B21

Buckle SW RH and Seat Belt Warning Occupant Detection Sensor

90980–11471

B22

Battery Input Relay

90980–12199

C1

Camshaft Position Sensor

90980–10947

C2

Camshaft Timing Oil Control Valve

90980–11162

90980–11070

C3

Circuit Breaker Sensor

90980–11898

A1

A/C Condenser Fan Motor

90980–11237

A2

A/C Magnetic Clutch and Lock Sensor

90980–10942

A3

A/C Triple Pressure SW (A/C Dual and Single Pressure SW)

90980–10943

A4

ABS Speed Sensor Front LH

A5

ABS Speed Sensor Front RH

A6

Ambient Temp. Sensor

A7

A/C Amplifier

90980–11911

C4

Converter

90980–10942

A8

A/C Amplifier

90980–11913

C5

Converter

90980–11963

90980–11927

C6

Crankshaft Position Sensor

90980–12028

C7

Center Cluster SW

90980–10801

C8

Cigarette Lighter

90980–10760

90980–11003

A9

A/C Amplifier

A10

A/C Room Temp. Sensor

A11

A/C Solar Sensor

A12

A/C Thermistor

C10

Combination Meter

90980–11927

A13

Accel Position Sensor

90980–11144

C11

Combination Meter

90980–11923

A14

Air Inlet Control Servo Motor

90980–11921

C12

Combination SW

90980–11594

A15

Air Mix Control Servo Motor

C13

Combination SW

90980–11672

A16

Air Vent Mode Control Servo Motor

C14

Combination SW

90980–11616

A17

Airbag Sensor Assembly

90980–11869

D1

DC Motor

90980–10838

A18

Airbag Sensor Assembly

90980–11872

D2

Data Link Connector 3

90980–11665

A19

Airbag Sensor Assembly

90980–11867

D3

Daytime Running Light Relay

90980–12034

A20

Airbag Squib (Front Passenger Airbag Assembly)

90980–11884

D4

Diode (Door Courtesy)

90980–11251

D5

Diode (Daytime Running Light)

90980–10962

A21

Airbag Squib (Steering Wheel Pad)

90980–10850

D6

Door Courtesy SW Front LH

A22

Ashtray Illumination

90980–12111

D7

Door Courtesy SW Front RH

A23

ABS Speed Sensor Rear LH

D8

Door Courtesy SW Rear LH

90980–11919

90980–11909

90980–11060

A24

ABS Speed Sensor Rear RH

B1

Brake Actuator

90980–11087

B2

Brake Actuator

90980–11161

B3

Brake Actuator

90980–11698

B4

Brake Fluid Level Warning SW

90980–11207

B5

Back–Up Light Relay

82660–20340

B6

Blower Motor

90980–10214

B7

Blower Motor Linear Controller

90980–11676

B8

Body ECU

90980–11971

B9

Body ECU

90980–11973

B10

Brake ECU

B11

90980–10871

D9

Door Courtesy SW Rear RH

D10

Door Lock Control SW Front RH

D11

Door Lock Motor and Door Unlock Detection SW Rear LH

D12

Door Lock Motor and Door Unlock Detection SW Rear RH

D13

Door Lock Motor, Door Key Lock and Unlock SW and Door Unlock Detection SW Front LH

D14

Door Lock Motor, Door Key Lock and Unlock SW and Door Unlock Detection SW Front RH

90980–11935

E1

Engine Coolant Temp. Sensor

Brake ECU

90980–11476

E2

Engine Hood Courtesy SW

90980–11189

B12

Brake ECU

90980–11637

E3

EMPS ECU

90980–12012

B13

Brake ECU

90980–11638

E4

EMPS ECU

90980–11579

B14

Brake Warning Buzzer

90980–10906

E5

EMPS ECU

90980–12120

B15

Battery Blower Motor

82824–47130

E6

EMPS ECU

90980–11923

B16

Battery Blower Motor Controller

90980–11676

E7

Engine Control Module

90980–11421

B17

Battery ECU

90980–11392

E8

Engine Control Module

90980–11476

B18

Battery ECU

90980–11424

E9

Engine Control Module

90980–11637

B19

Battery Fan Relay

82660–20340

Note: Not all of the above part numbers of the connector are established for the supply.

218 2003 PRIUS (EWD493U)

90980–10797

90980–11150

90980–11858

90980–10737

L Code

Part Name

E10

Engine Control Module

F1

Front Airbag Sensor LH

F2

Front Airbag Sensor RH

F3

Front Parking Light LH

F4

Front Parking Light RH

Part Number

Code

90980–11638

I10

Inverter

90980–10891

I11

Inverter

90980–10988

I12

Inverter

90980–10897

I13

Inverter

90980–11943

I14

Inverter

90980–11944

I15

Ignition SW

90980–11615

I16

Interior Light

90980–10860

I17

Interlock SW

90980–11918

J1

Junction Connector

90980–10976

J2

Junction Connector

J3

Junction Connector

J4

Junction Connector

J5

Junction Connector

90980–11856

90980–11162

F5

Front Side Marker Light LH

F6

Front Side Marker Light RH

F7

Front Turn Signal Light LH

F8

Front Turn Signal Light RH

F9

Front Wiper Motor

F10

Fusible Link Block No.1

F11

Fusible Link Block No.1

F12

Fusible Link Block No.1

F13

Fusible Link Block No.1

F14

Front Door Speaker LH

F15

Front Door Speaker RH

F16

Fuel Pump and Fuel Sender

82824–47160

F17

Fusible Link Block No.2

90980–10916

F18

Fusible Link Block No.2

90980–11775

G1

Gateway ECU

90980–11911

H1

Headlight LH

H2

Headlight RH

H3

Heated Oxygen Sensor (Bank 1 Sensor1)

90980–11028

H4

Horn

90980–10619

H5

Hydraulic Booster

90980–10939

H6

Hydraulic Booster

90980–10946

H7

Hazard Warning SW

90980–11319

H8

Hazard Warning SW

90980–11921

H9

Heated Oxygen Sensor (Bank 1 Sensor 2)

90980–11028

H10

Hybrid Vehicle Control ECU

90980–11638

H11

Hybrid Vehicle Control ECU

90980–11637

H12

Hybrid Vehicle Control ECU

90980–11586

H13

Hybrid Vehicle Control ECU

90980–11476

H14

Hybrid Vehicle Control ECU

90980–11421

H15

High Mounted Stop Light

90980–11060

H16

Hybrid Vehicle Battery

H17

Hybrid Vehicle Battery

I1

Ignition Coil and Igniter No.1

I2

Ignition Coil and Igniter No.2

I3

Ignition Coil and Igniter No.3

I4

Ignition Coil and Igniter No.4

I5

Injector No.1

I6

Injector No.2

I7

Injector No.3

I8

Injector No.4

I9

Inverter

90980–11019 90980–11599

–

90980–11775 90980–10935

90980–11314

–

90980–11885

90980–11875

Part Name

Part Number

90980–11742

90980–11661

Junction Connector (w/ Daytime Running Light)

90980–11542

Junction Connector (w/o Daytime Running Light)

90980–11529

J7

Junction Connector

90980–10803

J8

Junction Connector

J9

Junction Connector

J10

Junction Connector

90980–11398 90980–10976

J6

90980–11661

J11

Junction Connector

J12

Junction Connector

J13

Junction Connector

J14

Junction Connector

J15

Junction Connector

J16

Junction Connector

90980–11915

J17

Junction Connector

90980–10976

J18

Junction Connector

J19

Junction Connector

J20

Junction Connector

J21

Junction Connector

J22

Junction Connector

J23

Junction Connector

J24

Junction Connector

J25

Junction Connector

J26

Junction Connector

J27

Junction Connector

J28

Junction Connector

J29

Junction Connector

J30

Junction Connector

J31

Junction Connector

J32

Junction Connector

J33

Junction Connector

K1

Knock Sensor

90980–11166

L1

Light Control Rheostat

90980–10797

90980–11661

90980–11661

90980–11915

90980–11661

90980–11915

90980–11398

90980–11661

90980–11034

219 2003 PRIUS (EWD493U)

L PART NUMBER OF CONNECTORS Code

Part Name

L2

License Plate Light LH

L3

License Plate Light RH

L4

Luggage Compartment Door Unlock SW

L5

Luggage Compartment Light

L6

Part Number

Code

Part Name

Part Number

S4

Side Airbag Sensor LH

S5

Side Airbag Sensor RH

90980–11212

S6

Side Airbag Squib LH

90980–11148

S7

Side Airbag Squib RH

Luggage Compartment Light SW

90980–11097

S8

System Main Relay

M1

Mass Air Flow Meter

90980–11317

S9

System Main Relay

M2

Motor Generator No.1

90980–11658

S10

System Main Relay

M3

Motor Generator No.2

90980–11034

S11

System Main Relay

M4

Motor Generator No.2

90980–11143

S12

System Main Relay

M5

Multi Display

90980–11911

T1

Theft Deterrent Horn

M6

Multi Display

90980–11923

T2

Throttle Control Motor

90980–11162

M7

Multi Display

90980–10799

T3

Throttle Position Sensor

90980–10711

N1

Noise Filter (Ignition)

90980–10843

T4

Transponder Key Computer

90980–11475

N2

Navigation ECU

90980–11973

T5

Turn Signal Flasher Relay

90980–10799

N3

Navigation ECU

90980–11923

T6

Tension Reducer Solenoid

90980–11918

U1

Unlock Warning SW and Key Interlock Solenoid

90980–10795

V1

Vacuum Sensor (HC Adsorber and Catalyst System)

90980–10845

V2

VSV (EVAP)

90980–11156

V3

VSV (HC Adsorber and Catalyst System)

90980–11149

V4

Vapor Pressure Sensor

90980–11143

V5

VSV (Canister Closed Valve)

90980–11156

V6

VSV (Parge Flow Switching Valve)

90980–11859

W1

Washer Motor

90980–10981

W2

Water Pump Motor (A/C)

90980–10887

W3

Water Pump Motor (Inverter)

90980–11003

W4

Water Temp. SW

90980–11235

W5

Wireless Door Control Receiver

90980–11909

90980–11148

N4

Noise Filter (Rear Window Defogger)

90980–11259

O1

Oil Pressure SW

90980–11363

P1

Park/Neutral Position SW

90980–11535

P2

Parking Brake SW

90980–11147

P3

PTC Heater

90980–10903

P4

PTC Heater

90980–10867

P5

Personal Light

90980–11212

P6

Power Window Control SW Front RH

P7

Power Window Control SW Rear LH

P8

Power Window Control SW Rear RH

P9

Power Window Master SW

90980–11469

P10

Power Window Motor Front LH

90980–11011

P11

Power Window Motor Front RH

P12

Power Window Motor Rear LH

P13

Power Window Motor Rear RH

P14

Pretensioner LH

90980–11884

P15

Pretensioner RH

90980–11862

R1

Radiator Fan Motor

90980–11237

R2

Radio and Player

90980–10996

R3

Radio and Player

90980–10997

R4

Radio and Player

90980–10803

R5

Remote Control Mirror SW

90980–11657

R6

Rear Combination Light LH

R7

Rear Combination Light RH

R8

Rear Speaker LH

R9

Rear Speaker RH

R10

Remote Control Mirror LH

R11

Remote Control Mirror RH

S1

Steering Shaft Torque Sensor

90980–10942

S2

Shift Lock ECU

90980–11488

S3

Stop Light SW

90980–11118

90980–10797

90980–10860

90980–11011

90980–10935

90980–11587

Note: Not all of the above part numbers of the connector are established for the supply.

220 2003 PRIUS (EWD493U)

90980–11857

90980–11864 90980–11529 82675–36050

– 90980–10619

L Code

Part Name

Part Number

Code

Part Name

Part Number

221 2003 PRIUS (EWD493U)

M OVERALL ELECTRICAL WIRING DIAGRAM

222 2003 PRIUS (EWD493U)

[A] : System Title [B] : Indicates the wiring color. Wire colors are indicated by an alphabetical code. B

= Black

W = White

BR = Brown

L

= Blue

V

SB = Sky Blue

= Violet

R = Red

O = Orange LG = Light Green

P

Y

= Pink

= Yellow

[F] : Junction Block (The number in the circle is the J/B No. and the connector code is shown beside it). Junction Blocks are shaded to clearly separate them from other parts. Example:

GR = Gray

G = Green The first letter indicates the basic wire color and the second letter indicates the color of the stripe. Example:

,,,, ,,,, 3C indicates ,,,, that it is inside ,,,, Junction Block ,,,, No.3 ,,,, ,,,,

L–Y

[G] : Indicates related system.

2003 PRIUS (EWD493U)

L (Blue)

[H] : Indicates the wiring harness and wiring harness connector. The wiring harness with male terminal is shown with arrows ( ). Outside numerals are pin numbers.

Y (Yellow)

[C] : The position of the parts is the same as shown in the wiring diagram and wire routing. [D] : Indicates the pin number of the connector. The numbering system is different for female and male connectors. Example : Numbered in order from upper left to lower right

Numbered in order from upper right to lower left

Female

[I]

Male (

)

: ( ) is used to indicate different wiring and connector, etc. when the vehicle model, engine type, or specification is different.

[J] : Indicates a shielded cable. Female

Male

The numbering system for the overall wiring diagram is the same as above [E] : Indicates a Relay Block. No shading is used and only the Relay Block No. is shown to distinguish it from the J/B. Example :

[K] : Indicates and located on ground point. [L] : The same code occuring on the next page indicates that the wire harness is continuous.

Indicates Relay Block No.1

M

223

SYSTEMS

LOCATION

SYSTEMS

LOCATION

2003 PRIUS (EWD493U)

ABS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19–3

Navigation System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14–5

Air Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24–2

Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1~24–1

Back–Up Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2

Power Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18–2

Cigarette Lighter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11–4

Radiator Fan and Condenser Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22–3

Combination Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23–2

Radio and Player . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14–2

Door Lock Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15–2

Rear Window Defogger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22–2

Electric Tension Reducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13–4

Remote Control Mirror . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11–2

EMPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20–3

Seat Belt Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9–4

Engine Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3

Shift Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13–3

Gateway System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14–8

SRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21–2

Headlight (w/ Daytime Running Light) . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2

Stop Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–4

Headlight (w/o Daytime Running Light) . . . . . . . . . . . . . . . . . . . . . . . . . 3–2

Taillight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–2

Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12–2

Theft Deterrent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17–2

Hybrid Vehicle Immobiliser System . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–16

TOYOTA Hybrid System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2

Illumination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–2

∗ Charging ∗ Cruise Control ∗ Regenerative Brake

Interior Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10–3 Turn Signal and Hazard Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . 5–2 Key Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9–2 Wiper and Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12–3 Light Auto Turn Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9–3 Wireless Door Lock Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16–2 Light Reminder Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9–2

M OVERALL ELECTRICAL WIRING DIAGRAM

224

SYSTEM INDEX

M

2003 PRIUS (EWD493U)

(Cont. next page)

1 PRIUS ELECTRICAL WIRING DIAGRAM

P ow e r S ou rc e

T O Y O T A H y brid S y s te m

1

4

3

2

B–R

B–R

G–Y

G–Y

L–R

L–R

W–G

W

A B C D

L–Y W–G

ACC 2 AM1

IG1 4

B–Y

ST1

B–W

W–B

E

W–B 7 AM2

W–R

IG2 6

B–W

ST2 8

R–W

B–W R–W

2 2C I15 IGNITION SW

GR

CRUISE

OUTPUT CONTROL

CHARGE

10A GAUGE

14 GR–L

2

MPD1

3

GR–B

14 A 8 2D

C10 A , C11 B

3 B

4

COMBINATION METER

MP2+ GR

8 2K

L

B–W

1 2H

G1 GATEWAY ECU

4

5 2B

MPX+

7 2A

A7 A/C AMPLIFIER

11 GR 6 2B

W F17 A , F18 B

MPX1

E10 ENGINE CONTROL MODULE

11

W–B

1 A

MPX2

5

W–B

1 B

13

MPD2

11 2G

B8 BODY ECU

16

2 B

IG1 RELAY

W

120A MAIN

1

B–W

5A DC/DC–S

W–B

1 B

F10 A , F11 B , F12 C , F13 D

100A DC/DC

B–G

B–R 2 A

FUSIBLE LINK BLOCK NO. 1

1 D

W–B

B 1 C

1

21 A

W

3 1J

W–B

3 1K

W–B

1 1A

B

5A AM1

2

2

B–W W3 WATER PUMP MOTOR (Inverter) B–W

2 1B

IG2 RELAY

15A DOME

15A AM2

10A BATT FAN

20A HV 1 1B

3

GR–B

22 A

1

MPX–

L

5 2A

14 IK1 5

MPX+

4 2A

3 2B

6 2D

2 1A

15

W–G

7 1J

B–Y

9 1J

8 1J

L B–W

L–Y

W–R

L–R

G–Y

2003 PRIUS (EWD493U)

11 1F

H

GR–B

2 2G 1 2G

F G

W BR

FUSIBLE LINK BLOCK NO. 2

A BATTERY

W–B

J11 JUNCTION CONNECTOR

W–B ID

Cowl side panel LH

IH

Right kick panel

I J

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 PRIUS (EWD493U)

1 PRIUS (Cont’ d)

(Cont. next page)

T O Y O T A H y b rid S y s tem A B C D

B–R

5

* 1 : Shielded

8

7

6

G–Y

G–Y

L–R

L–R

A B

W

H10 C , H11 A , H12 B , H13 E , H14 D HYBRID VEHICLE CONTROL ECU IGSW 7 E

GND1 31 D

GND2 24 D

STP

VCP1 VPA1

1 D

EP1

VCP2 VPA2

13 D 14 D 12 D 23 D 15 D

EP2

P

22 D

N

D

B

R

15 E 13 E

23 E

22 E

14 E

VSFT

SFT

12 E 11 E

GSFT

EOM

21 E

5 E

R

W–B

SET/COAST

5

4

2

1

EP1 VCP2

3

VPA2

EP2

2

5 P

6 N

7 D

4 B

R

9

8

3

VSFT

SFT

GSFT

CANCEL ECC P1 PARK/NEUTRAL POSITION SW

1

J24 A , J25 B JUNCTION CONNECTOR A A

A A

A A

B A W–B

W–B

W–B

W–B

W–B B–R W W–B

W–B

I J

W–B W–B

J17 JUNCTION CONNECTOR

C D E F

G

A

A

A

IG

E A

W–B

J18 A , J19 B JUNCTION CONNECTOR

E A

W–B

C B

D B

A B W–B

C B

W–B

W–B

W–B A B

A13 ACCEL POSITION SENSOR

W–B

E

4

J22 A , J23 B

B–W

JUNCTION CONNECTOR

B–W

6

VCP1 VPA1

A A

E

(*1)

B

W

R–B

LG–R

L–B

L–W

L–R

R

(*1)

W

B

L

G

6 ID1

RES/ACC

E

W–B

B B

CCS

Y

3

CRUISE

J21 JUNCTION CONNECTOR

C A

5

C14 CRUISE CONTROL SW [COMB. SW]

J24 A , J25 B

2003 PRIUS (EWD493U)

JUNCTION CONNECTOR

C A

From Stop Light SW

4

W–B

W–B

W–B

L

R–W

R–W S3 STOP LIGHT SW B–W

H

W–B B–W

B–Y

G

CCS 16 D

W–B B–W

F

ST2 6 E

G–W

E

ST1– 2 D

Cowl side panel RH

W–B

W–B

H

M

2003 PRIUS (EWD493U)

1 PRIUS (Cont’ d)

(Cont. next page)

T O Y O T A H y b rid S y s tem 9 A B

* 1 : Shielded

12

11

10

G–Y

G–Y

L–R

L–R

A B

H10 C , H11 A , H12 B , H13 E , H14 D HYBRID VEHICLE CONTROL ECU ETH+ ETH– 28 D 27 D

HTE+ HTE– 19 D 29 D

ESTP SPDO 8 D

GO

GSNG 11 C

6 D 10 B

GSN 4 C

GRF 10 C

GRFG 17 C

GCS 5 C

GCSG 12 C

GMT 1 C

MSNG 20 C

MSN 13 C

MCS 14 C

MCSG 21 C

MRF 19 C

MRFG 18 C

MMTG 9 C

MMT 2 C

(*1)

L

P

(*1)

(*1) G

O

R–Y

BR

(*1)

Y

(*1)

W–B

(*1)

(*1)

GR

R–W

W

B

L

(*1)

P

R

G

B–R

G–W

BR

Y

W

B

R

(*1)

G

(*1)

(*1) B

(*1) B

(*1)

GSNG

2 A GSN

1 A GRF

6 A GRFG

GCS

8 A

9 A

GCSG

GMTG

4 A GMT

5 B MSNG

2 B MSN

3 B

6 B

MCS

MCSG

1 B MRF

4 B

3 C

MRFG

MMTG

J7 JUNCTION CONNECTOR

W–B

A

A

A

A

A

(*1)

M3 B , M4 C MOTOR GENERATOR NO. 2

A

A W–B

W–B

W–B

H

F

MMT

W W–B

B–R W

G

E

1 C

(*1)

M2 A MOTOR GENERATOR NO. 1

3 A

(*1)

C B

7 A

(*1)

C B

W–B

B A

W–B

B A

W–B

B–R

W–B

B A

W–B

W–B J8 A , J9 B

W–B

F

W–B

(*1)

(*1)

JUNCTION CONNECTOR

D E

D

(*1)

(*1) W–B

J18 JUNCTION CONNECTOR

C

C

(*1)

2003 PRIUS (EWD493U)

To Engine Control Module

B

GMTG 8 C

G H

W–B W–B W–B

J1 JUNCTION CONNECTOR Cowl side panel LH

A

IE

I

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 PRIUS (EWD493U)

1 PRIUS (Cont’ d)

(Cont. next page)

T O Y O T A H y b rid S y s tem 13 A B

* 1 : Shielded * 2 : High Voltage(273. 6V)

16

15

14

G–Y

G–Y

L–R

L–R

A B

H10 C , H11 A , H12 B , H13 E , H14 D HYBRID VEHICLE CONTROL ECU +B1

+B2

4 D

5 D

MWU 6 A

MUU 4 A

MVU 5 A

MIVG

MIVA

26 A

16 A

MIVB 7 A

MIWB 17 A

VB 20 A

MIWA 25 A

GIVA 19 A

GIVB 8 A

GIWB GIWA 18 A

28 A

GSDN 12 A

GIT 23 A

GWU 3 A

GVU 2 A

GUU

GIVG

1 A

27 A

MFIV

GSIV

14 A

15 A

GFIV 24 A

ILK 4 E O W–G

C

10 IF1

(*1)

O

W–G

W–G

1 G

B

B

R

W

G

L

Y

R

G

W

B

R

Y

G

W

B

B

(*1)

W

R

G

L

Y

G

I17 INTERLOCK SW

B

(*1) W–G

2

(*1)

O(* 2) V–R

(*1)

(*1)

O(* 2)

D E

4 IH1

(*1)

W–G

L–O

W–G

W–G

F

MIT 11 A

13 IA1

W–G

E

MSDN 13 A

(*1) W–G

V–R

2003 PRIUS (EWD493U)

D

MSIV 21 A

L–O

W–G

W–G 12 IA1 C

NODD 4 B

1 A IGCT

4 A

7 C

5 B

NODD

4 D

5 D

3 D

1 D

2 D

6 D

1 C

IGCT M–SINV M–SDOWN M–INVT M–WU M–UU M–VU M–GINV

3 C

4 C

M–IVA M–IVB M–IWB

5 C VB

2 C

1 B

3 B

M–IWA G–IVA G–IVB

4 B

2 B

4 A

5 A

G–IWB G–IWA G–SDOWN G–INVT

3 A

2 A

1 A

6 A

G–WU G–VU G–UU G–GINV

8 C

7 B

8 B

6 C

M–FINV

G–SINV

G–FINV

CVRSW CBI

1 E

1 F CEI

C4 A , C5 B CONVERTER S 3 A

AMD

IDH

GND 6 B

2 A

1 B

I 9 D , I10 C , I11 A , I12 B , I13 E , I14 F INVERTER

I

W–B

H

Y

G

W

B–R 2 IH1

14 IE1

B–R W W–B

Y

To A/C Amplifier

W–G

1 IH1

W–R

F

M

2003 PRIUS (EWD493U)

1 PRIUS (Cont’ d)

(Cont. next page)

T O Y O T A H y b rid S y s tem 17 A B

* 1 : Shielded * 2 : High Voltage(273. 6V)

20

19

18

G–Y

G–Y

L–R

L–R

A B

H10 C , H11 A , H12 B , H13 E , H14 D HYBRID VEHICLE CONTROL ECU WFSE 9 D

TC

21 D

HAI 10 E

CON1 13 B

CON2

CON3

2 B

1 E

HTD+ 2 E

HTD– 20 E

DTH+ 19 E

DTH– 18 E

GB 26 D

SPDI

IB 25 D

8 B

BTH+ 18 D

BTH– 17 D

ABFS 3 E

FCVC 7 D

L

B–W

From Airbag Sensor Assembly

From Transponder Key Computer

R

G

V

LG

3 IF2

From Brake ECU

6 IB1

To Combination Meter

10 IB1

B–L

R–W

G

5 A

(*1)

R

4 A

B

W

3 A

W–G

C

V–W

P

1 B

HTB– 30 D

V–W

4 IF2

B–L

2 IF2

R–W

G

1 IF2

(*1)

R

B

W

5 IF2 2

O(* 2) 1 C

HTB+ 20 D

19 IE1

1 C3 CIRCUIT BREAKER SENSOR

GR

V

2003 PRIUS (EWD493U)

O(* 2)

G–R

11 IF1

To Data Link Connector 3

E

AS1 15 B

BR–B

9 IH1

P

P

8 IH1

GR

V

10 ID1

D

AS1G 14 B

Y–R

Y

W–G

HAO 9 E

W–L

P–B

P

C

SIL

10 D

S 8 A , S 9 B , S10 C , S11 D , S12 E SYSTEM MAIN RELAY 1 A

7 A

2 A

6 A

1 D

L

1 E O(*2)

O(* 2)

O(*2)

O(* 2)

W–B

W–B

W–B

2

W–B

W–B

F

To Data Link Connector 3

B22 BATTERY INPUT RELAY

W–R W–B

W–B

4

1

3

5

6 W

C A

C A

C A

3 IF1

J32 A , J33 B

W

GR

Y–B

V–W

Y

B–L

R–W

G

R

B

W

W–R

Y–R

Y

B B

Y–B

JUNCTION CONNECTOR B B W–B

W–B

W–B

BJ

22 A GND

Right side of rear pillar

4 B

10 B

3 B

IB

V–

V+

2 A IGCT

6 A HTB+

7 A HTB–

18 A BTH+

19 A BTH–

17 A GB

16 A IB01

B17 A , B18 B BATTERY ECU

5 A CCTL

10 A EQCO

9 A EQTR

3 A SW1

8 A SIL

D E F G

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 PRIUS (EWD493U)

1 PRIUS (Cont’ d)

T O Y O T A H yb rid S y s tem 21 A B

24

23

22

* 2 : High Voltage(273. 6V)

G–Y L–R

L–R

H10 C , H11 A , H12 B , H13 E , H14 D HYBRID VEHICLE CONTROL ECU BATT

7 B

G–Y

C

7 IH1

MREL

3 D

W–G

L–R

LG–R 4 IA1

2

B19 BATTERY FAN RELAY

2

5

2

G–Y

G–Y

2

1 B15 BATTERY BLOWER MOTOR

M

L

B A

5

L

W–B

B A

2

1 IGCT RELAY

J2 A , J3 B

JUNCTION CONNECTOR

2

2 G–Y

W–B

O(*2)

O (*2)

F G

O(*2)

W–B

1 A

1 B L

O (*2)

HYBRID VEHICLE BATTERY

HYBRID VEHICLE BATTERY

BUSBER MODULE

3

4 B16 BATTERY BLOWER MOTOR CONTROLLER

SENSOR 5 IH1

BUSBER MODULE

2

FCTL1

2 B VM

A

B A

9 B SI

B A

J32 A JUNCTION CONNECTOR A

W–B

B17 A , B18 B BATTERY ECU

Left side of rear pillar

BI

W–B

AM

8 B

J7 JUNCTION CONNECTOR

W–B

TB1 GB1 TB2 GB2 TB3 GB3 TB4 GB4 TB5 GB5

1 A

L–R

10

L–B

LG–R

9

A

1

G–Y

8

G

7

R

6

G

5

R

4

W

3

B

2

W

VBB1 VBB3 VBB5 VBB7 VBB9 VBB11 VBB13 VBB15 VBB17 VBB19 VBB2 VBB4 VBB6 VBB8 VBB10 VBB12 VBB14 VBB16 VBB18 GBB19

1

L

24

B

11

L

23

L–B

10

R

22

W

9

G–W

21

G

8

L–R

20

Y

7

P–L

6

L

18

LG–R

5

L–W

P

17

Y–B

4

LG

16

L–O

O 3

LG–B

15

GR

V–Y

GR–B 2

W–B

O (*2)

G–Y

H16 A , H17 B

HYBRID VEHICLE BATTERY

SERVICE PLUG

14

L–B

L

D E

L–B

2003 PRIUS (EWD493U)

L 3

B B

3

O

G–Y

W–G

1

W–B

EC

Engine compartment left

A

IE

J1 JUNCTION CONNECTOR Cowl side panel LH

MEMO

2003 PRIUS (EWD493U)

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 PRIUS (EWD493U)

(Cont. next page)

2 PRIUS

P ow er S ou rc e

E n gine C on tro l

1

4

3

2

D

W–L

R–G

D

W–L B

J26 JUNCTION CONNECTOR B–Y

ACC 2 AM1

IG1 4

GR

ST1

GR

IG2 6 ST2

I15 IGNITION SW

MPX–

2 1A

MPX+

2

2 1B

3 1K

12 1F

1 1F

10 1A

13 1F

3 1A

4 1A R–W

B

B

G–R

L

W–B

W–B

4 IA2

2

B–R

G–R

W–B

W 1 C

1 B

3

14 IA1

22 A

3 B GR

L

L

B–R

R–W G–R

1 D

W–B

A

M 7

MPX+

19 IA1

MP2+ 6 2B

4

Near the fuel tank

BL

J1 JUNCTION CONNECTOR Cowl side panel LH

A

IE

J17 JUNCTION CONNECTOR Cowl side panel RH

B

B

A

IG

GR–B B

A B

I J K

L M

BR

W–B

W–B

W–B

J11 JUNCTION CONNECTOR

W–B

ID

F16 FUEL PUMP

A

W–B

Cowl side panel LH

J7 JUNCTION CONNECTOR

7 2A

C A

8 BC1

W–B

BATTERY

A

3

A J18 JUNCTION CONNECTOR

J4 A , J5 B

A

JUNCTION CONNECTOR

120A MAIN

C A

F18 FUSIBLE LINK BLOCK NO. 2

A7 A/C AMPLIFIER

11

B B

B–G

1

G–R

W–B

F11 B , F12 C , F13 D FUSIBLE LINK BLOCK NO. 1

G–R

100A DC/DC

14 A

C10 A , C11 B

5 2A

1

2 B

4 B

COMBINATION METER

2

B

1

MALFUNCTION INDICATOR LAMP

8 2D

8 2K

5 EFI RELAY

3

3

CIR OPN RELAY

IG2 RELAY

10A GAUGE

15A THRO

15A EFI

5 1 2H

H

GR–B

1

G–R

5

IG1 RELAY

5A AM1

7. 5A OBDII

7. 5A ECU–B

2003 PRIUS (EWD493U)

3

5

F G

B8 BODY ECU

3 1J

15

2

E

16 8 1A

15A AM2

D

B–W

9 1J

1

B C

GR

6 2D

11 2G

B–W

W–R

3 2B

9 2D

G–R 5 2B

B–W

GR

1 2G

B–Y

W–G

W–L

R–G 5 2C

2 2C

B–W

B–W

7 AM2

W–R

B–W

B–W

A

W–B

IH

Right kick panel

N O

M

2003 PRIUS (EWD493U)

2 PRIUS (Cont’ d)

(Cont. next page)

E n gine C on trol A B C D E F G

5

R–G

* 1 : Shielded

8

7

6

B–R

B

B B–W

B–W B–W

B–W

B–W

W–B

2 B–R

B–R

1

4

3

2

I4 IGNITER COIL AND IGNITER NO. 4

3

I3 IGNITER COIL AND IGNITER NO. 3

4

B–W

W–B

B–W

B–R

11 A

12 A

25 A IGF

IGT1

MREL 25 C

MPX1 14 D

+B 4 B

13 A

IGT2

EVP1

VG 10 B

THW

MOPS

14 B

12 B

M1 MASS AIR FLOW METER

5

2

MPD1 B

B

B

BR

BR

4

1

1

O1 OIL PRESSURE SW

1

2

Y–B

2

E1 ENGINE COOLANT TEMP. SENSOR

3

W

4

(*1)

R

G

R–B

MPD2

B

B

B

EVG 19 B

V2 VSV(EVAP)

GR–B

IGT4

ENGINE CONTROL MODULE

R–L

B

GR–L

G–R 11 G1 GATEWAY ECU

14 A

IGT3

THA 22 B

29 A

Y

MPX2

G

FC 9 B

14 ID2 From Brake ECU From EMPS ECU

B–R

BATT 3 B

BR

GR–G

GR–B

1

W

+BM

B–R

13 D

6 A

Y–G

W

GR

6 D

TC

GR

G–R

6 C

G–R

B

GR–G

2

B–R

1

B

3

E 7 A , E 8 B , E 9 C , E10 D

R–W

From EMPS ECU

From Airbag Sensor Assembly

P–B

W–L

P–B

C

G–R B

4

I2 IGNITER COIL AND IGNITER NO. 2

C

B–R

E

1

BR B

B

14 IO1 N

B

B A

A

J24 JUNCTION CONNECTOR

W–B

EB

(*1)

W–B

W–B

BR

O

D E

W–B

W–B

2

B–W

P–B C

SIL

W

W

BR

GR–G

M

3

G–R

J16 JUNCTION CONNECTOR L

From Battery ECU

From Hybrid Vehicle Control ECU

E

W–L

C B

P–B

C B

C

From Brake ECU

5

E

W–L

4 W–B

Y

P

Y–R

GR–G R–W

4

2 ID1

E

8 C

From Hybrid Vehicle Control ECU

12

SG

C

P–B

15

CG

W–L

8

OP2

J22 A , J23 B

WFSE

A A

E JUNCTION CONNECTOR

OP3

A A

W

SIL

3 ID1

K

B–W

7

TC

W

AB D2 DATA LINK CONNECTOR 3

14

J16 JUNCTION CONNECTOR

P–B 13

6

OP1

TS

1 ID1

W–L

E B–Y

11

BAT

J26 JUNCTION CONNECTOR

From Multi Display

From Airbag Sensor Assembly

2003 PRIUS (EWD493U)

16

E P–B

E

P–B

1

I1 IGNITER COIL AND IGNITER NO. 1

B–R

W–L

W

W–B

W–B

B–W

G–R

E

I

B–W

B C

GR

P–B

J

B–W

A

GR W–B

H

R–G

W–L

Engine block

EA

Engine block

F G H I

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 PRIUS (EWD493U)

2 PRIUS (Cont’ d)

(Cont. next page)

E n gine C on trol A B C D E

9

R–G

* 1 : Shielded

12

11

10

R–G

B–R

B–R

A B

B B–W

B–W B–W

B–W

B–W

B–W

C

B–W B A B

C2 CAMSHAFT TIMING OIL CONTROL VALVE

2

1

2

1

L L

(*1) W–G

Y–R

OX1B 11 D

HT1B 7 D

BR

22 IE1

E B

2

E1

J22 A , J23 B JUNCTION CONNECTOR

+B B

E B

4 D A

H3 HEATED OXYGEN SENSOR (Bank 1 Sensor 1)

12 IE1

3

1

OX1B

HT1B

+B 2

B

G–Y

Y

E B

(*1)

BR

3

BR

OX1A

1

1 IK1

BR

(*1)

E1

(*1)

W

4

W

P–L

BR

T3 THROTTLE POSITION SENSOR

6 IK1

HT1A

BR

BR

2 IE1

P–L 7 IK1

4

OCV–

BR 1 IE1

E2

V4 VAPOR PRESSURE SENSOR

24 A

OCV+

16 D (*1)

VTA2

23 A

GE01

E11

OX1A

(*1)

VTA1

BR

JUNCTION CONNECTOR

P

VC

30 A

M+

12 D

W

3

8 A

M–

P–L

2

HT1A 1 D

BR

J8 A , J9 B

E2 18 B

BR

1

E2 B B

L

VTA2 21 B

(*1)

7 IO1

7 A

CCV

P

1

13 C

BR

2

PTNK

4 BC1

BR

VC

L–R

3

7 BC1

E 7 A , E 8 B , E 9 C , E10 D ENGINE CONTROL MODULE

L

BR

L–R

C A

Y–R

C A

3 BC1

Y–R

Y–R

Y–R

B (*1)

Y–R

BR B

V1 VACUUM SENSOR (HC Adsorber and Catalyst System)

I

B

VC 3

BR

H

BR

V–W

G

V3 VSV(HC Adsorber and Catalyst System) B–W B

F

E2 1

VTA 23 B

Y–R

V–W

B–W 1

1

6 BC1

TBP

PTNK

Y–R

C A

#40

22 C

9 IO1

2

V5 VSV(Canister Closed Valve)

B

VC

11 C

2 A

#30

2 B

HCLS

2 V6 VSV(Parge Flow Switching Valve)

2 BC1 B–R

HCLS

1 A

# 20

15 IO1

2

B 2

B–W 6 B

#10

14 C

6 IO1

B

B

R–W

L–W

B–R

Y

2003 PRIUS (EWD493U)

5 B

IGSW

HCC

T2 THROTTLE CONTROL MOTOR

1 BC1 C A

5 BC1

B–R 1

9 D

20 C

J12 A , J13 B

2

N1 NOISE FILTER (Ignition)

1

I8 INJECTOR NO. 4

2

JUNCTION CONNECTOR

B–W

2

1

I7 INJECTOR NO. 3

1

I6 INJECTOR NO. 2

2

B–W

B–W 1

I5 INJECTOR NO. 1

1

J24 A , J25 B

B B

JUNCTION CONNECTOR

C A

B–W

B–W

B–W C A

A B

B

H9 HEATED OXYGEN SENSOR (Bank 1 Sensor 2) (*1) (*1)

D E

M

2003 PRIUS (EWD493U)

2 PRIUS (Cont’ d)

E n gin e C o ntro l

16

R–G F A

B–W

H B

B–R

B–W 11 ID2

10 ID2

8 ID1

IG

1

D

IND

L

P

Y

BR

O

9 IA2

R–Y

V–W

LG

GND

21 C

ESTP

10 C SPHV

GO

18 C

19 C

HTE–

28 C

HTE+

27 C

ETH+

ENGINE CONTROL MODULE

G2

28 A

10 A

NE–

NE+

24 B

7

A

ETH– 8 ID2

KNK1

KSW

6

L–B

16 C

TAM

CTY

R–W

23 C

J10 JUNCTION CONNECTOR

ACT

E 7 A , E 8 B , E 9 C , E10 D

W–B

22 D

NEO

12 LG–B

G

3 D

SPD

HEVC

T4 TRANSPONDER KEY COMPUTER

G

2003 PRIUS (EWD493U)

5 D

FAN

8

+B

5

4 A

B–W

3

J20 JUNCTION CONNECTOR R–G R–G

B–R

B–W

From Hybrid Vehicle Control ECU

See Air Conditioning System

To Combination Meter

From FAN NO. 1 and FAN NO. 2 Relay

A

A 2

* 1 : Shielded

To Hybrid Vehicle Control ECU

C

15

14

B–R

J27 A , J28 B

B

13

R–G

JUNCTION CONNECTOR R–G

A

H y b rid V eh ic le Im m ob ilis er S y s te m

E1

16 B

17 B

E01 21 A

E02 31 A

E03 3 A

ME01 9 A

9 ID1 A

(*1) L–B

W–B

LG–B

R

W–B

W–B

W–B

BR

W–B

(*1)

G

(*1)

B

(*1)

1 EA1

(*1) E B

A A

A A A A

A B

A

W–B

7 B

R3 B , R4 C

8 C BR

4

C7 CENTER CLUSTER SW

W–B

W–B

W–B

W–B

BR

From Body ECU

(*1)

6

RADIO AND PLAYER

A B

LG–B

J8 A , J9 B JUNCTION CONNECTOR

LG–B

2

A A

BR

(*1) Engine block

EB

EA

Engine block

Left kick panel

IF

ID

J11 JUNCTION CONNECTOR Cowl side panel LH

To Unlock Warning SW

A A

J27 A , J28 B JUNCTION CONNECTOR

To Door Courtesy SW Front LH

A A

BR

A A

BR

1

BR

G

C6 CRANKSHAFT POSITION SENSOR

2

G

E

(*1)

C1 CAMSHAFT POSITION SENSOR

K1 KNOCK SENSOR

D

1

(*1)

R

B 1

(*1)

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 PRIUS (EWD493U)

3 PRIUS

H ea dligh t (w /o D a y tim e R u nn in g L ig ht)

P o w er S o u rce 1

S top L ig h t 3

2

4

R–B 2

2

4

1 HEAD RELAY

L–Y

R–B

1

3

1 1B

8 1F

SHORT PIN

2

10A HEAD (LH)

6 1F

3

4 2A

C A

J30 A , J31 B

2 5

C B

FLASH

JUNCTION CONNECTOR B A

R–G BR

16

W–B

W–B

A J17 JUNCTION CONNECTOR Cowl side panel RH

W–B

J32 A , J33 B

HIGH

R7 STOP LIGHT RH [REAR COMB. LIGHT RH]

C B

LOW

G–W

6 2B

5

2 1

W–B

7 2I

G–W

7 2A

H15 HIGH MOUNTED STOP LIGHT

DIMMER SW

10 2A

2

W–B

R6 STOP LIGHT LH [REAR COMB. LIGHT LH]

L

D B

A B

G–W

HEAD

L

R–G F A

A B C10 COMBINATION METER

HIGH BEAM

R–G 14 F A

JUNCTION CONNECTOR

21

17

17 J12 A , J13 B

HEAD

7

HF HU HL

JUNCTION CONNECTOR

LIGHT CONTROL SW

120A MAIN

F18 FUSIBLE LINK BLOCK NO. 2

OFF TAIL

C13 COMBINATION SW BATTERY

EL

To Hybrid Vehicle Control ECU

C A

E A

3 IA1

R–G

R–W

1

8 T

G–W

L

E A

R–Y

R

H

To Shift Lock ECU

G–W

E B R–G

D B

8 IA1

R

B–G

13

G–W

1

17 5 ID2

D B

9 IB1

2 2G

J4 A , J5 B

H

F A

JUNCTION CONNECTOR

B9 BODY ECU

J14 A , J15 B

R–G

R–Y

HRLY

F A

2

R–Y

R–Y

2

R–W

100A DC/DC 1 D

F11 B , F12 C , F13 D

FUSIBLE LINK BLOCK NO. 1

1 C

J4 A , J5 B

R–W

JUNCTION CONNECTOR

E

B

W

2003 PRIUS (EWD493U)

J20 JUNCTION CONNECTOR

R–W

3 ID2 1 B

1

E A

D B

H2 HEADLIGHT RH

L–Y

R–W

B

E

To Brake ECU

JUNCTION CONNECTOR

3 H1 HEADLIGHT LH

2

E A

G–W

R–L

R–G

R–W

15A DOME

15A STOP

E

E A

7 1F

6 IA2

2 1B

G–W

4

7 1J

1 2H

1

10A HEAD (RH)

G–W

SHORT PIN

9 2K

S3 STOP LIGHT SW

1

W–B

IG

Right kick panel

IH

Left side of rear pillar

BI

Back panel center

BK

M

2003 PRIUS (EWD493U)

4 PRIUS

H e ad lig h t (w / D a ytim e R u nn in g L ig ht)

P o w e r S o urc e 1

4

3

2

R–G

ACC

4 2A W–G

2 AM1

IG1 4

H B

B–Y

R–G

R–L

L

To Parking Brake SW

12

3

E

7 2A

+B

6 2B

PKB

HI

2

8

7 T

L–O

W–B

R–B

R–G

LIGHT CONTROL SW DIMMER SW

R–W

HF HU HL

EL

OFF TAIL HEAD LO HIGH FLASH 13

8

16 BR

A

W–B

R–G

C13 COMBINATION SW

R–W

Cowl side panel LH

11

R–Y

R–G

R–L

7

R–G

L

DRL H

6

J11 JUNCTION CONNECTOR ID

J20 JUNCTION CONNECTOR

A

DIM H–LP IG D3 DAYTIME RUNNING LIGHT RELAY

R

A

R–G

W–B

W–B

IND

H

5 ID2

C R–G

L

R J20 JUNCTION CONNECTOR

W–B

R–B

R–G

R–G

R–B

A J1 JUNCTION CONNECTOR

IE

E

R–G

A

Cowl side panel LH

E R–G

2

D5 DIODE(Daytime Running Light)

3

E

A

6 IA2

4

R–G

R–W

1

BATTERY

CHG–

1

R–G E

R–B

2

5

17 B

3 ID2

16 IA2

R–G

H

Y–B

HRLY 2 B R–W

R–W

9 IA1 R–G

1 H2 HEADLIGHT RH

H1 HEADLIGHT LH

120A MAIN

3

B8 A , B9 B

G–R

2

9

R–B

R–W

R–Y

1

W–B

5 1E

RDY

C

7 2I

9 A

3 W–B

2 1E

DRL RELAY

10A HEAD HI (RH)

10A HEAD HI (LH)

7 1F

R

1 F18 FUSIBLE LINK BLOCK NO. 2

10A HEAD LO (RH)

10A HEAD LO (LH)

B–G

F11 B , F12 C , F13 D

FUSIBLE LINK BLOCK NO. 1

100A DC/DC 1 D

6 1F

2 3

17 IA2 7 ID2

3

5

10 2A

8 2K

1

L

Y–B

3

BODY ECU

B 1 C

C10 COMBINATION METER

R–L

3 3

8 ID1

21 L

2

2

17

HEAD

5 IG1 RELAY

R–G

3

HIGH BEAM

1 2

DIM RELAY

1 1B

10A GAUGE

1

3

3

B

1 B

7. 5A DRL

4

1 W

2003 PRIUS (EWD493U)

15A DOME

2

1 2 1B

SHORT PIN

7. 5A ECU–B

3

5

4

HEAD RELAY

30A HEAD

14

10 2K

11 1J

1 2

5 2C

5A AM1

1

3 1E

1 2H

R–G

L

8 1F

7 1J

6 2D 3 2B

L

R–L

R

R–G

L–Y

I15 IGNITION SW

R–G

2 2G

W

W–G

B–Y

ST1

J27 A , J28 B

L

JUNCTION CONNECTOR

F A

J17 JUNCTION CONNECTOR Cowl side panel RH

IG

Right kick panel

IH

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 PRIUS (EWD493U)

5 PRIUS

P o w er S o u rce

T u rn S ig na l a nd H a za rd W arn in g L ig ht

1

4

3

2

C10 TURN SIGNAL INDICATOR LIGHT [COMB. METER]

W–B

C 1 2H

10 2K

6 IA1

3 2F

4 2K

3 2M

6 2B

5

R7 REAR TURN SIGNAL LIGHT RH [REAR COMB. LIGHT RH]

J12 A , J13 B

5

3

W–B

W–B

B B

2

W–B

100A DC/DC

RH

2

G–Y

B A

3

R6 REAR TURN SIGNAL LIGHT LH [REAR COMB. LIGHT LH]

W–B

B A

TURN

G–Y

W–B

1 D

5 2M

G–B

W

B

3

1

F7 FRONT TURN SIGNAL LIGHT LH G–B

F8 FRONT TURN SIGNAL LIGHT RH

G–Y

G–Y

W–B

G–Y

2

C13 TURN SIGNAL SW [COMB. SW]

L

LR

LH F11 B , F12 C , F13 D

7 2A

2

W–B

FUSIBLE LINK BLOCK NO. 1

1 2A

LL

1

1

2 2A

3

8 2K 8 2D

1 B

14

L

12 2J

2 1B

1 C

L

7

6

G–B

EL 5

3

8

IG HAZ T5 TURN SIGNAL FLASHER RELAY E ER

L–B

2

G–R

IG1 RELAY

1 B

G

10A TURN–HAZ

W–B

5

4

18

4 ID1

R–L

J24 JUNCTION CONNECTOR

A 1

W

W–B

10A GAUGE

5A AM1

W

2003 PRIUS (EWD493U)

6 1J

A

RH

G–B

C

LH

19

J20 JUNCTION CONNECTOR

3 2B

W

6 2D

W

R–L

W–G

B–Y

I15 IGNITION SW

4

H7 HAZARD SW [HAZARD WARNING SW] G–R

E A

IG1 4 ST1

3

J22 A , J23 B

W–G

ACC 2 AM1

JUNCTION CONNECTOR

D B

JUNCTION CONNECTOR

B–G

11 IA1

A

ID

G–Y A

J1 JUNCTION CONNECTOR

J17 JUNCTION CONNECTOR Cowl side panel RH

IG

B A

W–B

Cowl side panel LH

A

J4 JUNCTION CONNECTOR

A J11 JUNCTION CONNECTOR

BATTERY

J7 JUNCTION CONNECTOR

A A

W–B

W–B

W–B A

A

BR

120A MAIN

F18 FUSIBLE LINK BLOCK NO. 2

A

W–B

A

J32 A , J33 B

W–B

G–Y

J18 JUNCTION CONNECTOR

A

JUNCTION CONNECTOR

C B

1

Cowl side panel LH

IE

BI

Left side of rear pillar

BK

Back panel center

IH

Right kick panel

M

2003 PRIUS (EWD493U)

6 PRIUS

P ow e r S ou rc e

B a c k– U p L igh t

1

4

3

2

R–B

R–B

ACC D A

D A

B A

JUNCTION CONNECTOR

IG1 4 ST1 W

B B 3 2B

3 2C

1 2H

R–L

6 2D

3

1

To Navigation ECU

2 9 IF1

W–G

R–B

1

R–B

10A GAUGE

5A AM1

B5 BACK–UP LIGHT RELAY 5

R–B

R–L

W–G

B–Y

I15 IGNITION SW

5 IJ1

J27 A , J28 B

2 AM1

JUNCTION CONNECTOR

W–G

5

14 A

HTE+ 19 D

HTE– 29 D

2 B

3 B

W–B 14 D MPX1

IH E 9 C , E10 D ENGINE CONTROL MODULE

W–B

IG

R7 BACK–UP LIGHT RH [REAR COMB. LIGHT RH]

MPX2

J32 A , J33 B

13 D

HTE–

W–B

18 C

B A

JUNCTION CONNECTOR

HTE+

5

W–B

19 C

4

BR

Cowl side panel RH

C B

GR–L

Cowl side panel LH

J17 JUNCTION CONNECTOR

MPD2 11

W–B

ID

6 2B 5

G1 GATEWAY ECU

B

A J11 JUNCTION CONNECTOR

4

GR–B

B

W–B A BATTERY

GR

1

4 MPD1 J18 JUNCTION CONNECTOR

E

J22 JUNCTION CONNECTOR W–B

120A MAIN

F18 FUSIBLE LINK BLOCK NO. 2

P1 PARK/NEUTRAL POSITION SW W–B

4 E

R–B

4

7 2A

R6 BACK–UP LIGHT LH [REAR COMB. LIGHT LH]

MP2+

W–B

B–G 1

R–B

L

16

MPX+

A7 A/C AMPLIFIER

BR

(Shielded)

Y

A 1 D

MPX–

B8 BODY ECU

A

11

MPX+

J24 JUNCTION CONNECTOR

100A DC/DC

15

F11 B , F13 D FUSIBLE LINK BLOCK NO. 1

B B

GR

GR–B

R–B

W–B

1 B

B A

J30 A , J31 B

RL 14 E

R–B

8 2D

8 2K

1 B

HYBRID VEHICLE CONTROL ECU

C10 A , C11 B

3

COMBINATION METER

H13 E , H14 D 2

W

2003 PRIUS (EWD493U)

L

IG1 RELAY

Right kick panel

BI

Left side of rear pillar

BK

Back panel center

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 PRIUS (EWD493U)

7 PRIUS

T a illigh t

P o w er S o u rce 1

1

5 TAIL RELAY

2

1 2H

4

3

2

7. 5A TAIL

J32 A , J33 B

3

JUNCTION CONNECTOR

6 2K

7 2J

5 2F

5 2L

A B

A A

A A

A A

A A

A A

A A

LG

G G

G

2 ID2

F B

D A

F B

W

D A

LG

G

G

G

G

G

G

11 TRLY

B9 BODY ECU

T

J4 A , J5 B JUNCTION CONNECTOR G

G

LG–R

F11 B , F13 D

2

W–B

EL

2

HEAD 16

C B

6

5

C B J32 A , J33 B

J7 JUNCTION CONNECTOR

A

JUNCTION CONNECTOR

W–B

B A W–B

Cowl side panel RH

W–B

A J17 JUNCTION CONNECTOR

A J1 JUNCTION CONNECTOR

IG

Cowl side panel LH

W–B

IE

Left side of rear pillar

BI

Back panel center

BK

W–B

A

W–B

C13 COMBINATION SW

BATTERY

1

W–B

W–B

1

5

W–B

W–B

6

TAIL W–B

120A MAIN

LIGHT CONTROL SW

OFF

1

R7 TAILLIGHT RH [REAR COMB. LIGHT RH]

1

1

L3 LICENSE PLATE LIGHT RH

2

R6 TAILLIGHT LH [REAR COMB. LIGHT LH]

2 W–B

1

H

W–B

B–G

14 T

2

1

L2 LICENSE PLATE LIGHT LH

LG–R

1

1

F6 FRONT SIDE MARKER LIGHT RH

2

F3 FRONT PARKING LIGHT LH

1 D

F4 FRONT PARKING LIGHT RH

6 ID2

W–B

F5 FRONT SIDE MARKER LIGHT LH

FUSIBLE LINK BLOCK NO. 1

F18 FUSIBLE LINK BLOCK NO. 2

G

G

18

1 B 100A DC/DC

2003 PRIUS (EWD493U)

10 IA1

M

2003 PRIUS (EWD493U)

8 PRIUS

Illu m in ation

P o w er S o u rce 1

4

3

2

L 4 2A LG TAIL RELAY

5A PANEL

H A

LG

5

LG

1

H A

H A J27 A , J28 B

2

1 2H

2 2G

3

6 2K

JUNCTION CONNECTOR F B

1 2D

F B

F B

F B

L

L–Y

LG

C10 A , C11 B

7 1J

5 A

5

10

6 B

3

L

LG–R

A

W–B C

E J21 JUNCTION CONNECTOR

C C

C

E

A

A W–B

L

W–B

W–L

W–L

J24 JUNCTION CONNECTOR

J21 JUNCTION CONNECTOR

W–L

120A MAIN

B

J21 JUNCTION CONNECTOR

7 2A

8 2D

6 2B

8 2K

D B J22 A , J23 B JUNCTION CONNECTOR A BR

BR IF

W–B

Left kick panel

W–B

E A BATTERY

7 B

14 A

W–L

W–B

J21 JUNCTION CONNECTOR

B–G

B

5

A W–L

B W–L

6

A

1 F18 FUSIBLE LINK BLOCK NO. 2

4

W–L

W–B

W–L

W–L

BR

W–L

100A DC/DC 1 D

L1 LIGHT CONTROL RHEOSTAT

2

LG

LG

10 B

F11 B , F12 C , F13 D FUSIBLE LINK BLOCK NO. 1

C7 CENTER CLUSTER SW

5 R2 A , R3 B

6

LG

8

RADIO AND PLAYER

1

H7 HAZARD WARNING SW

M7 MULTI DISPLAY

2

LG

LG

LG

B 1 B

A22 ASHTRAY ILLUMINATION

See Taillight System

W

15A DOME

2003 PRIUS (EWD493U)

2 1B

1 C

21 A

COMBINATION METER

Right kick panel

IH

J11 JUNCTION CONNECTOR Cowl side panel LH

ID

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 PRIUS (EWD493U)

9 PRIUS

P o w er S o u rce

K e y R em in d er an d L igh t R em ind er B uz z er

1

2

L igh t A u to T u rn O ff

S ea t B e lt W arn ing 4

3 L

L

W–G

GR–L

R–G F

F

IG1 4

MPD1 4

4 MP2+ MPX+ 11

L

3 B

L

GR

21 A

22 A

A A

2

SEAT BELT (Driver’ s Seat)

SEAT BELT (Front Passenger’ s Seat)

B20 BUCKLE SW LH

3

P–L

BUZZER

1 W–B

14 A

C10 A , C11 B COMBINATION METER

L

1 W–B

120A MAIN

B A

2

G–O

L–B

L–B

B21 BUCKLE SW RH AND SEAT BELT WARNING OCCUPANT DETECTION SENSOR

W–B

W–B

W–B

J27 A , J28 B JUNCTION CONNECTOR B A

A

G–O

LG

LG

W–B

B–G

D B

MPD2

GR–B

To Airbag Sensor Assembly

GR–B

3 B

2 B

9 IJ1

From Transponder Key Computer

1

5 B

MPX+ DBKL PKBL

1 2K

11

G–O

BODY ECU

A7 A/C AMPLIFIER

15 A

MPX–

3

2 ID2

F18 FUSIBLE LINK BLOCK NO. 2

16 A

G–O

T

DCTY B8 A , B9 B

9 2C

18 B

H

P–L

6 2K

8 2D

KSW 12

From Airbag Sensor Assembly

1 B

17 B

HRLY

See Interior Light System

F11 B , F12 C , F13 D

100A DC/DC

FUSIBLE LINK BLOCK NO. 1

11 B

E

2 B

B

J29 JUNCTION CONNECTOR

TRLY

9 B

IG

G–O

3

8 2K

15

TAIL

GR–B

17

GR

R–G

IG1 RELAY

W

B 1 D

8 IJ1

5

2 1 B

G–O

15A DOME

2003 PRIUS (EWD493U)

1

2 1B

10A GAUGE

3

7. 5A TAIL

2

TAIL RELAY

5

5A AM1

1

See Taillight System

1 2H

MPX2 13

See Headlight System

3 2B

7 1J

1 C

7. 5A ECU–B

6 2D

W

W–G

L–Y

I15 IGNITION SW

B–Y

ST1

2 2G

MPX1

E10 ENGINE CONTROL MODULE

G1 GATEWAY ECU

2 AM1

J27 JUNCTION CONNECTOR

5 2A

5 2C

ACC

GR–L

4 2A

14

11 IJ1 10 IJ1

W–B

A B

A B

6 2B

D B J22 A , J23 B

A A

E A

A A W–B

JUNCTION CONNECTOR

BR

ID

W–B

W–B

Cowl side panel LH

U1 UNLOCK WARNING SW

J24 A , J25 B

J11 JUNCTION CONNECTOR

1

JUNCTION CONNECTOR

A

W–B

BATTERY

2

W–B

L–B

7 2A

Right kick panel

IH

M

2003 PRIUS (EWD493U)

10 PRIUS

P ow er S ou rc e

In ter io r L ig h t

1

3

2

4

B

B

L GR–B

2 1B

GR–B W–G

ACC 2 AM1

IG1 4

15A DOME

4

1 2H

G1 GATEWAY ECU

3 2B

L

6 2D

W

W–G

B–Y

ST1

R–G

5 2C

5 2A

7 1J

MPD2 11

3 2N 3 B

2 B

22 A

21 A

1 B

12 A

LCTY 14 A

6

1 2K

6 2L

3 2K

LP 14 A

7 1 2N

L–Y E A

D B

D B

L–Y 2

D A

D A W–B

R–W

1

B

L6 LUGGAGE COMPARTMENT LIGHT SW

J33 JUNCTION CONNECTOR

B W–B

IH

P5 PERSONAL LIGHT

E B

R–W

Right kick panel

L–Y

1 1

R–W

J30 A , J31 B

JUNCTION CONNECTOR

L5 LUGGAGE COMPARTMENT LIGHT

2

BR

From Power Window Master SW

I16 INTERIOR LIGHT ON OFF

1

7 IC1 R–Y

DOOR

BR

1

D9 DOOR COURTESY SW REAR RH

2

1

R

D4 DIODE (Door Courtesy)

1

D8 DOOR COURTESY SW REAR LH R–G

1

D6 DOOR COURTESY SW FRONT LH R–W

ID

3 IB1

R–Y

Cowl side panel LH

R–B

R–W

J11 JUNCTION CONNECTOR

BATTERY

3

1

R–B

A R–W

W–B A

D7 DOOR COURTESY SW FRONT RH

120A MAIN

F18 FUSIBLE LINK BLOCK NO. 2

6 2B

R–W

A

7 2A

4 IF1

R–W

J16 JUNCTION CONNECTOR

1

D A

R–W

B–G

A

D A

R–L

R–W

1 D

J12 A , J13 B

F11 B , F12 C , F13 D FUSIBLE LINK BLOCK NO. 1

F B

JUNCTION CONNECTOR

F B From Transponder Key Computer

100A DC/DC

13 ID2

R

R–W

R–G

R–W

1 B

J30 A , J31 B

E A 2

1 C

JUNCTION CONNECTOR

L

R–W

W

W–B

W–B

RCTY

3

L–Y

8 2D

8 2K

DCTY

C10 A , C11 B

COMBINATION METER

DOOR

MPX–

BODY ECU PCTY

2 2G

L

L

GR–B

MPX2

16 A

MPX+

4 2A GR

15 A

B B8 A , B9 B

MPX+ 11

13 GR

9 B

IG

MPX1

GR–B

R–G

15

3

E

B

2003 PRIUS (EWD493U)

IG1 RELAY

14

GR–L

E10 ENGINE CONTROL MODULE

F

5

2

J27 JUNCTION CONNECTOR

7. 5A ECU–B

10A GAUGE

5A AM1

1

F

4 MP2+

L–Y

A7 A/C AMPLIFIER

I15 IGNITION SW

MPD1

Left side of rear pillar

BI

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 PRIUS (EWD493U)

11 PRIUS

P o w er S o u rce

R em o te C o ntro l M irror

1

4

3

2

P–L C

W–G

2 AM1

GR–R

ACC 3

C ig ar ette L ig hte r

J27 JUNCTION CONNECTOR

IG1

1 2H

C GR–R

3 2B

GR–R

8 2C

GR

I15 IGNITION SW

W

W–G

ST1

2 2D

5 2D

R5 REMOTE CONTROL MIRROR SW

8

10A ACC

HR

5

M+

E

6

7

2

W–B

L

R–G

BR–R

3

1 B

BR–R

A

W–B

A

M

BR–R

R–G

A

M

1

10 IN1

5

3

M

W–B

BATTERY

3

8 IN1

W

M

5

9 IN1

BR–R

LG

1

10 IG1

J11 JUNCTION CONNECTOR ID

Cowl side panel LH

R10 REMOTE CONTROL MIRROR LH

R11 REMOTE CONTROL MIRROR RH

A A

W–B

8 IG1

L

120A MAIN

9 IG1

F18 FUSIBLE LINK BLOCK NO. 2

W–B

R–G

W

BR–R

LG

L

BR–R

W–B

B–G 1

A A

J24 A , J25 B

A

1 D

JUNCTION CONNECTOR

A B 8 2D

8 2K

J26 JUNCTION CONNECTOR

100A DC/DC

F11 B , F13 D FUSIBLE LINK BLOCK NO. 1

W–B

HL

3

1

SELECT SW

MH

VR

4

RIGHT/DOWN

VL

LEFT/UP

RIGHT

ACC RELAY 2

LEFT

DOWN

UP MV

5

W

2003 PRIUS (EWD493U)

1

2

C8 CIGARETTE LIGHTER

15A CIG

OPERATION SW

5A AM1

GR

B

M

2003 PRIUS (EWD493U)

12 PRIUS

P o w e r S o urc e

W ipe r a nd W a sh e r

H o rn

1

4

3

2 L

C12 FRONT WIPER AND WASHER SW[COMB. SW] 10 IH1

ACC W–G

2 AM1

IG1 4

+B

+2

+1

+S

INT1

INT2

B1

EW

WF

OFF

B–Y

INT

L

ST1

1 2H

L

3 2B

L

6 2D

W

W–G

B–Y

I15 IGNITION SW

L

2 2N

LOW 2

6 2I

3 2G

M

W1 WASHER MOTOR

HI WASHER

1 L–Y

8

L–W L–W

L–B

B–W

W–B

B–R

3

5

1

2

+2

+1

+S

+B

1 H4 HORN B–R

A J20 JUNCTION CONNECTOR

D D

M

J18 JUNCTION CONNECTOR

D A

B–R

B–G

F11 B , F12 C , F13 D

100A DC/DC

FUSIBLE LINK BLOCK NO. 1

W–B

8 IA2

1 D

15 IA1

L

B 1 C

17 IA1

L–R

9 1F

+S 16

L–B

16 IA1

8 2K

1 B

+1 7

L–R

W–B

3

WIPER RELAY +2

E 2

L

2

17 L–Y

5

3

2 1J

30A WIPER

1

+B

IG1 RELAY

2 1B

W

2003 PRIUS (EWD493U)

HORN RELAY 2

11

2 IA1

5

10A HORN

15A WASHER

5A AM1

1

WF

1

E F9 FRONT WIPER MOTOR

W–B

B–R

W–B

C14 HORN SW [COMB. SW]

J11 JUNCTION CONNECTOR Cowl side panel LH

ID

A

A

A BATTERY

J1 JUNCTION CONNECTOR

J17 JUNCTION CONNECTOR IG

Cowl side panel RH

IE

Cowl side panel LH

J7 JUNCTION CONNECTOR A A

4 W–B

6 W–B

To Body ECU

120A MAIN

F18 FUSIBLE LINK BLOCK NO. 2

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 PRIUS (EWD493U)

13 PRIUS

P o w er S o u rce

S h ift L o c k

1

12 IJ1

4 2C

2 2I

2 2D

8 2C

1

C B

3

B

B

1

STP

ACC

G

2

6

B–Y

IG1 RELAY

3 IG P1

3

P

1 B

P2

R

3

B

2

Y

1

SLS+

W–B

W–B

1 D

8 2D

E

4 L

W–B

B–G

A A

W–B

W–B

W–B

J21 JUNCTION CONNECTOR

E

D B

D B

W–B

J22 A , J23 B JUNCTION CONNECTOR

J11 JUNCTION CONNECTOR ID

W–B

Cowl side panel LH

E A W–B

W–B

3 E

W–B

120A MAIN

J24 A , J25 B JUNCTION CONNECTOR

A

2

11 IJ1 U1 KEY INTERLOCK SOLENOID [UNLOCK WARNING SW]

A B

A A

1

4

1 F18 FUSIBLE LINK BLOCK NO. 2

B

1

SHIFT LOCK SOLENOID

KLS+ S2 SHIFT LOCK ECU

5

BATTERY

L–R

SLS–

B20 TENSION REDUCER LH[BUCKLE SW LH]

FREE

W–B

100A DC/DC

8 2K

3 LOCK

SHIFT LOCK CONTROL SW

F11 B , F13 D FUSIBLE LINK BLOCK NO. 1

2

J21 JUNCTION CONNECTOR

D

GR–R

G–W

W

2003 PRIUS (EWD493U)

5

T6 TENSION REDUCER SOLENOID

D J26 JUNCTION CONNECTOR

1 ID2

1

1

5 ID1 B–Y

2

10A ACC

JUNCTION CONNECTOR

GR–R

ACC RELAY

5A ECU–IG

J27 A , J28 B

G–W

5A AM1

5

D C A B–Y

I15 IGNITION SW

J14 JUNCTION CONNECTOR B–Y

1 2H

D

GR–R

3 2B

From Stop Light SW

6 2D

W

ST1

GR–R

B–Y

P–L

P–L

IG1 4

B–Y

ACC 3

B–Y

2 AM1

4

3

2

W–G

W–G

E lec tric T e ns io n R ed uc e r

MEMO

2003 PRIUS (EWD493U)

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 PRIUS (EWD493U)

(Cont. next page)

14 PRIUS

P ow e r S ou rc e

R ad io a n d P la y er

1

* 1 : w/o Navigation System * 2 : w/ Navigation System

4

3

2

R–G B–Y

L–Y

L–Y L–Y ACC 3

4 2D W–G 2 AM1

GR–R

P–L

GR–R

1 2H

2 2I

P–L

6 2D 3 2B

B–Y

5 2C

C B

GR–R

V(*2) GR–R

4 IJ1

P(*2)

B 9 IJ2

E F G

W–B

3 B

BU+B

6 B

ACC+B

FL–

H I

8 IJ2

P (*2)

GR–R

V (*2)

W

B

4 B

J26 JUNCTION CONNECTOR

GR–R

B

GR–R

L–Y

8 2K

1 B

C B

L–Y

2 1B

1 C

D

GR–R

5

C B

J27 A , J28 B

2

C A

GR–R

3

C A

JUNCTION CONNECTOR

3

IG1 RELAY 2

C

GR–R

GR–R

1

ACC RELAY

15A DOME

2003 PRIUS (EWD493U)

C B 5

J24 A , J25 B

B A

JUNCTION CONNECTOR

B A

L–Y

L–Y

10A ACC

7. 5A ECU–B

5A AM1

5A ECU–IG

L–Y

B A

7 1J 1

B

8 2C 2 2D L–Y

I15 IGNITION SW

W

B–Y

2 2G

GR–R

ST1

R–G

GR–R W–G

IG1 4

A

2 B FL+

R2 A , R3 B , R4 C 100A DC/DC

RADIO AND PLAYER

F11 B , F12 C , F13 D GND

FUSIBLE LINK BLOCK NO. 1

7 B

FL–

2 B

6 B

FR+

FR–

1 B

5 B

RL+

RL–

2 A

6 A

RR+

RR–

1 A

3 A

ACC+B 12 C

EJECT 11 C

BU+B 5 C

GND 8 C

2 9 EJCT

2 +B

ID

IF

Left kick panel

F

C R

1 ACC

C

G

R9 REAR SPEAKER RH

F

R

BR

L–R

1

P–B

R8 REAR SPEAKER LH

GR

2

6 IF1

W

1

5 IF1

R

F15 FRONT DOOR SPEAKER RH

Y

2

8 IF1

4

8

7

GND

TX–

TX+

BR

J11 JUNCTION CONNECTOR Cowl side panel LH

1

7 IF1

B

W–B

F14 FRONT DOOR SPEAKER LH

A BATTERY

2

4 IN1

L

1

3 IN1

LG

V (*1)

P (*1)

120A MAIN

F18 FUSIBLE LINK BLOCK NO. 2

4 IG1

TX+ 10 C

G

3 IG1

J26 JUNCTION CONNECTOR

B–G 1

TX– 9 C

W

R

Y

B

L

LG

V (*1)

P (*1)

BR

1 D

FL+

C7 CENTER CLUSTER SW

C

R

F

G

J K

M

2003 PRIUS (EWD493U)

14 PRIUS (Cont’ d)

N av iga tio n S y s te m A B

D

D

GR–R GR–R +B1 GR–R

1 C

ACC

TX+

4 C

TX–

3 A 10 A

TX1–

VG 6 B

10 B

R

G

2 B

7 B

SYNC 8 B

B

VR

TC

3 B

1 B

14 A

PKB

GND1 6 C

13 A

B–Y

R

G

G

8 B SYNC

3 B

1 B

B

VR

6 B VG

17 A GND

8 2D

A

From Back–Up Light Relay Left kick panel

IF

J11 JUNCTION CONNECTOR ID

Cowl side panel LH

3 MPX–

MPX2 13

MPX+

16 B8 BODY ECU

R–B

BR

To Combination Meter

W–B

V–W

V–W

C11 COMBINATION METER

21 IJ1

NAVIGATION ECU 3 IJ1

MPX1

W–B 8 2K

14 A

MPX+ 11

14

GR

REV N2 A , N3 B

BR

BR

SPD

4 MP2+

GR

D B

5 A

E

GR–L

7 B

R

E

E10 ENGINE CONTROL MODULE

2 B

11

GR–B

TX1–

MPD2

4

W–B

10 B

BATT

MPD1

A7 A/C AMPLIFIER

TX1+

J22 A , J23 B

5 B

E A

8

IG

W–B

A JUNCTION CONNECTOR

AUO+

J21 JUNCTION CONNECTOR

A W–B

W–B

2 A

CG

W–B J24 JUNCTION CONNECTOR

(SHIELDED)

Y

G

AUO–

B

11 A

R

ACC

W

18 A

(SHIELDED)

AUI–

G

10 A

R

AUI+

2

7

A

G (*2)

1 A

+B

R (*2)

9 A

GR–R

K

R G

V(*2)

P(*2)

L–Y

J

6 IJ2

R–G

9 ACC G1 GATEWAY ECU

14

G (*2)

R (*2) 7 IJ2

3 IG1

H B

B–Y

5

GTX– GTX+

F A

J21 JUNCTION CONNECTOR

GR–R

R

12

GND 4 IG1

D D

G

20 IJ1

5 ID1

To Combination Meter

19 IJ1

IG 2 C

B–Y

To Parking Brake SW

(SHIELDED)

18 IJ1

Y

15 IJ1

G

17 IJ1

B

16 IJ1

R

22 IJ1

W

(SHIELDED)

G

R

7 IJ1

TX3+ 4 A

D

7 ID1

R–Y

To Data Link Connector 3

(SHIELDED)

P (*2)

V (*2)

6 IJ1

TX3– 11 A

V–W

BR

R–Y

P–B

Y

G

B

R

W

BR

G

R

F14 FRONT DOOR SPEAKER LH 2 1

P(*2)

SPD 5 A

L–Y

2003 PRIUS (EWD493U)

I

V(*2)

TX1+ 5 B

G

R

GR–R

L–Y

L–Y 1 IJ1

H

D

M5 A , M6 B , M7 C MULTI DISPLAY

L–Y

J27 A , J28 B

F G

L–Y

R–G

E

8

7

6

B–Y JUNCTION J14 CONNECTOR JUNCTION CONNECTOR B–Y B–Y B–Y

C

5

R–G

G ate w a y S y ste m

* 2 : w/ Navigation System

2

MPX– MPX+ 15

GR–B

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 PRIUS (EWD493U)

(Cont. next page)

15 PRIUS

D oo r L o ck C o ntro l

P ow e r S o urc e 1

F

W–G

J27 JUNCTION CONNECTOR

F

ACC

R–G

R–G

B–Y

W

IG1 4

W–G

2 AM1

4

3

2

ST1

9 B 6 2D

1 2H

3 2B

B

5 2C

B8 A , B9 B

I15 IGNITION SW

BODY ECU B

IG

E

KSW

1 B

15

W–B

3 2K

Y

8 2D

B A

D B

L–B

L–B

W–B

CPUB DCTY 5

16

KUL

W–B

W–B A A W–B Cowl side panel LH

A A W–B

5 IC1 G

W–B

W–B

120A MAIN

F18 FUSIBLE LINK BLOCK NO. 2 A J11 JUNCTION CONNECTOR ID

J24 A , J25 B

7 IG1

R

LOCK

L–Y

, F13 D

B–G

2 IG1

JUNCTION CONNECTOR

W

5

3

A B

10

G–Y

6

UNLOCK

1

LSWD

6

L–B

U1 UNLOCK WARNING SW

See Power Window System

From Transponder Key Computer

2

KL

15

L–Y

W–B

W–B

1 IG1

1

BATTERY

MPX1

C B

L–Y

F11 B , F12 C

FUSIBLE LINK BLOCK NO. 1

100A DC/DC 1 D

J24 A , J25 B

JUNCTION CONNECTOR

B 1 C

B A

P9 POWER WINDOW MASTER SW

18

B A

2 1B

1 B

A

1 2K

See Interior Light System

L–Y 8 2K

J27 A , J28 B

4 2D

ACTD 10 B

G

3

RX 6 A

3

R

2

6 2L

DCTY

5 IG1

JUNCTION CONNECTOR

15A DOME

9 2C

PCTY 12 A

L–B

5

IG1 RELAY

W

2003 PRIUS (EWD493U)

1

6

10A GAUGE

2 2G

30A DOOR

7 1J

7. 5A ECU–B

L–Y

RCTY

12

Y

5A AM1

8

4

1

2

M

D13 DOOR LOCK MOTOR, DOOR KEY LOCK AND UNLOCK SW AND DOOR DETECTION SW FRONT LH

M

2003 PRIUS (EWD493U)

15 PRIUS (Cont’ d)

D o or L oc k C on tro l 5

8

7

6

B8 A , B9 B BODY ECU

UL2

L2

16 B

LSWP

7 B

17 A

A

16

4 2I

1 2J

9 2L

A B

B B W–L

R

G

W–L

1 IF1

W–L

W–L

1 BA1

W–B

3 W–B

1 BB1

3 W–B

D11 DOOR LOCK MOTOR AND DOOR UNLOCK DETECTION SW REAR LH

2

UNLOCK

LOCK

M

D12 DOOR LOCK MOTOR AND DOOR UNLOCK DETECTION SW REAR RH

5

D10 DOOR LOCK CONTROL SW FRONT RH

6

R–B

4

6 IN1

G–B

M

1

W–L

2

1 IN1

7 BA1

R

1

6 BA1

G

3

4

2 BA1

W–B

W–B 7 IQ1

7 BB1 W–L

LOCK

UNLOCK

D14 DOOR LOCK MOTOR, DOOR KEY LOCK AND UNLOCK SW AND DOOR UNLOCK DETECTION SW FRONT RH

2

1

R

5

6 BB1

G

6

M

4

2 BB1

R

G

3

6 IQ1

2 IF1

R

G

R

G

2

J33 JUNCTION CONNECTOR

B

W–B

A A

A W–B

A

IG

W–B

W–B

J18 A , J19 B JUNCTION CONNECTOR

W–B

A B

W–B

B

2 IQ1

W–B

W–B A B

5 IQ1

B A

L4 LUGGAGE COMPARTMENT DOOR UNLOCK SW

B B

B A

L–B

A B

W

G

L–B

1

2 IN1

5 A

J22 A , J23 B

JUNCTION CONNECTOR

JUNCTION CONNECTOR

B A

W

G

L–B

2003 PRIUS (EWD493U)

C A

12 ID2

12 IN1

G–B

8 2L

LUG

UL1 15 B

J14 A , J15 B

B B

11 IN1

L1 14 B

W–L

R

G

G C A

LSR 18 A

L–B

ACT–

9

R–B

ACT+

J17 JUNCTION CONNECTOR Cowl side panel RH

BI

Left side of rear pillar

Right side of rear pillar

BJ

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 PRIUS (EWD493U)

(Cont. next page)

16 PRIUS

W ireles s D oo r L o c k C o ntro l

P o w e r S o urc e 1

4

3

2

W–G

ACC IG1 4

B–Y

ST1 6 2D

B8 A , B9 B

W

W–G

2 AM1

15

3 2B

8

IG

1 2H

BODY ECU B

I15 IGNITION SW

5 2C 2

U1 UNLOCK WARNING SW

R–G

C B

1

F R–G

F

PRG

2

B–G

A A

A A

B J33 JUNCTION CONNECTOR

A A B

1 W–B

W–B

W–B

W–B

1

J24 A , J25 B JUNCTION CONNECTOR

RDA E

W5 WIRELESS DOOR CONTROL RECEIVER

A B

L

L–Y

+B

3

B–R

R–G

5

W–B

F

1 IG1

1

W–B

J27 JUNCTION CONNECTOR

L–Y

F11 B , F12 C , F13 D

100A DC/DC

FUSIBLE LINK BLOCK NO. 1

W–B

JUNCTION CONNECTOR

1 D

W–B

1 2K

See Interior Light System

L–B

8 2D

W–B

B 1 C

1 B

L4 LUGGAGE COMPARTMENT DOOR UNLOCK SW

2

8 2K

3 2K

3

L–B

B

J24 A , J25 B

6 2L

DCTY

2 IF1

J27 JUNCTION CONNECTOR

3

PCTY 12 A

6

L–B

L–B B

B A

RCTY

5 A

9 2C

L

2

4 2D

LUG

KSW 12

L–Y

2 1B

W

2003 PRIUS (EWD493U)

IG1 RELAY 15A DOME

RDA 8 A

B–R

5

R–G

1

2 2G

PRG 7 A

7. 5A ECU–B

7 1J

S 9 B

W–B

10A GAUGE

30A DOOR

5A AM1

L–Y

E 1 B

J23 JUNCTION CONNECTOR

E W–B

120A MAIN

E F18 FUSIBLE LINK BLOCK NO. 2

W–B

W–B L–Y

A J11 JUNCTION CONNECTOR

BATTERY

ID

Cowl side panel LH

BJ

Right side of rear pillar

A B

M

2003 PRIUS (EWD493U)

16 PRIUS (Cont’ d)

W ire le ss D o or L oc k C on trol 5

8

7

6

B8 A , B9 B BODY ECU

RX

ACTD

6 A

UL2

10 B

L2

16 B

LSWP

7 B

17 A

ACT+

ACT–

9

16

4 2I

1 2J

LSR

L1

18 A

UL1

14 B

15 B

Y B B

A B

B B

LSWD

12 ID2

10

W–L

KL 6

R

KUL 15

5

B B G

CPUB

1 IF1

R

G

R

G

W–L

W–L

7 IG1

5 IC1

6 IQ1

6 BB1

7 BB1

W–B

1 BA1

2 IQ1

A B

A W–B

W–B

A

IG

W–B

W–B

A A

J17 JUNCTION CONNECTOR Cowl side panel RH

BI

Left side of rear pillar

D10 DOOR LOCK CONTROL SW FRONT RH

3

W–B

JUNCTION CONNECTOR

UNLOCK

1 BB1

3

R–B

D11 DOOR LOCK MOTOR AND DOOR UNLOCK DETECTION SW REAR LH

5

LOCK

2

W–B

D12 DOOR LOCK MOTOR AND DOOR UNLOCK DETECTION SW REAR RH

6 IN1

G–B

6

M

W–B

L–Y

4

W–B

W–B

B

W–B

1

W–L

M

J18 A , J19 B A

2

1 IN1

7 BA1

R

1

6 BA1

G

3

4

2 BA1

W–L

R

G

5

D14 DOOR LOCK MOTOR, DOOR KEY LOCK AND UNLOCK SW AND DOOR UNLOCK DETECTION SW FRONT RH

7 IQ1

2 BB1

R

G 6

M

4

A B

5 IQ1

W 3

W–B

D13 DOOR LOCK MOTOR, DOOR KEY LOCK AND UNLOCK SW AND DOOR UNLOCK DETECTION SW FRONT LH

2

LOCK

M

1

2 IN1

G

2

UNLOCK

W–B 2 IG1

1

12 IN1

L–B

LOCK

UNLOCK 3

4

11 IN1

G

R

5

B A

W

G–Y

L–B

L–Y

See Power Window System

6

R–B

A B

B A

W–L

DCTY

G–B

JUNCTION CONNECTOR

J22 A , J23 B

B A

JUNCTION CONNECTOR

C A

MPX1

16

W–L

9 2L

W

G

L–B

18

G

R

Y

2003 PRIUS (EWD493U)

P9 POWER WINDOW MASTER SW

R

C A

G

G

5 IG1

8 2L J14 A , J15 B

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 PRIUS (EWD493U)

17 PRIUS

T h eft D e ter ren t

P ow e r S o urc e 1

4

3

2

From HORN Relay

D

IG1 4 B–Y

J26 JUNCTION CONNECTOR

ST1 D

4 ID2 4 2I

B–R

W–L

I15 IGNITION SW

See Door Lock Control System

B–R

W–L

W

W–G

ACC 2 AM1

10 A

11 A BDR

18 A

HR

14 B

LSR

15 B

L1

6 A

UL1

RX

10 B ACTD

16 B UL2

7 B L2

17 A

5 A

LSWP

LUG

8 2L

1 2J

9

16

ACT+

ACT–

B8 A , B9 B W–L

W

W–G 3 2B

1 2H

9 2D

IG

8

15

B

E

9 B

1 B

KSW

1

1

W–B

W–B

120A MAIN

F18 FUSIBLE LINK BLOCK NO. 2

R–G A B W–B

E2 ENGINE HOOD COURTESY SW

2

W–B

W–B

B–G 1

To Center Cluster SW

R–W

1

T1 THEFT DETERRENT HORN

IND 13 B

10 IE1

B–W

5 2C

8 2D

See Interior Light System

R–G

8 2K

2 U1 UNLOCK WARNING SW

F

1 D

L–B

3

HCTY 13 A

9 IE1 J27 JUNCTION CONNECTOR

F

J27 JUNCTION CONNECTOR

7. 5A ECU–B

2

SH 20 A

1 2K

L–B

10A GAUGE

30A DOOR

7. 5A OBDII

5A AM1 IG1 RELAY 100A DC/DC

F11 B , F13 D

1 B

3 2K

3

LG–B

6 2L

DCTY

R–W

9 2C

PCTY 12 A

B–W

W–B

R–G

6

B

W 5

RCTY

12

B 1

FUSIBLE LINK BLOCK NO. 1

2003 PRIUS (EWD493U)

6 2D

BODY ECU B

J24 A , J25 B A

JUNCTION CONNECTOR

J7 JUNCTION CONNECTOR

A A A W–B

W–B

W–B

A

A J11 JUNCTION CONNECTOR

BATTERY

ID

Cowl side panel LH

Cowl side panel LH

IE

J1 JUNCTION CONNECTOR

9 2L

M

2003 PRIUS (EWD493U)

18 PRIUS

P ow e r S o urc e

P ow e r W in do w

1

4

3

2 B8 A , B9 B BODY ECU

ACC E W–G

2 AM1

IG1 4

IG

1 B

B

RX

9 B

15

ST1

1 2L G–R

L–O

B–W

W

L–W G–R

L–O

L–W

B–W 4 BB1

5 BA1

3 BA1

4 BA1

U 5

6

1

SU

SD

U 5

1 BA1

1 2 M P12 POWER WINDOW MOTOR REAR LH

W–B BI

D

2 Y

2 1 M P13 POWER WINDOW MOTOR REAR RH

E 3 W–B

Y

1 BB1

4 PCT

D

2

P7 POWER WINDOW CONTROL SW REAR LH G G–R

E 3

L–O

SD

W–B

Cowl side panel RH

1

SU

W–B

W–B

IG

2 1 M P11 POWER WINDOW MOTOR FRONT RH J17 JUNCTION CONNECTOR A W–B

6

D

2 Y

W–B 1 IQ1

A

U 5

4 PCT

L–W

E 3

P8 POWER WINDOW CONTROL SW REAR RH G B–W

E

W

SD

W–B

W–B

P10 POWER WINDOW MOTOR FRONT LH

W

1

SU

1

To Diode (Door Courtesy)

3 BB1

L–W

6

W–B

2

4 PCT

MPX1

9 R–Y

Y

5

DCTY 16

G

O

P–L

GR 4

DU 8

DON 20

M

Cowl side panel LH

2 2L

L–W

SGND 11

P6 POWER WINDOW CONTROL SW FRONT RH G G–B

LMT 13

18

IG

G–B

PLS 12

B

5 BB1

5 IN1

R–W

WLSW

4

7 IN1

L–W

1

Y

P9 POWER WINDOW MASTER SW

120A MAIN

ID

5 2K

5 IG1

R–L

2

CPUB

8 IC1

W–R

B–L

5

W–B

10 2J

Y

R–L

W–R 3 IC1

R–W

C

B–L

L–Y

3

RLD

7 IB1

L–W

11 2J

2 IC1

A

G–B

A A

3 IQ1 1 IG1

J11 JUNCTION CONNECTOR

10

J14 A , J15 B

A A

JUNCTION CONNECTOR

C B

L–W

7 2K

1 IC1

BATTERY

C B

3

L–W

A

R–W

L–W

2

3 2I

F18 FUSIBLE LINK BLOCK NO. 2

5

10 2K

J20 JUNCTION CONNECTOR

8 2K

1

RLU

1

L–W

R–L

3

5

C C B

RRU

See Interior Light System

7. 5A ECU–B

2

20A PWR1

B A

1

W–B

B–G

F11 B , F12 C , F13 D

FUSIBLE LINK BLOCK NO. 1

100A DC/DC 1 D

30A POWER

IG1 RELAY

L–Y

1 C

5

POWER RELAY

1

L–Y J24 A , J25 B

JUNCTION CONNECTOR

B

1 B

10A GAUGE

5A AM1

2

4 2D

2 1B

W

2003 PRIUS (EWD493U)

15A DOME

RRD

14

W–B

W

W–G

B–Y

2 2G

FLD 2 A

5 2C

1 7 1J

FLU 3 A

3 1 2K

R–G

1 2H 8 2D

6 2D 3 2B

L–Y

DCTY

6 A

Y

R–G I15 IGNITION SW

J27 JUNCTION CONNECTOR F F

Left side of rear pillar

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 PRIUS (EWD493U)

(Cont. next page)

19 PRIUS

P ow er S ou rc e

ABS

1

4

3

2

B–Y B–W

L B–W L

W

V–R 3

ACC

2 IP1

10 A

GR–B

L

22 A

F

9 A

G

2 B

3

4 2

2

4

3

14 IA2

6 3

Y–B

2

1

3

ABS SOL RELAY

2

3

HYDRO MTR NO. 2 RELAY

B

W

4 2

2

1

14 A

3 R

L

LG–R

G

Y–G

G–W

W–B

FUSIBLE LINK BLOCK NO. 1

ABS

3

2

Y–B

2

3

W–R

F10 A , F11 B , F12 C , F13 D

C10 A , C11 B COMBINATION METER

3 B GR

B–L

B–L

Y–B 1 D

LG–R

B–G

1

E

Y–B

1

BRAKE

2

HYDRO MTR NO. 1 RELAY

5A ECU–IG

IG1 RELAY

W–R

2

5

1 2G

L–O

B

1

Y–B W–L

15A AM2

2 2C

10A GAUGE

5A AM1

W–R

I15 IGNITION SW

1 C

100A DC/DC

D

1 IP1

L

L

1

3

8 2K 1 B

2

2 2I

C

ST2

2

1 A

5 2A

1 2H

B

2

B–Y

3 2B

L

6 2D

W

W–G

B–Y

20A ABS NO. 3

30A ABS NO. 2 9 1J

2 1B

W

2003 PRIUS (EWD493U)

1

IG2 6

B–W

ST1 2 7 AM2

1

IG1 4

10A ABS NO. 4

2 AM1

6 1K

40A ABS NO. 1

W–G

W–L

B 4 1K

R

3

A

L–O Y–G

120A MAIN

F18 FUSIBLE LINK BLOCK NO. 2

G G–W

W–B

6 2B

A BATTERY

ID

Cowl side panel LH

BR

J11 JUNCTION CONNECTOR

IH

Right kick panel

7 2A

L

H

I J K L M N O

M

2003 PRIUS (EWD493U)

19 PRIUS (Cont’ d)

(Cont. next page)

ABS A B

C D E

1 B

V–R R

9 C

5 C

10 C

2 B

12 C

3 B

4 C

11 C

3 C

6 C

2 C

WA

22 D +BS

B–W

18 B

L

B–W

V–R

19 A

R1+ 7 B

MR1 29 A

R2+ 3 D

1 C

1 A SFRH

IG2

MR2 2 D

GND1

2 A

21 A

SFRR

GND2

31 A

7 A

SFLH

8 A

9 A

4 A

3 A

SRRH

SRRR

SMC1

SMC2

SFLR

MTT

6 A

MT+

27 A

MT–

28 A

18 A

5 A SS

PH 11 A

6 D AST

1 D

SLA–

PL 9 D

7 D

SLR+

LBL

GND3

SLR–

GND4

8 B

7 C

PKB

17 B

13 C

R–Y

W–B

W–B

LG–R

18 IA2

3 B

3 A

6 A

1 A

R–Y

4

5 B

HYDRAULIC BOOSTER LG–R

1

W–B

W–B

G

2 B

5 A

1 B

4 A

W–B

W–B

Cowl side panel LH

A

A

A J7 JUNCTION CONNECTOR

W–B

J11 JUNCTION CONNECTOR

IE

W–B

W–B

A A

W–B

W–B

W–B

A

W–B

W–B

G–W

J1 JUNCTION CONNECTOR

1

4 B

G W–B

G–W

2 A

E B

E B

R–Y From Multi Display From Daytime R–Y Running Light Relay P2

PARKING BRAKE SW

L–O Y–G

E A

J12 A , J13 B

H5 A , H6 B

Y–B

E A

JUNCTION CONNECTOR

B–L

R–Y

B4 BRAKE FLUID LEVEL WARNING SW

2

O

16 D

8 D

SLA+

Y–R

GR

Y

Y–G

W–L

W–B

W–B

Y–G

L–O

LG–R

Y–B

MP2+

MPX+

11

SP1

GR–B

A7 A/C AMPLIFIER

2 B

B10 A , B11 B , B12 C , B13 D

B–L

4

BRL

SR G1 GATEWAY ECU

MPD1

5 B

BRAKE ECU

GR–L MPD2

R–Y

E10 ENGINE CONTROL MODULE

11

N

V

2 2K

GR

2003 PRIUS (EWD493U)

14

M

P

LG

L

B–O

G–O

G–B

G–W

R–L

R–Y

R–G

Y–B

12 2G

MPX1

GR

R–W

R–B

4

MPX2

L

B1 A , B2 B , B3 C

B–W

16 A

GR–B

13

K

7 C

BRAKE ACTUATOR

MPX–

15 A

I

8 C

1 C

5 2B MPX+

J

A

L

B8 A

H

B–Y

B–W

BODY ECU

G

8

7

6

R

F

5

B–Y B–W

A A

ID

Cowl side panel LH

W–B

B

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 PRIUS (EWD493U)

19 PRIUS (Cont’ d)

ABS A

9

B–Y

11

10

12

B–Y

D A

B1 A , B2 B , B3 C

J14 A , J15 B

BRAKE ACTUATOR

JUNCTION CONNECTOR 9 A

5 A

1 A

12 A

8 A

4 A

11 A

7 A

3 A

10 A

6 A

E B

2 A

B–Y

BUZZER 1 B–Y

G

B14 BRAKE WARNING BUZZER

To Data Link Connector 3

(Shielded)

R

W

B

(Shielded)

R

W

B

(Shielded)

R

W

B

(Shielded)

R

W

B

From Stop Light SW

2

E B

13 IA2

12 A

E2

16 C

SG1

VREG

25 C PREG

24 C EREG

15 C

9 C

SG2

VFR

28 C

27 C

PFR

EFR

18 C

5 D

SG3

13 D

VRR

20 D

PRR

ERR

19 D

3 B

SG4

10 B

TC

4 B

D/G

G

23 A

PMC

G–W

22 A

VCM

GR–G

W–L

P–B

2003 PRIUS (EWD493U)

10 A

20 C

1 B

TS

BZ

STP

6 B IG1

B10 A , B11 B , B12 C , B13 D BRAKE ECU HVI+ 24 B

14 B

FL+

22 B

FL–

16 A

15 A

FSS 24 A

FR+

FR–

14 A

21 B

RLO 15 B

W

B

BR

(Shielded)

2

To EMPS ECU

L

1

A23 ABS SPEED SENSOR REAR LH

(Shielded)

1

RRO 23 B

2 IB1

P

2

A5 ABS SPEED SENSOR FRONT RH

RR– 12 B

Y

1 IB1

RR+ 11 B

BR–B

L

P

(Shielded)

L

(Shielded)

To Hybrid Vehicle Control ECU

1

RSS

20 B

(Shielded)

P

G

R

(Shielded)

W–B

2

W–B

RL–

19 B

5 IB1

A4 ABS SPEED SENSOR FRONT LH

B

RL+

13 A

BR

R

G

W–B

A

HVO–

(Shielded)

V

(Shielded)

A

W–B

HVO+

16 B

LG

J10 JUNCTION CONNECTOR

A

HVI–

1

2

A24 ABS SPEED SENSOR REAR RH

M

2003 PRIUS (EWD493U)

20 PRIUS

P ow er S ou rc e

EMPS

1

2

4

3

W

3

ACC 1 W–G

2 AM1

IG1 4 L

50A EMPS

ST1

22

2

L

3

2 2I

5 2A

6 2G B–R

E B

3 L L

B–Y

Y

7 IA2

3 IP1

1 IM1

PIG

1 B

5 D

WL

IG

2 B

M1

1 D

M2

SIL

3 D

9 D

TC

TS

E3 A , E4 B , E5 C , E6 D 100A DC/DC

F10 A , F11 B , F13 D

EMPS ECU

FUSIBLE LINK BLOCK NO. 1

6 2B

PGND

TRQV

TRQ1

2 C

1 A

4 A

TRQ2 2 A

TRQG

WRR

WRL

4 D

3 A

10 D

GND

A B

A B

J11 JUNCTION CONNECTOR ID

Cowl side panel LH

IH

Right kick panel

A W–B

W–B

W–B A BATTERY

J17 JUNCTION CONNECTOR

A

IG

Cowl side panel RH

From Brake ECU

A A S1 STEERING SHAFT TORQUE SENSOR

W

4

VT2

B

3

VT1

J18 A , J19 B

1

W–B

JUNCTION CONNECTOR

BR

120A MAIN

2 VCC

5 IO1

(Shielded)

B

G

R

W

W–B

(Shielded)

B–G F18 FUSIBLE LINK BLOCK NO. 2

W–B

(Shielded)

1 D

1

GR–G

7 D

1 C

RLY

P–B

W–L

W–B

2 D 7 2A

Y

B

GR

8 2K

1 B

B–Y

3 L

W

1 A

M 2

B

GR

2

1

D1 DC MOTOR

11

5 3

D A

J14 A , J15 B

5 IG1 RELAY

W

2003 PRIUS (EWD493U)

2 1

14

EMPS RELAY

To Data Link Connector 3

3 3

JUNCTION CONNECTOR

7. 5A ECU–B

10A GAUGE

5A AM1

5A ECU–IG

3 1

B–Y

C10 COMBINATION METER

1 2H

3 2B

R–G

B–Y

6 2D

W

W–G

B–Y

I15 IGNITION SW

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 PRIUS (EWD493U)

21 PRIUS

P ow e r S o urc e

SR S

1

ACC 3 W–G 2 AM1

C A

C B

B

GR–R

GR–R

ST2

P–L

W

W–G

B–W

1 2H

3 2B

8 2C

B

5 B

GR–R

14 A

L

J26 JUNCTION CONNECTOR

J27 A , J28 B

IG2 6

4

P–L

IG1 ST1

W–R 7 AM2

* 1 : w/ Side Airbags

3

2

JUNCTION CONNECTOR

16 A

C10 A , C11 B SRS WARNING LIGHT [COMB. METER]

2 2D

2 2C

1 2G

2

3

To Data Link Connector 3

10A ACC

5 ACC RELAY

1 5A AM1

I15 IGNITION SW

W–R

S4 SIDE AIRBAG SENSOR LH

4 2B

9 2A 1

2 2E

S5 SIDE AIRBAG SENSOR RH

L

B–Y

P–B

W

To Hybrid Vehicle Control ECU

5 2B

4 2E

3 2E

From Buckle SW RH

8 2K

To Buckle SW LH

B–W

10A SRS ACC

15A AM2

2

3

4

1

2

3

4

1 2E

2 1B

SSL–

9 A ESL

12 C

9 C

VUPR

SSR+

7 C SSR–

GR (*1)

12 A

SSL+

LG (*1)

10 A

L–Y (*1)

VUPL

P (*1)

7 A

GR–L (*1)

LA

LG–B (*1)

3 B

TC

L–W (*1)

19 B

SIL

P–L (*1)

12 B

GSW2

B–Y

23 B

RBE+

P–B

LBE+

W

8 C

11 A

IG2

L

5 B

ACC

E2

G–O

1 C

G–O

6 B

28 B 1 B

B–O

GR

W–B

W–B

B

W

2003 PRIUS (EWD493U)

9 1J

10 C ESR

100A DC/DC

A17 A , A18 B , A19 C F11 B , F12 C , F13 D

AIRBAG SENSOR ASSEMBLY

FUSIBLE LINK BLOCK NO. 1

PL+ 2 A

PL– 1 A

PR+ 5 C

PR– 6 C

D+

D–

14 B

13 B

P+ 10 B

P– 11 B

SFL+ 6 A

SFL– 5 A

SFR– 2 C

SFR+ 1 C

+SR 9 B

L

W–B

2

1

2

2

1

2

BR

2 1

1

W–R

2

BR–W

1

2 IL1 7 2A

SPIRAL CABLE 2

1 IL1

2 B–W

120A MAIN

F18 FUSIBLE LINK BLOCK NO. 2

4 IL1

27 B

BR

1

E1

–SL 26 B

W–R

3 IL1

1

+SL 15 B

BR–W

Y–R (*1)

Y–G (*1)

Y–G (*1)

Y–R (*1)

Y–G

Y–R

Y

Y–B

Y

Y–B

Y

Y–B

B–G

B–W

1 D

–SR 20 B

1

1

6 2B

W–B Cowl side panel LH

ID

P14 PRETENSIONER LH

P15 PRETENSIONER RH

A21 AIRBAG SQUIB (Steering Wheel Pad)

A20 AIRBAG SQUIB (Front Passenger Airbag Assembly)

S6 SIDE AIRBAG SQUIB LH

S7 SIDE AIRBAG SQUIB RH F2 FRONT AIRBAG SENSOR RH

F1 FRONT AIRBAG SENSOR LH

Right kick panel

IH

BR

J11 JUNCTION CONNECTOR

W–B

A BATTERY

M

2003 PRIUS (EWD493U)

22 PRIUS

P o w er S o u rce

R a diato r F an a nd C on d en se r F an

R ea r W ind ow D efo gg e r

1

2

4

3

W

B–Y

4 1J

3 1B W–G

ACC 2 AM1

GR–B 1

IG1 4

3 2B

4 2M

1 2H

30A RDI

7 2G

13

2 5

3

2

1

40A DEF

5A AM1

DEF RELAY

1

5

4

3 5

3

FAN NO. 1 RELAY

1

30A CDS FAN

6 2D

B–Y

DFG

B8 A

B

W

W–G

B–Y

I15 IGNITION SW

MPX+

BODY ECU

15 A ST1

2

1

FAN NO. 2 RELAY 5

FAN NO. 3 RELAY

2

3

2

1

2

5 7 1K

3 1K

V–Y

A

MPX+

N4 NOISE FILTER (Rear Window Defogger) SW RDEF

A

11 IE1

V–Y

PSG

J7 JUNCTION CONNECTOR

2 A J1 JUNCTION CONNECTOR Cowl side panel LH

W4 WATER TEMP. SW IE

1 W–B

V–Y

V–Y A B

W–B

ID

11

A

W–B

Cowl side panel LH

E A

A W–B

A7 A/C AMPLIFIER

J11 JUNCTION CONNECTOR

3

3

REAR WINDOW DEFOGGER SW

A

W–B

BATTERY

7 IE1

To A/C Amplifier

F18 FUSIBLE LINK BLOCK NO. 2

To A/C Amplifier

C11 COMBINATION METER

GR

120A MAIN

REAR WINDOW DEFOGGER

1

M 2

2

W–B

MPX–

V–Y

MPX+

1

J27 A , J28 B

2

12 1J

JUNCTION CONNECTOR

B–G

1

W–B

5 1K

G–W

B

1 D

6 IE1

W–G

FUSIBLE LINK BLOCK NO. 1

A3 A/C SINGLE PRESSURE SW

GR–B

W–B

100A DC/DC

F11 B , F13 D

2 1K

A1 A/C CONDENSER FAN MOTOR

1 B

10 1J

R–W

8 2K

To Engine Control Module

1

L–W

M

5 1J

LG

2

R1 RADIATOR FAN MOTOR

5A ECU–IG

10A GAUGE

W–B

L–W

3

11 1A

R–W

IG1 RELAY

2

W

W

2003 PRIUS (EWD493U)

1

E A

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 PRIUS (EWD493U)

(Cont. next page)

23 PRIUS

P ow er S ou rc e

C o m bina tio n M ete r

1

3

2

R–G

4

R–G

GR

6 2J

8 2J

9 2J

MPD2 MPD1

E10 ENGINE CONTROL MODULE

4

SENSOR

FUEL SENDER

2 B

20 A 12 A

MP2+ MPX+

F16 FUEL SENDER

Y–B

Y

L–Y

L–R

L

L

L

L

21 A

11

MPX1

GR–B

6

BR–R BR–R

1

Y–B

5

Y

8

4 IP1

22 A

14

MPX2

MPX+ 15 A

19

13

4

4

L 13 A

FU–

11

L–W

5 IP1

10A GAUGE

L–Y

7. 5A ECU–B

6 2A

FU+

20

L–Y

JUNCTION CONNECTOR

5 2A

I15 IGNITION SW

5A AM1

From Navigation ECU

5 2C

7 2B

J27 A , J28 B

FUA

MPX–

11 GR

3 B

1

5

3

2 1B W

B

8 2K

1 B

W–B

1 C

100A DC/DC

F11 B , F12 C , F13 D FUSIBLE LINK BLOCK NO. 1

1 D

B–G

1

BUZZER

14 A

2 A

1 A

3

5

1

E

ODO

TC

11 A

H8 ODO/TRIP SW [HAZARD WARNING SW] Right kick panel

C10 A , C11 B COMBINATION METER

See EMPS System

IH

9 A

See ABS System

Cowl side panel LH

1 B

See Back–Up Light System

ID

BR

J11 JUNCTION CONNECTOR

6 B

See Illumination System

W–B

6 2B

A BATTERY

7 B

L

L

7 2A

3 A

L

L

120A MAIN

F18 FUSIBLE LINK BLOCK NO. 2

HEAD

2

DOOR

IG1 RELAY

15A DOME

2003 PRIUS (EWD493U)

VFD 7 1J

A7 A/C AMPLIFIER

G A

16 A

B

G1 GATEWAY ECU

G B

V–W

1 2H

V–W

L

3 2B

R–G

W

W–G

B–Y 6 2D

2 2G

G A

9 B

GR–B

IG1 4 ST1

G B

B8 A , B9 B

2 AM1

V–W

From Multi Display

V–W

W–G

L

ACC

From Hybrid Vehicle Control ECU From Engine Control Module

BODY ECU

F

4 2A

G V–W A

J27 JUNCTION CONNECTOR

F

GR–L

M

2003 PRIUS (EWD493U)

23 PRIUS (Cont’ d)

C o m bina tio n M ete r

See Headlight System

17 A 18 A 19 A 5 B

HIGH BEAM

TURN R

TURN L

SRS

COMBINATION METER

See Turn Signal Light System

See SRS System

ABS

MALFUNCTION INDICATOR LAMP

SEAT BELT (Front Passenger’ s Seat)

WATER TEMP. (High)

WATER TEMP. (Low)

CRUISE

OUTPUT CONTROL

CHARGE

OIL

SEAT BELT (Driver’ s Seat)

BRAKE

2003 PRIUS (EWD493U)

16 A 10 A 4 B C10 A , C11 B

8 7 6 5

See SRS System

See ABS System

See Engine Control System

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 PRIUS (EWD493U)

(Cont. next page)

24 PRIUS

P o w e r S o urc e

* 1 : w/ Daytime Running Light * 2 : w/o Daytime Running Light * 3 : Cold Area Spec.

A ir C on ditio ning

1

4

3

2

B–R(*3) G–W(*3) G

13 1J

1

5

5 1A

3 1F

4 1F

2

3 1K

10A HTR

8 A

3

W–B

R

B–L

8 2K

8 2D

3 2D

MGC 10 B

A A

WP 3 B

2

SI

2

5 3

M

3

R

B–L

J6 A (*1) JUNCTION B (*2) CONNECTOR

C A

R

W–B

4

A B

13 IE1 R

J1 JUNCTION CONNECTOR

A A

IE

Cowl side panel LH

W–B

W–B

W–B

W–B

L–R

A

C A

1 W–B

120A MAIN

1 L

GND B7 BLOWER MOTOR LINEAR CONTROLLER

A3 A/C DUAL PRESSURE SW

3

A (*1) B (*2)

A B

A

A J11 JUNCTION CONNECTOR

A J7 JUNCTION CONNECTOR

ID

Cowl side panel LH

A B

J22 A , J23 B JUNCTION CONNECTOR

J24 A , J25 B

4 W–B

L–R

3

L–Y

1

W2 WATER PUMP MOTOR (A/C)

+B

V

C (*1) A (*2)

JUNCTION CONNECTOR W–B

20 IE1

GND 7 A

W–B

L–R

R

15 IE1

IG 1 A

A A

L–Y

3

A/C W/P RELAY

2

VM

R

V

B–G

1

R

3

B–R

B–W

1 D

BATTERY

L–Y

R

2

C (*1) A (*2)

R

B6 BLOWER MOTOR

LG–R R

J6 JUNCTION CONNECTOR

100A DC/DC

1 M

F18 FUSIBLE LINK BLOCK NO. 2

21 IE1

PSW 11 B

V

F10 A , F11 B , F13 D FUSIBLE LINK BLOCK NO. 1

8 IE1

BLW 3 A

V

W

A B

W–B

JUNCTION CONNECTOR

LG–R

B–R

W 1 A

A7 A , A8 B , A9 C A/C AMPLIFIER

+B

J2 A , J3 B W

E

F IG1 RELAY

2

LG–R

B–R

1

3

1

3

L–O J27 JUNCTION CONNECTOR

R–G

8 1K

R–G

3

1 3 1B

A A

1 B

F CLR MG RELAY

L–O

50A HTR3

30A HTR2 1

1

1

HTR RELAY 2

7. 5A ECU–B

2

5

5 2C

10A GAUGE

2

30A HTR1

2003 PRIUS (EWD493U)

2

3

5

4

50A HTR

G–W (*3) 3

G

B–R (*3) 3

I15 IGNITION SW

8 2G

1 2H

5A AM1

1

2

6 2D 3 2B

B–Y

D

R–L

IG1 4 ST1

W

W–G

ACC 2 AM1

B C

R–L

W–G

A

F

M

2003 PRIUS (EWD493U)

24 PRIUS (Cont’ d)

(Cont. next page)

A ir C on ditio ning * 3 : Cold Area Spec.

5 A B C D

8

7

6

B–R(*3)

B–R(*3)

G–W(*3)

G–W(*3)

G

G

R–L

R–L

B8 A HRLY

MPX+

MPX– 16 A

5 IA2

W–G

MPX+ MPX–

MPD2

C11 COMBINATION METER

G1 GATEWAY ECU

MPD1

3

2

1 2 IK1

BR

BR–W

5 B ACT

TS

SGTPI

5 C

20 C

S5TPI 18 C

TPI 19 C

AIF 22 C

1 B

4 C

RF

TR

3 C

1 C

SGTR

AIR 21 C

1

S5TP 17 C

TE

SGTP 15 C

TP 16 C

W

S5TS 6 C

18 B

W

IDH 10 A

A6 AMBIENT TEMP. SENSOR

2

W

NE

22 D

E 8 B , E 9 C , E10 D ENGINE CONTROL MODULE

1

W

CF 2 B

E2

R–W

SGLOCK 18 B

TAM

ACT

P–G

LOCK 9 B

MPX2

4 B

MP2+

2

23 C

NEO

LG

GR–B

GR

2003 PRIUS (EWD493U)

4 A

MPX+

13 D

MPX1

3 D

4

11 A

A7 A , A8 B , A9 C

14 D

A12 A/C THERMISTOR

11

A10 A/C ROOM TEMP. SENSOR

2

L–O

W–G

GR

E

GR–L

GR–B

6 2F

From FAN NO. 1 and FAN NO. 2 Relay

15 A

18

BODY ECU

2 C SGTE

AMC 14 C

AMH 13 C

A/C AMPLIFIER W

W

W

W

W

W

W

II1

8 II1

9 II1

10 II1

BR–R

L

Y–R

1

7 II1

BR–Y

A11 A/C SOLAR SENSOR W–R

4

W

2

1 1

W

W

W

W

From Converter

6

BR–W

B–L

From FAN NO. 3 Relay

BR–W 5 IK1

W–L

F

Y

5 IE1

W–L 4 IK1

V–Y

BR–W

W–L 4 IE1

2

3

4

5

1

2

3

4

2

A2 A/C MAGNETIC CLUTCH AND LOCK SENSOR

M

A14 AIR INLET CONTROL SERVO MOTOR

M

A15 AIR MIX CONTROL SERVO MOTOR

5

A B C D

M OVERALL ELECTRICAL WIRING DIAGRAM

2003 PRIUS (EWD493U)

24 PRIUS (Cont’ d)

A ir C o nd ition in g * 3 : Cold Area Spec.

9 A B C D

12

11

10

B–R(*3) G–W(*3) G R–L

3

R–L (*3)

3

1

3

3

1

3 1

TPM 8 C

PSG

AOF 10 C

SW A/C

SW F/R

SW RDEF

SW FULL A/C

PIG

AOD 11 C

LED A/C

LED F/R

LED RDEF

HTRO A7 A , A8 B , A9 C

6 B

2

LED FULL A/C

5 3

2 3

HTR2 13 B

2

II1

1

II1

P–B (*3)

1 A

3 B

Y–B

R

GR–L

BR–W

W 2

3

1 B P3 A , P4 B PTC HEATER

2 A 1

G–R (*3)

P–B (*3)

II1

5 3

W

W

W

W 4

2 3

L–Y (*3)

16 IE1

P 3 II1

HTR1 RELAY

P–B (*3)

A/C AMPLIFIER

5 II1

5 3

18 IE1

3

P–B (*3)

9 C

PIG5

3

HTR2 RELAY

L–R

SGTPM

MSET

P

S5TPM 7 C

W

2003 PRIUS (EWD493U)

TSET

3

3

HTR3 RELAY

BSET

B–R (*3)

G–W (*3)

G

R–L

R–L (*3)

4

4 B

2 B

5

Cowl side panel LH

W–B (*3)

IE

J1 JUNCTION CONNECTOR

5 IA1

W–B (*3)

W–B A

A16 AIR VENT MODE CONTROL SERVO MOTOR

W–B (*3)

W–B (*3) 1 IA1 M

A

A

ID

Cowl side panel LH

J11 JUNCTION CONNECTOR

3