Toyota PRIUS 2006 ELECTRICAL WIRING DIAGRAM

FOREWORD

This wiring diagram manual has been prepared to provide information on the electrical system of the 2006 PRIUS.

Applicable models: NHW20 Series

Refer to the following manuals for additional service specifications and repair procedures for these models:

Manual Name	Pub. No.
D 2006 PRIUS Repair Manual	RM01R0U
D 2006 PRIUS New Car Features	NM01R0U

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

Always follow the directions given in the above repair manuals when handling supplemental restraint system components (such as removal, installation, inspection, etc.) in order to prevent accidents and supplemental restraint system malfunction.

E2005

All rights reserved. This book may not be reproduced or copied, in whole or in part, without the written permission of Toyota Motor Corporation.

First Printing : Nov. 07, 2005 01–051107–00

2006 PRIUS ELECTRICAL WIRING DIAGRAM

	Section Code	Page
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . .	. . . . . A . . . .	2
HOW TO USE THIS MANUAL . . . . . . . . . .	. . . . . B . . . .	3
TROUBLESHOOTING . . . . . . . . . . . . . . . . .	. . . . . C . . . .	12
ABBREVIATIONS . . . . . . . . . . . . . . . . . . . .	. . . . . D . . . .	17
GLOSSARY OF TERMS AND SYMBOLS .	. . . . E . . . .	18
RELAY LOCATIONS . . . . . . . . . . . . . . . . . . .	. . . . F . . . .	20
ELECTRICAL WIRING ROUTING . . . . . . .	. . . . G . . . .	46
SYSTEM CIRCUITS . . . . . . . . . . . . . . . . . . . .	. . . . H . . . .	62
GROUND POINT . . . . . . . . . . . . . . . . . . . . . .	. . . . . I . . . .	360
POWER SOURCE (Current Flow Chart)	. . . . . J . . . .	366
CONNECTOR LIST . . . . . . . . . . . . . . . . . . . .	. . . . K . . . .	374
PART NUMBER OF CONNECTORS . . . . .	. . . . L . . . .	392
OVERALL ELECTRICAL WIRING DIAGRAM . M . . . .		396

1

PRIUS (EM01R0U)

A INTRODUCTION

This manual consists of the following 13 sections:

	No.	Section	Description
		INDEX	Index of the contents of this manual.
	A
		INTRODUCTION	Brief explanation of each section.
	B	HOW TO USE THIS	Instructions on how to use this manual.
		MANUAL
	C	TROUBLE–	Describes the basic inspection procedures for electrical circuits.
		SHOOTING
	D	ABBREVIATIONS	Defines the abbreviations used in this manual.
		GLOSSARY OF
	E	TERMS AND	Defines the symbols and functions of major parts.
		SYMBOLS
	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	Describes position of Parts Connectors, Splice points, Ground points, etc.
		WIRING ROUTING	This section is closely related to the system circuit.
		INDEX	Index of the system circuits.
	H		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
		SYSTEM CIRCUITS	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	Describes power distribution from the power supply to various electrical loads.
		(Current Flow Chart)
	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	Indicates the part number of the connectors used in this manual.
		CONNECTORS
		OVERALL
	M	ELECTRICAL	Provides circuit diagrams showing the circuit connections.
		WIRING DIAGRAM

2

PRIUS (EM01R0U)

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 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

PRIUS (EM01R0U)

BHOW 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

	(BAT)
	15A
	STOP
	2
[B]	1

ECU	Actuatorwith
SkidControl
[D]

W – R

2

S6

Stop Light SW

1

G – W

G – W

G – W

7

[N]

(IG)

7.5A GAUGE

3	IB				4	IB
					R – L
		L	(S/D)		7	3C
				[C]			[G]
	14	IE1			15 3C
R	(W/G)	L	(S/D)		R – L		Meter
		L	(S/D)	[E]	4	Rear Lights	C7 Combination
	15	IE1
					13
				[F]	– G
					Y
				L4
8				Light Failure Sensor	4

2

[H]R–

G

	1	G – R	[I]
	BV1
G – R	R7 CombinationRear RHLight	G – R	R6 CombinationRear LHLight
Stop		Stop
4		3
3		6
W – B		W – B
	1	W – B
	BV1

W – B

BO [L]

50 [M]

1

11

[J]	– B	– B
	G	W
(Shielded)

2

H17

[K] High Mounted Stop Light

1

W – B

BL

4

PRIUS (EM01R0U)

B

[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

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

[D]: Indicates related system.

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

Outside numerals are pin numbers.

Female

Male ( )

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

[H] : Indicates the wiring color.

Wire colors are indicated by an alphabetical code.

B	= Black		W	= White	BR = Brown
L	= Blue		V	= Violet	SB = Sky Blue
R	= Red		G	= Green	LG = Light Green
P	=	Pink	Y	= Yellow	GR = Gray
O	=	Orange

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

Example: L – Y

L Y (Blue) (Yellow)

[I] : Indicates a wiring Splice Point

Example:

[J]: Indicates a shielded cable.

[K]: Indicates the pin number of the connector.

The numbering system is different for female and male connectors.

Example: Numbered in order	Numbered in order
from upper left to	from upper right to
lower right	lower left

Female

Male

[L] : Indicates a ground point.

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.

[M]: Page No.

[N]: Indicates the ignition key position(s) when the power is supplied to the fuse(s).

5

PRIUS (EM01R0U)

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] : Parts Location

Code		See Page	Code		See Page	Code	See Page
C7	34		L4	36		R7	37
H17	36		R6	37		S6	35

[Q]						: Relay Blocks
			Code				See Page		Relay Blocks (Relay Block Location)
	1						18		R/B No.1 (Instrument Panel Brace LH)
[R]						: Junction Block and Wire Harness Connector
			Code				See Page		Junction Block and Wire Harness (Connector Location)
			3C				22		Instrument Panel Wire and J/B No.3 (Instrument Panel Brace LH)
			IB				20		Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
[S]
						: 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 Room Left)

[T]: Ground Points

Code		See Page	Ground Points Location
BL	50		Under the Left Center Pillar
BO	50		Back Panel Center

6

PRIUS (EM01R0U)

B

[O]: Explains the system outline.

[P]: 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

Parts is 4th in order

Light Failure Sensor

[Q] : 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.

[R] : 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.

[S]: 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.

[T] : 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.

7

PRIUS (EM01R0U)

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

W–B

Cigarette Lighter

W–B

A

W–B

A/C Control Assembly

FAN MAIN Relay

5

W–B

O/D Main SW

W–B

A

W–B

Blower Motor

A/C Relay No.2

5

W–B

Clock

W–B

A

A W–B

W–B

Blower SW

A/C Relay No.3

5

W–B

A

A

W–B

Parking Brake SW

W–B

J 1

Radiator Fan Motor

Junction

Connector

W–B

7

W–B

Headlight Cleaner Relay

3B

Combination Meter

Headlight LH

W–B

W–B

W–B

7

W–B

W–B

Combination SW

Headlight RH

3C

W–B

W–B

W–B

1

W–B

Front Turn Signal Light RH

Front Fog Light RH

3D

Cruise Control ECU

W–B

W–B

W–B

3

W–B

Front Clearance Light RH

Front Fog Light LH

3F

Remote Control Mirror SW

W–B

W–B

W–B

13

W–B

Front Turn Signal Light LH

Brake Fluid Level SW

3G

Turn Signal Flasher

W–B

W–B

5

W–B

W–B

Front Clearance Light LH

3E

Defogger SW

W–B

W–B

2

W–B

6

W–B

Door Lock Control SW

IA1

3E

W–B

W–B

W–B

Combination SW

Door Courtesy SW RH

W–B

Door Lock Motor RH

W–B

W–B

W–B

W–B

Unlock Warning SW

10

EA2

Door Lock Control Relay

W–B

W–B

W–B

15

W–B

W–B

Power Window Master SW

ID1

W–B

Power Window Control

EA

Relay

Blower Resistor

W–B

W–B

W–B

Door Courtesy SW LH

W–B

W–B

8

W–B

W–B

Idle–Up SW

IB1

Door Lock Control SW

A/C Amplifier

W–B

W–B

W–B

W–B

Door Lock Motor LH

W–B (4A–GZE)

Fuel Control SW

4

4

BR

W–B

W–B

3

W–B

Radio and Player		4	4	IC3	Woofer Speaker Amplifier
	W–B				BR
HEATER Relay	4				Combination Meter
BR	5	BR		BR	BR
Auto Antenna Motor	BA1	4			Combination Meter

	W–B	BR	BR
4			Fuel Sender

W–B
IB	IC

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

8

PRIUS (EM01R0U)

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, Fues, etc.) and other parts

Battery	30A AM2	2	Fusible Link Block	6
	Starter	S 2
			100A ALT	6

Short Pin	2
15A EFI
10A HAZARD
	2
20A RADIO NO.1
10A HORN
60A ABS	5

10A ECU–B

2

7.5A DOME

Engine Room R/B (See Page 20)

	Fuse	System	Page
		ABS	194
		ABS and Traction Control	187
20A	STOP	Cruise Control	180
		Electronically Controlled Transmission	166
		Multiplex Communication System	210
		Cigarette Lighter	214
		Combination Meter	230
10A	DOME	Headlight	112
		Interior Light	122
		Key Reminder and Seat Belt Warning
		Light Auto Turn Off System
		Theft Deterrent and Door Lock Control

Power Source

		1		1.25B
	B		W	FL MAIN
		BA1
						Battery
				50A MAIN						7.5A DOME
	B		1	2	W	7	W	W	1	2	R
		2				EB1
					2				1		1
				7.5A AM1
	B		1	2	W – R	6
		2				EB1
					2			W
							– R
			15A HAZ–RADIO
							W
					W
			1	2
					2
							8	4

	AM1		AM2
				I8
				Ignition SW
ACC	IG1	ST1	IG2	ST2
	2

		20A DEFOG
B – Y	1	2	W – R
1			1

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

9

PRIUS (EM01R0U)

B HOW TO USE THIS MANUAL

K CONNECTOR LIST

	I14		[A]	I15					I16			[C]
Dark Gray									Gray
1	2	3	4			1	2	3	4	5	6	7
			1	2	3	4
			5	6	7	8

			[B]				[D]
		J1		J4		K1	K2		L1
		Black				Dark Gray
	A B B	D D	A	A	A	1
			A A A A		A		1	2	1	2
	A A B C C C D D

K CONNECTOR LIST

	BA1	Black		BD2				[F]
			[E]			Gray

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

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

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

[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.

[E]: Indicates the connector shapes which are used to join wire harnesses. On Left : Female connector shapes

On Right : Male connector shapes Numbers indicate pin numbers.

[F]: Indicates connector colors. (Connectors with not indicated colors are white)

10

PRIUS (EM01R0U)

B

L PART NUMBER OF CONNECTORS

Code

Part Name

Part Number

Code

Part Name

Part Number

A 1

A/C Ambient Temp. Sensor

90980–11070

D 4

Diode (Courtesy)

90980–11608

A 2

A/C Condenser Fan Motor

90980–11237

D 5

Diode (Interior Light)

90980–10962

A 3

A/C Condenser Fan Relay

90980–10940

D 6

Diode (Moon Roof)

90980–11608

A 4

A/C Condenser Fan Resistor

90980–10928

D 7

Door Lock Control Relay

90980–10848

A 5

A/C Magnetic Clutch

90980–11271

D 8

Door Lock Control SW LH

90980–11148

A

6

A/T Oil Temp.

Sensor

90980–11413

D 9

Door Lock Control SW RH

D10

7

ABS Actuator

90980–11151

Door Courtesy SW LH

[A]

[B]

[C]

90980–11097

90980–11009

D11

A 8

ABS Actuator

Door Courtesy SW RH

A 9

ABS Speed Sensor Front LH

90980–10941

D12

Door Courtesy SW Front LH

A10

ABS Speed Sensor Front RH

90980–11002

D13

Door Courtesy SW Front RH

90980–11156

A11

Airbag Sensor Front LH

90980–11856

D14

Door Courtesy SW Rear LH

A12

Airbag Sensor Front RH

D15

Door Courtesy SW Rear RH

A13

Airbag Squib

90980–11194

D16

Door Key Lock and Unlock SW LH

90980–11170

90980–11070

D17

Door Key Lock and Unlock SW RH

[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.

11

PRIUS (EM01R0U)

C TROUBLESHOOTING

To Ignition SW

IG Terminal

Fuse

[A]

SW 1

Voltmeter

[B]

Relay

[C]

SW 2

Solenoid

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.

Ohmmeter

SW

Ohmmeter

Diode

Digital Type				Analog Type

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.

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.

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

12

PRIUS (EM01R0U)

C

To Ignition SW

IG Terminal

Test Light	Fuse Case
	Short [A]
	SW 1
	Short [B]
Disconnect	Disconnect
Light	Relay
	Short [C]
	Disconnect
SW 2	Solenoid

FINDING A SHORT CIRCUIT

(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:

(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).

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

PRIUS (EM01R0U)

C TROUBLESHOOTING

Reference:
10
3		1
	0.2
1		(mm)
Example:	Up	Tool
(Case 1)

Terminal Retainer

Terminal Retainer
[Retainer at Full Lock Position]
Stopper	Terminal
	Retainer
[Retainer at Temporary Lock Position]
Example:	Secondary
(Case 2)	Locking Device

HOW TO REPLACE TERMINAL

(with terminal retainer or secondary locking device)

1. PREPARE THE SPECIAL TOOL

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

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.

[A]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.

”Case 1”

Raise the terminal retainer up to the temporary lock position.

”Case 2”

Open the secondary locking device.

14

PRIUS (EM01R0U)

C

		Tool
		Tab
		Tab
	Example:	Terminal
	(Case 1)		Tool
		Retainer

Tool	Access Hole
[Male]	(	Mark)	[Female]
	Retainer
	at Full Lock Position
Retainer
at Temporary Lock Position
[Male]			[Female]
Example:	Terminal Retainer
(Case 2)

		Tool	Tool
		Press Down	Press Down
	[Male]		[Female]

[B]For Waterproof Type Connector

HINT : Terminal retainer color is different according to connector body.

Example:

Terminal Retainer : Connector Body

Black or White	: Gray
Black or White	: Dark Gray
Gray or White	: Black

”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.

”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.

15

PRIUS (EM01R0U)

C TROUBLESHOOTING

Retainer at
Full Lock Position
Retainer at
Temporary Lock Position
[Male]	[Female]

Locking Lug

Tool

Push the terminal retainer down to the temporary lock position.

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

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.

16

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

5.CONNECT CONNECTOR

PRIUS (EM01R0U)

ABBREVIATIONS D

ABBREVIATIONS

The following abbreviations are used in this manual.

A/C	=	Air Conditioning
ABS	=	Anti–Lock Brake System
AVC–LAN =		Audio Visual Communication – Local Area Network
BA	=	Brake Assist
BEAN	=	Body Electronics Area Network
CAN	=	Controller Area Network
CHS	=	Coolant Heat Storage System
DC	=	Direct Current
EC	=	Electrochromic
ECU	=	Electronic Control Unit
EPS	=	Electric Motor Power Steering
ESA	=	Electronic Spark Advance
HID	=	High Intensity Discharge
HV	=	Hybrid Vehicle
IC	=	Integrated Circuit
INT	=	Intermittent
J/B	=	Junction Block
LH	=	Left–Hand
PTC	=	Positive Temperature Coefficient
R/B	=	Relay Block
RH	=	Right–Hand
SFI	=	Sequential Multiport Fuel Injection
SOC	=	State of Charge
SRS	=	Supplemental Restraint System
SW	=	Switch
TEMP.	=	Temperature
TRAC	=	Traction Control
VSC	=	Vehicle Stability Control
VSV	=	Vacuum Switching Valve
VVT–i	=	Variable Valve Timing–intelligent
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

PRIUS (EM01R0U)

E GLOSSARY OF TERMS AND SYMBOLS

	BATTERY		GROUND
	Stores chemical energy and		The point at which wiring attaches to
	converts it into electrical energy.		the Body, thereby providing a return
	Provides DC current for the auto’s		path for an electrical circuit; without a
	various electrical circuits.		ground, current cannot flow.
	CAPACITOR (Condenser)		HEADLIGHTS
	A small holding unit for temporary
		1. SINGLE	Current flow causes a headlight
	storage of electrical voltage.
		FILAMENT filament to heat up and emit light. A
			headlight may have either a single
			(1) filament or a double (2) filament
	CIGARETTE LIGHTER	2. DOUBLE
	An electric resistance heating
		FILAMENT
	element.
	CIRCUIT BREAKER		HORN
	Basically a reusable fuse, a circuit		An electric device which sounds a
	breaker will heat and open if too		loud audible signal.
	much current flows through it.
	Some units automatically reset when
	cool, others must be manually reset.
	DIODE		IGNITION COIL
	A semiconductor which allows		Converts low–voltage DC current
	current flow in only one direction.		into high–voltage ignition current for
			firing the spark plugs.
	DIODE, ZENER		LIGHT
	A diode which allows current flow in one
			Current flow through a filament
	direction but blocks reverse flow only up		causes the filament to heat up and
	to a specific voltage. Above that potential,
			emit light.
	it passes the excess voltage. This acts as
	a simple voltage regulator.
	PHOTODIODE		LED (LIGHT EMITTING DIODE)
	The photodiode is a semiconductor		Upon current flow, these diodes emit
	which controls the current flow		light without producing the heat of a
	according to the amount of light.		comparable light.
	DISTRIBUTOR, IIA		METER, ANALOG
	Channels high–voltage current from
			Current flow activates a magnetic
	the ignition coil to the individual
			coil which causes a needle to move,
	spark plugs.
			thereby providing a relative display
			against a background calibration.

FUSE			METER, DIGITAL
			Current flow activates one or many
	A thin metal strip which burns through
			LED’s, LCD’s, or fluorescent
	when too much current flows through it,	FUEL
			displays, which provide a relative or
	thereby stopping current flow and
	protecting a circuit from damage.		digital display.
FUSIBLE LINK
(for Medium Current Fuse)	A heavy–gauge wire placed in high		MOTOR
	amperage circuits which burns through on
			A power unit which converts
	overloads, thereby protecting the circuit.
		M	electrical energy into mechanical
	The numbers indicate the crosssection
			energy, especially rotary motion.
(for High Current Fuse or	surface area of the wires.
Fusible Link)

18

PRIUS (EM01R0U)

					E
	RELAY	SPEAKER
	Basically, an electrically operated		An electromechanical device which
	1. NORMALLYswitch which may be normally		creates sound waves from current
	CLOSED closed (1) or open (2).		flow.
	Current flow through a small coil
	creates a magnetic field which either
	opens or closes an attached switch.
	2. NORMALLY	SWITCH, MANUAL
	OPEN				Opens and closes
		1. NORMALLY			circuits, thereby
					stopping (1) or
			OPEN
					allowing (2) current
	RELAY, DOUBLE THROW				flow.
	A relay which passes current	2. NORMALLY
	through one set of contacts or the		CLOSED
	other.
	RESISTOR	SWITCH, DOUBLE THROW
	An electrical component with a fixed		A switch which continuously passes
	resistance, placed in a circuit to		current through one set of contacts
	reduce voltage to a specific value.		or the other.
	RESISTOR, TAPPED	SWITCH, IGNITION
	A resistor which supplies two or
			A key operated switch with several
	more different non adjustable
			positions which allows various
	resistance values.
			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)	SWITCH, WIPER PARK
	A resistor which varies its resistance		Automatically returns wipers to the
	with temperature.		stop position when the wiper switch
			is turned off.
	SENSOR, SPEED	TRANSISTOR
	Uses magnetic impulses to open		A solidstate device typically used as
	and close a switch to create a signal		an electronic relay; stops or passes
	for activation of other components.		current depending on the voltage
	(Reed Switch Type)		applied at ”base”.
	SHORT PIN	WIRES
	Used to provide an unbroken
				Wires are always drawn as
	connection within a junction block.	(1) NOT
				straight lines on wiring
		CONNECTED diagrams.
				Crossed wires (1) without a
				black dot at the junction are
	SOLENOID			not joined;
	An electromagnetic coil which forms			crossed wires (2) with a
				black dot or octagonal ( )
	a magnetic field when current flows,	(2) SPLICED
				mark at the junction are
	to move a plunger, etc.
				spliced (joined)
				connections.

19

PRIUS (EM01R0U)

F RELAY LOCATIONS

[Engine Compartment]

Engine Room R/B No.2

Engine Room R/B

Engine Room J/B

[Instrument Panel]

Certification ECU Center Connector	Tire Pressure	Power Steering Gateway ECU
No.1	Warning ECU	ECU
Power Source
Control ECU		ID Code Box
Daytime Running		Hybrid Vehicle
Light Relay
		Control ECU
Power Outlet		Engine Control
Relay
		Module
Mirror Heater		Center Connector
Relay
		No.2
Body ECU		Headlight Beam
ACC Relay		Level Control ECU
Driver		Transmission
		Control ECU
Side J/B
		Stereo Component
Skid Control		Amplifier
ECU
Navigation ECU
	Airbag Sensor Assembly A/C Control Assembly

20

PRIUS (EM01R0U)

F

[Body]

Occupant Classification ECU Overhead J/B

Door Control Receiver

Rear Wiper

Relay

Battery Fan

Relay

Tire Pressure

Warning

Antenna

and Receiver

System Main Relay

Battery ECU

Fusible Link Block

21

PRIUS (EM01R0U)

F RELAY LOCATIONS

	3 : Engine Room R/B	Engine Compartment Left (See Page 20)
	: Engine Room J/B
		Fuse Holder

* 1:15A (HID Type)

10A (Except HID Type)

*2:DIM Relay

*3:H-LP Relay

*4:ABS MTR 2 Relay

*5:ABS NO.2 Relay

*6:50A EPS (for High Current)

*7:40A HTR (for High Current)

*8:30A RDI (for High Current)

*9:50A PS HTR (for High Current)

*10:100A DC/DC (for High Current)

*11:30A ABS-2 (for High Current)

*12:30A P CON MTR (for High Current)

*13:40A HEAD MAIN (for High Current)

*14:60A P/I (for High Current)

CDS FAN				ABS MAIN1
2	30A	1			1	10A	2
PTC HTR1				ABS MAIN2
2	30A	1			1	10A	2
PTC HTR2				ABS MAIN3
2	30A	1			1	15A	2
	AMP				DOME
2	30A	1			1	15A	2
CHS W/P						HAZ
2	10A	1			1	10A	2
FR FOG				BATT FAN
2	15A	1			1	10A	2

			ETCS
3L		1	10A	2
		ABS-1
1	1	1	25A	2
		P CON MAIN

	(from Engine Room							1 7.5A 2
	Main Wire)
ABS MTR Relay
			3		2
ABS NO.1 Relay
			5	5		3
		1 4 2			1
P CON MTR Relay							*6	*11
	3	3			2
FAN NO.2 Relay
	5	5		5		3
	1 4 2	1	2		1		*7	*12
FAN NO.3 Relay
			*2				*8
			2		H-LP HI LH
					2 10A
		5		3		1
			1		2 10A
					H-LP HI RH		*9	*13
			*3		H-LP LO LH
			2		2	*1
		5	4	3		1
					2	*1		*14
					H-LP LO RH
			1
					2 7.5A 1
					DRL
				*4
				3
			2	1
				5			*10
				*5
				2				Unit A
			3	5
				1
Unit B	Unit C

22

PRIUS (EM01R0U)

F

Unit A

Back View

Side View

Top View

Side View

3M

1

(from Frame Wire)

(from Engine Room (from Engine Room
Main Wire)			Main Wire)
						1
1	2			1	2	(from Engine Room
3	4			3	4
						Main Wire)
3B				3C		3F
	3	4	3	4
	1	2	1	2

1

(from Engine

Room Main Wire)

3E

3D

1

(from Engine

Room Main Wire)

To Fuse Holder

3A

1

(from Engine Room Main Wire)

23

PRIUS (EM01R0U)

F RELAY LOCATIONS

	3 : Engine Room R/B	Engine Compartment Left (See Page 20)
	: Engine Room J/B
	Unit B

Top View Back View

	HEV
2	20A	1	1
			2
			3
			4
			5
			6
			7
			8
	HORN
2	10A	1
			1
			2
			3
			4
			5
	AM2		6
			7
2	15A	1	8

	EFI	1
2	15A	1

		1
		2
	3J	3
		4
		5
		6
		7
		8
		(from Engine Room
		Main Wire)
		1
		2
	3I	3
		4
		5
		6
		7
		8
		(from Engine Room
		Main Wire)
	3K	1
		(from Engine Room
		Main Wire)

Unit C

Top View

Back View

		5	8
			7
8	3G		6
			5
7
6			4
5
			3
4			2
			1
3
2		(from Engine Room
1
		Main Wire)
8			8
7			7
6	3H		6
5			5
4			4
3			3
2			2
1			1

(from Engine Room

Main Wire)

24

PRIUS (EM01R0U)

Memo

25

PRIUS (EM01R0U)

F RELAY LOCATIONS

[Engine Room R/B and Engine Room J/B Inner Circuit]

	Unit A		1	2
1 3M					1 3D
			100A DC/DC
					1	3E
1	2	1
	3A
		60A P/I
3	2	1		1	2	3B
	3B				1
	40A HEAD MAIN			50A PS HTR
				1	2	3B
					2
				30A RDI
	2	1		1	2
3 3C					1 3C
	30A P CON MTR			40A HTR
	2	1		1	2
4 3C					2 3C
	30A ABS-2			50A EPS
					1	3F
	Fuse Holder
	2	1		1	2	3
	3			10A HAZ
	10A ABS MAIN1
	2	1		1	2	3
	3			10A BATT FAN
	10A ABS MAIN2
	2	1		1	2	3
	3
	15A ABS MAIN3			10A ETCS
	2	1		1	2	3
	3
	15A DOME			25A ABS-1
	2	1		1	2	3
	3
	30A CDS FAN			7.5A P CON MAIN
	2	1		1	2	3
	3			30A AMP
	30A PTC HTR1
	2	1		1	2	3
	3			10A CHS W/P
	30A PTC HTR2
1	3L			1	2	3
				15A FR FOG

26

PRIUS (EM01R0U)

F

	Unit B	1	3J
	1	IGCT Relay
		2	3J
		4
	20A HEV
		3	3J
		2	3J
	1	HORN Relay
		2	3J
		8
	10A HORN
		7	3J
		1	3I
	1	IG2 Relay
		2	3I
	15A AM2	4
2	3I	3	3I
		5	3I
	1	EFI M Relay
1		2	3I
	3K	8
	15A EFI
6	3I	7	3I
	Unit C	1 3H
		AC W/P Relay
		4	3H
2 3H		3	3H
		5	3H
		BK/UP LP Relay
		8	3H
6 3H		7	3H
		1	3G
		FAN NO.1 Relay
		4	3G
2 3G		3	3G
		5	3G
		C/OPN Relay
		8	3G
6 3G		7	3G

27

PRIUS (EM01R0U)

F RELAY LOCATIONS

2 : Engine Room R/B No.2 Right Side of Reserve Tank (See Page 20)

	3	3		3		3		3		3
1	2	5		5		5		5		5
	1	2	1	2	1	2	1	2	1	2
	5

FR FOG Relay

PTC HTR 2 Relay

CHS W/P Relay

PS HTR Relay

PTC HTR 1 Relay

DRL NO.4

RR FOG Relay

Fusible Link Block

Luggage Room Right (See Page 21)

F16
2	2
1	1
	2	S
	1 5A	DC/DC-

120A MAIN

1 2

(for High Current)

F15

1	1

28

PRIUS (EM01R0U)

Memo

29

PRIUS (EM01R0U)