1998 TOYOTA LAND CRUISER Electric diagram

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.
FOREWORD
This wiring diagram manual has been prepared to provide
information on the electrical system of the 2004 LAND
CRUISER.
Applicable models: UZJ100 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.

2004 LAND CRUISER Repair Manual
Volume 1
Volume 2

2004 TOYOTA New Car Features
RM1071U1
RM1071U2
NCF257U
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.

2003
All rights reserved. This book may not be
reproduced or copied, in whole or in part, without
the written permission of Toyota Motor
Corporation.
2004 LAND CRUISER (EWD548U)
1
2004 LAND CRUISER
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. . . . . . . . . . . . . . .
68
SYSTEM CIRCUITS H. . . . . . . . . . . . . . . . . . . . . . . . . . .
93
GROUND POINT I. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
376
POWER SOURCE (Current Flow Chart) J. . . . . . . . .
384
CONNECTOR LIST K. . . . . . . . . . . . . . . . . . . . . . . . . . . .
394
PART NUMBER OF CONNECTORS L. . . . . . . . . . . . .
406
OVERALL ELECTRICAL WIRING DIAGRAM M. . . . .
410

2004 LAND CRUISER (EWD548U)
2A 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.

2004 LAND CRUISER (EWD548U)
3 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.

2004 LAND CRUISER (EWD548U)
9 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.
ACC
S 26
652
22
Battery30A AM2
StarterShort Pin
100A ALT Fusible Link Block
60A ABS10A ECU-B
7.5A DOME
15A EFI
10A HAZARD
20A RADIO NO.1
10A HORN
20A
10AFusePage
214
230
11 2
122 194
187
180
166
210 ABS
Cigarette Lighter
Combination Meter
Key Reminder and Seat Belt Warning
Light Auto Turn Off
Theft Deterrent and Door Lock ControlABS and Traction Control
Cruise Control
Electronically Controlled Transmission
Multiplex Communication System STOPSystem
DOMEHeadlight
Interior Light
3 EA2 1 EA1E 6
E 7
E 7
2
2
2
2 2
2 2
2 INJECTION Relay
STARTER Relay B
B
B B-O
1
1 2
23
4
3
4W-B W-B
B-W
B-W E 7
E 7B
BW1.25B FL MAIN
50A MAIN
7.5A AM2
15A HAZ-RADIO 2
22
2
2W
WEB1
EB17
6
W-RI 2 I 2 I 2
WW
W W W
1 1
1 140A DOOR LOCK CB
7.5A DOME 1W-L
R 1
1
2
431
1 1
1
111 G
G
W-R 15A TAIL
20A DEFOG
B-Y 84
32Ignition SW I 8
B-Y
11P-L Battery
15A RAD CIG2
TAIL
Relay
Power Source J POWER SOURCE (Current Flow Chart)
Engine Room R/B (See Page 20)
2
W W
B B B B B
W-R
WW W
G-WAM2
AM1 IG2
IG1W
W
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.
*The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.

2004 LAND CRUISER (EWD548U)
19 E
RELAY
Basically, an electrically operated
switch which may be normally
closed (1) or open (2).
Current flow through a small coil
creates a magnetic field which either
opens or closes an attached switch.
1. NORMALLY
CLOSED
2. NORMALLY
OPEN
SWITCH, MANUAL
Opens and closes
iitth b
SPEAKER
An electromechanical device which
creates sound waves from current
flow.
RELAY, DOUBLE THROW
A relay which passes current
through one set of contacts or the
other.
circuits, thereby
stopping (1) or
allowing (2) current
flow.1. NORMALLY
OPEN
2. NORMALLY
CLOSED
RESISTOR
An electrical component with a fixed
resistance, placed in a circuit to
reduce voltage to a specific value.SWITCH, DOUBLE THROW
A switch which continuously passes
current through one set of contacts
or the other.
RESISTOR, TAPPED
A resistor which supplies two or
more different non adjustable
resistance values.SWITCH, IGNITION
A key operated switch with several
positions which allows various
circuits, particularly the primary
ignition circuit, to become
operational.
RESISTOR, VARIABLE or RHEOSTAT
A controllable resistor with a variable
rate of resistance.
Also called a potentiometer or
rheostat.
SENSOR (Thermistor)
A resistor which varies its resistance
with temperature.SWITCH, WIPER PARK
Automatically returns wipers to the
stop position when the wiper switch
is turned off.
(Reed Switch Type)
SENSOR, SPEED
Uses magnetic impulses to open
and close a switch to create a signal
for activation of other components.TRANSISTOR
A solidstate device typically used as
an electronic relay; stops or passes
current depending on the voltage
applied at ºbaseº.
SHORT PIN
Used to provide an unbroken
connection within a junction block.WIRES
Wires are always drawn as
straight lines on wiring
diagrams.
Crossed wires (1) without a
black dot at the junction are
tj i d
(1) NOT
CONNECTED
SOLENOID
An electromagnetic coil which forms
a magnetic field when current flows,
to move a plunger, etc.
j
not joined;
crossed wires (2) with a
black dot or octagonal ( )
mark at the junction are
spliced (joined)
connections.
(2) SPLICED

2004 LAND CRUISER (EWD548U)
M OVERALL ELECTRICAL WIRING DIAGRAM
1
234
1 LAND CRUISER(
Cont. next page)
2A 1C 1A 1B
7. 5A AM1
2C 12E 39
1 2
5 3
1 2
5 3
2E 40
IFSet Bolt of Cowl Side
J/ B LH
7. 5A ACC2Q 57
10A GAUGE1
2Q 65 2E37 2Q772
7ACC
IG1
IG2
ST 2 AM13
4
6 AM2
6B 5
6D 26B 4
6D 3
4IX1
A A
3E 4 3Q 50 3Q51
3 4
2 1
1 2
3 5 3Q 39 3C1
7. 5A
SECURITY 20A P/ W (
FR)
3E 16 2
IISet Bolt of Cowl Side
J/B RH 3Q 52
3IX1
Bat tery
B- GB- GB- R L- BSBB- R
I18
B- R
SB B
IG1
NO. 3
Re la y ACC
CUT
Relay
SB
B- R
SB B- G
B- R
ACC Relay
120A
MAI N120A
J/B
NO. 3120A
J/B
NO. 1
140A
AL T120A
J/B
NO. 2
F1 5(
A)
, F16(
B)
, F17(
C)
B- G
B- G 10A ECU- I G1
2I 1 2Q 21
3 5
2 1
4
20A
DEFOG
IG1
NO. 2
Re la y
2D 24
7. 5A IDLE UP
2G 2
DE FOG Rel a y
3Q 7 3I 13E13K37 3E33
7. 5A MET
10A GAUGE220A P/W (
FL) 20A P/W (
RR) 20A P/W (
RL)
L
M
N
O
P A
B
DC
E
F
G
IH
K A A
LGL
L
L
L SB
SBB
SB
B- W
SB
SB
B- R
W- RL- BB
Rear Window
Defogger Sys tem
<11- 2>
J14J 4
Engine Contr ol
System< 4- 2>
L
L
SB
L L LG W- RB SB B- WSB SB B- G B- G
Power Source
3Q 72 3I
L
J
SB
SB
B- R
Ignition SW
Junction
Connector
Fusible Link Block
Junct ion
Connect or
25A DOOR
22 10
12SI G ACC
BDR1
Bo dy ECU B
6
7A
7A 5

2004 LAND CRUISER (EWD548U)
M OVERALL ELECTRICAL WIRING DIAGRAM
M u ltip le x C o m m u n ic a tio n S y s te m
1112
10 9
(
Cont. next page)
1 LAND CRUISER (
Cont' d)
10A
HEAD LH- LWR
1A
1 2
10A HEAD RH- LWR
1A
20A HEAD RH- UPR
1A
H 2
1
2H 4
1
2H 1
R- L R- BR- G
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
RLG
SB
SB
L
L
L
L
SB
SB
SB
L
W- R
B- G
B- G
W- B
SB
L- YB 7(
A)
, B 8(
B)
, B 9(
C)
F
G
H
I
J
K
L
M
N
O
P
Q
R
S SB
SB
LG
SB
SB
L
L
L
L
SB
SB
L
R- B
T
W- B 26 9 8
1 2
F 1
1
2F 2
R- B R- B
W- BEA Fr ont Right Side of
Fender ApronW- B W- B
1A 64 1A62 2
1 5A FR FOG
1C 1B591A 61 1A19
2A 16
2Q 53
FR FOG Rel a yG- Y SB
R- L
R- B
B- W1C 1
15A AM2
1B 9
30A BAT
1B 24
10A DOME 10A ECU- B2
3Q 17 3Q45 3Q71 3Q44 3B 25
E SBD R- WC W- B
U
V
W
X W- B
SB
L- Y 1B 22 1B107A
2G 9
2B 7
SB B- W
R- Y R- Y
R- W
W- B W- BR- B W- B
W- B
B- G
B- G
W- R
L- OSB
SB
SB
SB
W- BW- B W- B
Short Pin (
A)W- B HEAD HI
Relay
HEAD
Relay
DRL
1 2
TAIL Rel a y
7. 5A PANEL
1B 49 1B63
1A 24
1A 30
W- B
B
Taillight System
<8- 1>
SB
G2B 11
2Q 83SB
Front Fog Light
LH Front Fog Light
RH Headlight LH (
High)
Headlight LH
(
Low) Headlight RH (
Low)
Body ECU
12
20A HEAD LH- UPR
1A
A
R- W
R- W