FOREWORD
This wiring diagram manual has been prepared to provide information on the electrical system of the 2002 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;
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Manual Name |
Pub. No. |
2002 |
PRIUS Repair Manual |
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Volume 1 |
RM883U1 |
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Volume 2 |
RM883U2 |
2002 |
TOYOTA New Car Features |
NCF214U |
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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.
2002 PRIUS (EWD464U)
A INTRODUCTION
This manual consists of the following 13 sections:
No. |
Section |
Description |
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INDEX |
Index of the contents of this manual. |
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A |
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INTRODUCTION |
Brief explanation of each section. |
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B |
HOW TO USE THIS |
Instructions on how to use this manual. |
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MANUAL |
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C |
TROUBLE± |
Describes the basic inspection procedures for electrical circuits. |
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SHOOTING |
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D |
ABBREVIATIONS |
Defines the abbreviations used in this manual. |
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GLOSSARY OF |
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E |
TERMS AND |
Defines the symbols and functions of major parts. |
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SYMBOLS |
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F |
RELAY LOCATIONS |
Shows position of the Electronic Control Unit, Relays, Relay Block, etc. |
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This section is closely related to the system circuit. |
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G |
ELECTRICAL |
Describes position of Parts Connectors, Splice points, Ground points, etc. |
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WIRING ROUTING |
This section is closely related to the system circuit. |
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INDEX |
Index of the system circuits. |
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H |
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Electrical circuits of each system are shown from the power supply through ground |
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points. Wiring connections and their positions are shown and classified by code |
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SYSTEM CIRCUITS |
according to the connection method. (Refer to the section, ºHow to use this manualº). |
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The ºSystem Outlineº and ºService Hintsº useful for troubleshooting are also contained |
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in this section. |
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I |
GROUND POINT |
Shows ground positions of all parts described in this manual. |
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J |
POWER SOURCE |
Describes power distribution from the power supply to various electrical loads. |
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(Current Flow Chart) |
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K |
CONNECTOR LIST |
Describes the form of the connectors for the parts appeared in this book. |
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This section is closely related to the system circuit. |
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L |
PART NUMBER OF |
Indicates the part number of the connectors used in this manual. |
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CONNECTORS |
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OVERALL |
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M |
ELECTRICAL |
Provides circuit diagrams showing the circuit connections. |
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WIRING DIAGRAM |
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2002 PRIUS (EWD464U)
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.
2002 PRIUS (EWD464U)
B HOW TO USE THIS MANUAL
[A] |
The system shown here is an EXAMPLE ONLY. It is different to the actual |
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circuit shown in the SYSTEM CIRCUITS SECTION. |
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STOP LIGHT
FROM POWER SOURCE SYSTEM (SEE PAGE 66) |
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15A |
7. 5A |
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STOP |
GAUGE |
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2 |
4 |
R±L |
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IB |
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[B] |
1 |
3 |
IB |
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[C] |
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W±R |
R (W/G) |
L (S/D) |
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2 |
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S 6 |
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STOP LIGHT SW |
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[E] |
[D] |
14 |
IE1 |
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1 |
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G±W |
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G±W |
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(S/D) |
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I 5 |
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L |
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TO ABS ECU |
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[F] |
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G±W |
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L 4 |
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7 |
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8 |
LIGHT FAILURE SENSOR |
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DELAY |
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CIRCUIT |
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2 |
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1 |
11 |
[I] |
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G±R |
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1 |
G±R |
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[J] |
G |
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BV1 |
B18 |
[K] |
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G±R |
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G±R |
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(SHIELDED) |
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7R |
LIGHTSTOPRH |
RH] |
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6R |
LIGHTSTOPRH |
LH] |
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W±B |
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COMB.[REARLIGHT |
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COMB.[REARLIGHT |
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2 |
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4 |
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4 |
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[L] |
H17 |
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HIGH MOUNTED |
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STOP LIGHT |
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1 |
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3 |
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3 |
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W±B |
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W±B |
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1 |
W±B |
B18 |
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W±B |
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BV1 |
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W±B |
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BO |
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[M] |
BL |
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50 |
[N] |
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7 3C
,@€À,,@@€ÀÀ€ ,@€À,,@@€ÀÀ€ ,@€À,,@@€ÀÀ€ ,@€À,,@@€ÀÀ€ ,@€À15,,@@€ÀÀ3C€
R±L 4
13 |
Y±G
4
[G]
C 7
REAR LIGHTS WARNING LIGHT [COMB. METER]
[H]
2002 PRIUS (EWD464U)
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, ºEº for the Engine Compartment, ºIº for the Instrument Panel and Surrounding area, and ºBº 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] : When 2 parts both use one connector in common, the parts connector name used in the wire routing section is shown in square brackets [ ].
[I]: Indicates the wiring color.
Wire colors are indicated by an alphabetical code.
B |
= Black |
W |
= White |
BR = Brown |
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L |
= Blue |
V |
= Violet |
SB = Sky Blue |
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R |
= Red |
G |
= |
Green |
LG = Light Green |
P |
= Pink |
Y |
= |
Yellow |
GR = Gray |
O |
= Orange |
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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)
[J]: Indicates a wiring Splice Point (Codes are ºEº for the Engine Room, ºIº for the Instrument Panel, and ºBº for the Body).
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 |
Numbered in order |
from upper left to |
from upper right to |
lower right |
lower left |
Female |
Male |
[M] : Indicates a ground point.
The first letter of the code for each ground point(s) indicates the component's location, e.g, ºEº for the Engine Compartment, ºIº for the Instrument Panel and Surrounding area, and ºBº for the Body and Surrounding area.
[N] : Page No.
2002 PRIUS (EWD464U)
B HOW TO USE THIS MANUAL
[O]SYSTEM OUTLINE
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Current is applied at all times through the STOP fuse to TERMINAL 2 of the stop light SW. |
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When the ignition SW is turned on, current flows from the GAUGE fuse to TERMINAL 8 of the light failure sensor, and also flows |
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through the rear lights warning light to TERMINAL 4 of the light failure sensor. |
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STOP LIGHT DISCONNECTION WARNING |
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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 |
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flowing from TERMINAL 7 of the light failure sensor to TERMINALS 1, 2 changes, so the light failure sensor detects the |
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disconnection and the warning circuit of the light failure sensor is activated. |
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As a result, the current flows from TERMINAL 4 of the light failure sensor to TERMINAL 11 to GROUND and turns the rear lights |
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warning light on. By pressing the brake pedal, the current flowing to TERMINAL 8 of the light failure sensor keeps the warning |
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circuit on and holds the warning light on until the ignition SW is turned off. |
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[P] |
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SERVICE HINTS |
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S6 STOP LIGHT SW |
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2±1 : Closed with the brake pedal depressed |
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L4 LIGHT FAILURE SENSOR |
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1, 2, 7±GROUND : Approx. 12 volts with the stop light SW on |
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4, 8±GROUND : Approx. 12 volts with the ignition SW at ON position |
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11±GROUND : Always continuity |
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[Q] |
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: PARTS LOCATION |
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Code |
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See Page |
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Code |
See Page |
Code |
See Page |
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C7 |
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34 |
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L4 |
36 |
R7 |
37 |
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H17 |
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36 |
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R6 |
37 |
S6 |
35 |
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[R] |
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: RELAY BLOCKS |
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Code |
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See Page |
Relay Blocks (Relay Block Location) |
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1 |
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18 |
R/B No.1 (Instrument Panel Left) |
[S] |
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,,@@€ÀÀ€ |
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR |
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Code |
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See Page |
Junction Block and Wire Harness (Connector Location) |
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IB |
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20 |
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel) |
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3C |
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22 |
Instrument Panel Wire and J/B No.3 (Instrument Panel Left Side) |
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[T] |
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: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS |
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Code |
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See Page |
Joining Wire Harness and Wire Harness (Connector Location) |
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IE1 |
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42 |
Floor Wire and Instrument Panel Wire (Left Kick Panel) |
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BV1 |
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50 |
Luggage Room Wire and Floor Wire (Luggage Compartment Left) |
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[U]: GROUND POINTS
Code |
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See Page |
Ground Points Location |
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BL |
50 |
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Under the Left Quarter Pillar |
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BO |
50 |
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Back Panel Center |
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[V]: SPLICE POINTS
Code |
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See Page |
Wire Harness with Splice Points |
Code |
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See Page |
Wire Harness with Splice Points |
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I5 |
44 |
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Cowl Wire |
B18 |
50 |
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Luggage Room Wire |
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2002 PRIUS (EWD464U)
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 ºL4º (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
[R] : Indicates the reference page showing the position on the vehicle of Relay Block Connectors in the system circuit.
Example : Connector º1º 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 º3Cº 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 ºIE1º 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 ºBOº 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 ºI5º is on the Cowl Wire Harness and is described on page 44 of this manual.
2002 PRIUS (EWD464U)
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
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W±B |
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FAN MAIN RELAY |
5 |
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FAN MAIN RELAY |
W±B |
E 3 |
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5 |
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W±B |
E 3 |
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A/C FAN RELAY NO.2 |
5 |
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A/C FAN RELAY NO.3 |
W±B |
E 3 |
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5 |
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RADIATOR FAN MOTOR |
W±B |
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E 3 |
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RETRACT CONTROL |
W±B |
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E 2 |
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RELAY |
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RETRACT MOTOR RH |
W±B |
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E 4 |
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RETRACT MOTOR LH |
W±B |
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E 5 |
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FRONT TURN SIGNAL |
W±B |
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E 4 |
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E 4 |
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LIGHT RH |
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PARKING LIGHT RH |
W±B |
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E 5 |
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FRONT TURN SIGNAL |
W±B |
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E 4 |
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E 6 |
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LIGHT LH |
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PARKING LIGHT LH |
W±B |
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DOOR LOCK CONTROL |
W±B |
W±B |
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B 4 |
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SW RH |
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DOOR KEY LOCK |
W±B |
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B 4 |
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SW RH |
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DOOR LOCK MOTOR |
W±B |
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B 4 |
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RH |
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DOOR LOCK CONTROL |
W±B |
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RELAY |
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BLOWER RESISTOR |
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W±B |
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ELECTRICAL IDLE-UP |
W±B |
W±B |
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I 4 |
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CUT RELAY (M/T) |
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A/C AMPLIFIER |
W±B |
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RADIO AND PLAYER |
BR |
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HEATER RELAY |
4 |
W±B |
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AUTO ANTENNA |
BR |
5 |
BR |
BA1 |
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MOTOR |
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CIGARETTE LIGHTER
O/D MAIN SW
CLOCK
W±B |
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FRONT SIDE MARKER |
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LIGHT RH |
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W±B |
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FRONT SIDE MARKER |
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LIGHT LH |
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W±B |
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BRAKE FLUID LEVEL |
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WARNING SW |
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W±B |
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2 |
W±B |
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IA1 |
I 4 |
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W±B |
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W±B |
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10 EA2 |
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W±B |
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EA |
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8 |
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IB1 |
I 8 |
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W±B |
W±B |
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4 |
4 |
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4 |
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4 |
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4 |
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4 |
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W±B |
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IB
W±B |
A |
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W±B |
HEATER CONTROL |
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ASSEMBLY |
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W±B |
A |
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I 6 |
HEATER SERVO |
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MOTOR AMPLIFIER |
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W±B |
A |
A |
I 6 |
BLOWER SW |
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A |
A |
W±B |
PARKING BRAKE SW |
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J 1 |
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JUNCTION |
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CONNECTOR |
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7 |
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W±B |
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3B |
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COMBINATION METER |
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W±B |
HORN SW [COMB. SW] |
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7 |
W±B |
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DIMMER SW |
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3C |
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I 2 |
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[COMB. SW] |
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1 |
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W±B |
CRUISE CONTROL |
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3D |
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MIRROR SW |
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W±B |
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3 |
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W±B |
REMOTE CONTROL |
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3F |
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MIRROR SW |
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13 |
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W±B |
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3G |
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TURN SIGNAL FLASHER |
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5 |
W±B |
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REAR WINDOW |
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3E |
I 2 |
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DEFOGGER SW |
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6 |
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LIGHT CONTROL SW |
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3E |
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I 2 |
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[COMB. SW] |
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I 5 |
W±B |
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WIPER AND WASHER |
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SW [COMB. SW] |
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W±B |
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UNLOCK WARNING |
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I 5 |
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SW |
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15 |
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POWER WINDOW |
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I 5 |
ID1 |
B 5 |
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MASTER SW |
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B 5 |
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POWER WINDOW |
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W±B |
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CONTROL RELAY |
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B 5 |
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DOOR KEY LOCK SW LH |
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B 5 |
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DOOR LOCK CONTROL |
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SW |
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DOOR LOCK MOTOR LH |
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W±B (4A±GZE) |
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I 5 |
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FUEL CONTROL SW |
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W±B |
3 |
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W±B |
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I 5 |
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IC3 |
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WOOFER AMPLIFIER |
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BR |
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COMBINATION METER |
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BR |
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BR |
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I 3 |
I 3 |
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COMBINATION METER |
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W±B |
BR |
BR |
FUEL SENDER |
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IC |
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The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.
2002 PRIUS (EWD464U)
B
The ºCurrent Flow Chartº 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.
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10A ECU±B |
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Short Pin |
2 |
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2 |
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7.5A DOME |
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15A EFI |
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Battery |
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30A AM2 |
2 |
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Fusible Link Block |
6 |
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10A HAZARD |
2 |
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Starter |
S 2 |
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20A RADIO NO.1 |
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10A HORN |
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100A ALT |
6 |
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60A ABS |
5 |
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Engine Room R/B (See Page 20)
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Fuse |
System |
Page |
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ABS |
194 |
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20A |
STOP |
ABS and Traction Control |
187 |
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Cruise Control |
180 |
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Electronically Controlled Transmission and A/T Indicator |
166 |
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Multiplex Communication System |
210 |
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Cigarette Lighter and Clock |
214 |
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Combination Meter |
230 |
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Headlight |
112 |
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10A |
DOME |
Interior Light |
122 |
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Key Reminder and Seat Belt Warning |
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Light Auto Turn Off |
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POWER SOURCE |
Theft Deterrent and Door Lock Control |
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E 6 |
W |
W |
3 EA2 |
1 EA1 |
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B |
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E 7 |
W±B |
B |
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E 7 |
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B |
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E 7 |
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B |
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E 7 |
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B |
W |
1.25B FL MAIN |
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BATTERY |
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50A MAIN |
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B |
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W |
7 |
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2 |
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2 |
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EB1 |
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B |
7.5A AM2 |
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W±R |
6 |
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2 |
2 |
EB1 |
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15A HAZ±RADIO |
W |
2 |
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INJECTION RELAY |
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B±O |
2 |
1 |
3 |
W±B |
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2 |
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B |
2 |
2 |
4 |
B±W |
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2 |
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STARTER RELAY |
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B |
2 |
1 |
3 |
W±B |
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2 |
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B |
2 |
2 |
4 |
B±W |
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2 |
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W |
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I 2 |
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W |
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W |
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I 2 |
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W±R |
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W |
8 |
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4 |
AM2 |
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AM1 |
IG2 |
ACC |
IG1 |
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3 |
2 |
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40A DOOR LOCK CB |
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W |
1 |
2 |
W±L |
1 |
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1 |
W |
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7.5A DOME |
R |
1 |
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1 |
W |
W |
I 2 |
1 |
W |
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1 |
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2 |
1 |
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TAIL |
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RELAY |
I 8 |
4 |
3 |
IGNITION SW |
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1 |
1 |
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G±W |
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1 |
G |
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15A TAIL |
G |
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1 |
B±Y |
20A DEFOG |
W±R |
1 |
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1 |
B±Y |
15A RAD CIG |
P±L |
1 |
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1 |
The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.
2002 PRIUS (EWD464U)
B HOW TO USE THIS MANUAL
K CONNECTOR LIST
I14 |
I15 |
[A] |
I16 |
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J1 |
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J2 |
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DARK GRAY |
GRAY |
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BLACK |
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1 |
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2 |
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1 |
2 |
A |
A |
A B B |
D D |
1 2 |
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A A A A |
A A B C C C D D |
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6 |
7 |
8 |
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[B]
J3
A B B D D A A B C C C D D
J4 |
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K1 |
K2 |
L1 |
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DARK GRAY |
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A |
A |
A |
1 |
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A A A A |
A |
1 |
2 |
1 |
2 |
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L2 |
L3 |
L4 |
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M1 |
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M2 |
M3 |
[C] |
GRAY |
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BLACK |
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1 |
1 2 |
3 |
4 5 |
1 |
2 |
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6 7 |
8 |
9 101112 |
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3 4 5 6 7 8 |
1 2 |
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2 |
1 |
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2 |
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3 4 |
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[D]
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M4 |
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N1 |
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N2 |
O1 |
O2 |
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GRAY |
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GRAY |
BLACK |
DARK GRAY |
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1 |
2 |
3 |
1 |
5 |
6 |
2 |
3 |
4 |
2 |
1 |
1 |
7 |
8 |
9 |
1 |
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10 |
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[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.
2002 PRIUS (EWD464U)
B
L PART NUMBER OF CONNECTORS
|
Code |
Part Name |
|
Part Number |
|
Code |
Part Name |
Part Number |
||||||||||
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A 1 |
A/C Ambient Temp. Sensor |
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90980±11070 |
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D 4 |
Diode (Door Courtesy Light) |
90980±11608 |
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A 2 |
A/C Condenser Fan Motor |
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90980±11237 |
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D 5 |
Diode (Key Off Operation) |
90980±10962 |
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A 3 |
A/C Condenser Fan Relay |
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90980±10940 |
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D 6 |
Diode (Luggage Compartment Light) |
90980±11608 |
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D 7 |
Door Lock Control Relay |
90980±10848 |
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A/C Triple Pressure SW (A/C Dual and |
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A 4 |
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90980±10943 |
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Single Pressure SW) |
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D 8 |
Door Courtesy Light LH |
90980±11148 |
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[A] |
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A/T Oil Temp. Sensor [B] |
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[C] |
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D 9 |
Door Courtesy Light RH |
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A 5 |
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90980±11413 |
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A 6 |
ABS Actuator |
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90980±11151 |
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D10 |
Door Courtesy SW LH |
90980±11097 |
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A 7 |
ABS Actuator |
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90980±11009 |
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D11 |
Door Courtesy SW RH |
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A 8 |
ABS Speed Sensor Front LH |
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90980±10941 |
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D12 |
Door Courtesy SW Front LH |
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A 9 |
ABS Speed Sensor Front RH |
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90980±11002 |
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D13 |
Door Courtesy SW Front RH |
90980±11156 |
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A10 |
Airbag Sensor Front LH |
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90980±11856 |
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D14 |
Door Courtesy SW Rear LH |
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A11 |
Airbag Sensor Front RH |
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D15 |
Door Courtesy SW Rear RH |
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A12 |
Auto Antenna Motor |
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90980±11194 |
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D16 |
Door Key Lock and Unlock SW LH |
90980±11170 |
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90980±11194 |
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D17 |
Door Key Lock and Unlock SW RH |
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[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 ªParts Catalog Newsº (published by Parts Engineering Administration Dept.).
2002 PRIUS (EWD464U)
C TROUBLESHOOTING
To Ignition SW
IG Terminal
Fuse
[A]
SW 1 |
Voltmeter |
[B]
Relay
[C]
SW 2 |
Solenoid |
Ohmmeter
SW
Ohmmeter
Diode
Digital Type |
Analog Type |
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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.
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.
2002 PRIUS (EWD464U)
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 |
2002 PRIUS (EWD464U)
C TROUBLESHOOTING
Reference: |
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10 |
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3 |
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1 |
1 |
0.2 |
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(mm) |
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Example: |
Up |
Tool |
(Case 1) |
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Terminal Retainer
Terminal Retainer |
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[Retainer at Full Lock Position] |
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Stopper |
Terminal |
Retainer |
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[Retainer at Temporary Lock Position] |
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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.
ºCase 1º
Raise the terminal retainer up to the temporary lock position.
ºCase 2º
Open the secondary locking device.
2002 PRIUS (EWD464U)
C
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Tool |
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Tab |
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Tab |
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Example: |
Terminal |
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(Case 1) |
Tool |
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Retainer |
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Tool |
Access Hole |
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[Male] |
( |
Mark) |
[Female] |
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Retainer |
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at Full Lock Position |
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Retainer |
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at Temporary Lock Position |
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[Male] |
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[Female] |
Example: |
Terminal Retainer |
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(Case 2) |
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Tool |
Tool |
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Press Down |
Press Down |
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[Male] |
[Female] |
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[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 |
ºCase 1º
Type where terminal retainer is pulled up to the temporary lock position (Pull Type).
Insert the special tool into the terminal retainer access hole ( Mark) 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.
ºCase 2º
Type which cannot be pulled as far as Power Lock insert the tool straight into the access hole of terminal retainer as shown.
2002 PRIUS (EWD464U)
C TROUBLESHOOTING
Retainer at |
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Full Lock Position |
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Retainer at |
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Temporary Lock Position |
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[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.
(b)Push the secondary locking device or terminal retainer in to the full lock position.
5.CONNECT CONNECTOR
2002 PRIUS (EWD464U)
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 |
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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 |
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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.
2002 PRIUS (EWD464U)
E GLOSSARY OF TERMS AND SYMBOLS
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BATTERY |
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GROUND |
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Stores chemical energy and |
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The point at which wiring attaches to |
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converts it into electrical energy. |
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the Body, thereby providing a return |
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Provides DC current for the auto's |
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path for an electrical circuit; without a |
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various electrical circuits. |
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ground, current cannot flow. |
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CAPACITOR (Condenser) |
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HEADLIGHTS |
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A small holding unit for temporary |
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1. SINGLE |
Current flow causes a headlight |
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storage of electrical voltage. |
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FILAMENT filament to heat up and emit light. A |
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headlight may have either a single |
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(1) filament or a double (2) filament |
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CIGARETTE LIGHTER |
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2. DOUBLE |
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An electric resistance heating |
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element. |
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FILAMENT |
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CIRCUIT BREAKER |
HORN |
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Basically a reusable fuse, a circuit |
An electric device which sounds a |
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breaker will heat and open if too |
loud audible signal. |
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much current flows through it. |
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Some units automatically reset when |
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cool, others must be manually reset. |
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DIODE |
IGNITION COIL |
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A semiconductor which allows |
Converts low±voltage DC current |
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current flow in only one direction. |
into high±voltage ignition current for |
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firing the spark plugs. |
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DIODE, ZENER |
LIGHT |
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A diode which allows current flow in one |
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Current flow through a filament |
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direction but blocks reverse flow only up |
causes the filament to heat up and |
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to a specific voltage. Above that potential, |
emit light. |
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it passes the excess voltage. This acts as |
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a simple voltage regulator. |
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PHOTODIODE |
LED (LIGHT EMITTING DIODE) |
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The photodiode is a semiconductor |
Upon current flow, these diodes emit |
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which controls the current flow |
light without producing the heat of a |
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according to the amount of light. |
comparable light. |
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DISTRIBUTOR, IIA |
METER, ANALOG |
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Channels high±voltage current from |
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Current flow activates a magnetic |
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the ignition coil to the individual |
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coil which causes a needle to move, |
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spark plugs. |
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thereby providing a relative display |
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against a background calibration. |
FUSE |
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METER, DIGITAL |
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Current flow activates one or many |
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A thin metal strip which burns through |
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LED's, LCD's, or fluorescent |
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when too much current flows through it, |
FUEL |
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displays, which provide a relative or |
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thereby stopping current flow and |
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digital display. |
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protecting a circuit from damage. |
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FUSIBLE LINK |
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(for Medium Current Fuse) |
A heavy±gauge wire placed in high |
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MOTOR |
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amperage circuits which burns through on |
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A power unit which converts |
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overloads, thereby protecting the circuit. |
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electrical energy into mechanical |
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The numbers indicate the crosssection |
M |
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energy, especially rotary motion. |
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(for High Current Fuse or |
surface area of the wires. |
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Fusible Link) |
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2002 PRIUS (EWD464U)
|
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E |
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RELAY |
SPEAKER |
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Basically, an electrically operated |
An electromechanical device which |
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1. NORMALLYswitch which may be normally |
creates sound waves from current |
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CLOSED closed (1) or open (2). |
flow. |
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Current flow through a small coil |
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creates a magnetic field which either |
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opens or closes an attached switch. |
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2. NORMALLY |
SWITCH, MANUAL |
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OPEN |
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Opens and closes |
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circuits, thereby |
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1. NORMALLY stopping (1) or |
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OPEN |
allowing (2) current |
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RELAY, DOUBLE THROW |
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flow. |
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A relay which passes current |
2. NORMALLY |
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through one set of contacts or the |
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CLOSED |
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other. |
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RESISTOR |
SWITCH, DOUBLE THROW |
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An electrical component with a fixed |
A switch which continuously passes |
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resistance, placed in a circuit to |
current through one set of contacts |
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reduce voltage to a specific value. |
or the other. |
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RESISTOR, TAPPED |
SWITCH, IGNITION |
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A resistor which supplies two or |
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A key operated switch with several |
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more different non adjustable |
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positions which allows various |
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resistance values. |
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circuits, particularly the primary |
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ignition circuit, to become |
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operational. |
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RESISTOR, VARIABLE or RHEOSTAT |
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A controllable resistor with a variable |
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rate of resistance. |
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Also called a potentiometer or |
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rheostat. |
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SENSOR (Thermistor) |
SWITCH, WIPER PARK |
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A resistor which varies its resistance |
Automatically returns wipers to the |
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with temperature. |
stop position when the wiper switch |
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is turned off. |
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SENSOR, SPEED |
TRANSISTOR |
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Uses magnetic impulses to open |
A solidstate device typically used as |
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and close a switch to create a signal |
an electronic relay; stops or passes |
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for activation of other components. |
current depending on the voltage |
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(Reed Switch Type) |
applied at ºbaseº. |
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SHORT PIN |
WIRES |
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Used to provide an unbroken |
Wires are always drawn as |
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connection within a junction block. |
(1) NOT |
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straight lines on wiring |
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CONNECTED diagrams. |
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Crossed wires (1) without a |
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black dot at the junction are |
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SOLENOID |
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not joined; |
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crossed wires (2) with a |
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An electromagnetic coil which forms |
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black dot or octagonal ( ) |
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a magnetic field when current flows, |
(2) SPLICED |
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mark at the junction are |
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to move a plunger, etc. |
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spliced (joined) |
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connections. |
2002 PRIUS (EWD464U)
F RELAY LOCATIONS
[Engine Compartment]
[Instrument Panel]
2002 PRIUS (EWD464U)
F
[Body]
2002 PRIUS (EWD464U)
F RELAY LOCATIONS
Fusible Link Block No.1 |
Engine Compartment Left (See Page 20) |
2002 PRIUS (EWD464U)
F
Fusible Link Block No.2 |
Luggage Room Left (See Page 21) |
2 : Engine Room R/B No.2 Right Side of Reserve Tank (See Page 20)
2002 PRIUS (EWD464U)
F RELAY LOCATIONS
3 : Engine Room R/B No.3 Engine Compartment Right (See Page 20)
2002 PRIUS (EWD464U)
MEMO
2002 PRIUS (EWD464U)
F RELAY LOCATIONS
: Engine Room J/B |
Engine Compartment Left (See Page 20) |
2002 PRIUS (EWD464U)
F
2002 PRIUS (EWD464U)
F RELAY LOCATIONS
[Engine Room J/B Inner Circuit]
2002 PRIUS (EWD464U)
F
2002 PRIUS (EWD464U)
F RELAY LOCATIONS
: Instrument Panel J/B Cowl Side Panel LH (See Page 20)
2002 PRIUS (EWD464U)