2001 TOYOTA PRIUS Service Repair Manual

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.
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.
2001 PRIUS (EWD414U)
FOREWORD
This wiring diagram manual has been prepared to provide
information on the electrical system of the 2001 PRIUS.
Applicable models: NHW11 Series
For service specifications and repair procedures of the above
models other than those listed in this manual, refer to the
following manuals;
Manual Name
Pub. No.

2001 PRIUS Repair Manual
Volume 1
Volume 2

2001 PRUIS New Car Features
RM778U1
RM778U2
NCF182U
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.

2001 PRIUS (EWD414U)
A INTRODUCTION
This manual consists of the following 13 sections:
No.
SectionDescription
A
INDEXIndex of the contents of this manual.
A
INTRODUCTIONBrief explanation of each section.
BHOW TO USE THIS
MANUALInstructions on how to use this manual.
CTROUBLE±
SHOOTINGDescribes the basic inspection procedures for electrical circuits.
DABBREVIATIONSDefines the abbreviations used in this manual.
E
GLOSSARY OF
TERMS AND
SYMBOLS
Defines the symbols and functions of major parts.
FRELAY LOCATIONSShows position of the Electronic Control Unit, Relays, Relay Block, etc.
This section is closely related to the system circuit.
GELECTRICAL
WIRING ROUTINGDescribes position of Parts Connectors, Splice points, Ground points, etc.
This section is closely related to the system circuit.
INDEXIndex of the system circuits.
H
SYSTEM CIRCUITS
Electrical circuits of each system are shown from the power supply through ground
points. Wiring connections and their positions are shown and classified by code
according to the connection method. (Refer to the section, ºHow to use this manualº).
The ºSystem Outlineº and ºService Hintsº useful for troubleshooting are also contained
in this section.
IGROUND POINTShows ground positions of all parts described in this manual.
JPOWER SOURCE
(Current Flow Chart)Describes power distribution from the power supply to various electrical loads.
KCONNECTOR LISTDescribes the form of the connectors for the parts appeared in this book.
This section is closely related to the system circuit.
LPART NUMBER OF
CONNECTORSIndicates the part number of the connectors used in this manual.
M
OVERALL
ELECTRICAL
WIRING DIAGRAM
Provides circuit diagrams showing the circuit connections.

2001 PRIUS (EWD414U)
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.

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W±R
7. 5A
GAUGE
1 2
34
4 8 7
2111134
1 2
3 4
1 2
B18
BL FROM POWER SOURCE SYSTEM (SEE PAGE 66)
R±L
R±L G
W±B W±B
W±B
W±BW±B
W±B
Y±GR
L 4
H17
R 6
DELAY
CIRCUIT S 6
B18
3 4
R 7
BV11
G±W G±R
G±R
G±R
G±R
G±W
G±W
(W/G)
(S/D) (S/D)
C 7
(SHIELDED) BV11I 5
L L
STOP LIGHT
15
7
TO ABS ECU
BO
50
15A
STOP
IBIB
REAR LIGHTS
WARNING LIGHT
[COMB. METER] 3C 3C
IE1 14 STOP LIGHT SW
STOP LIGHT RH
[REAR COMB. LIGHT RH]
STOP LIGHT RH
[REAR COMB. LIGHT LH]
HIGH MOUNTED
STOP LIGHT
[A]
[B]
[I]
[D]
[F]
[H]
[E]
[J]
[M]
[N][K]
[L]
[G]
[C]
LIGHT FAILURE SENSOR
2001 PRIUS (EWD414U)
B HOW TO USE THIS MANUAL
*The system shown here is an EXAMPLE ONLY. It is different to the actual
circuit shown in the SYSTEM CIRCUITS SECTION.