lights TOYOTA LAND CRUISER 1998 Factory Owner's Guide

F17756
ABS & BA & TRAC
& VSC ECU
Cowl Side J/B RH Cowl Side J/B RH
Cowl Side J/B RH
I18
Ignition SW
Engine Room J/BCowl Side J/B LHCombination Meter
Cowl Side J/B LH
IG1 No.2 Relay
J/B No.2
MAIN
FL Block ECD4 Detection SW
(Center Diff. Lock)
BatteryVSC OFF
IFEC EXI
IG2
IG1
WT A43
A44
A42
A43 IX1
IGN
MET
IG1
AM2
AM1 ECU-IG1
ALTP-B
B-R
B-W
L-R
SB
BR SB
IX1
W-R B-R
SB
B-R
B-R L-B
B-R W-R
W-R
B-G
B-G3
A
AJ4
J/C
C15
C12
C13 3E
3B
3Q3Q
3B
3Q 3B
1C 1B 2A 2E
2E
2E 2B
2C
F1522
6
7 26
14 56
3 SB2
P-B
422
7
2
74
6
1910 41
2
1
5 37
18
391
217 101 W-B
IG2 AM1
AM28 2 1
3
F161
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-645
838 Author
: Date
:
2004 LAND CRUISER (RM1071U)
VSC OFF Indicator Light, Center Diff Lock Switch Circuit
CIRCUIT DESCRIPTION
This is the VSC control main switch. When the center differential is locked, VSC control goes off and the VSC
OFF indicator light lights up.
WIRING DIAGRAM
DICAA-02

DI-646- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
839 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 in case of using the hand-held tester and start from step 2 in case of not
using the hand-held tester.
1 Check operation of the VSC OFF indicator light.
PREPARATION:
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand-held tester main switch ON.
(c) Select the ACTIVE TEST mode on the hand-held tester.
CHECK:
Check that ºONº and ºOFFº of the VSC OFF indicator light can be shown on the combination meter with the
hand-held tester.
NG Go to step 3.
OK
2 Is DTC output for VSC?
YES Repair circuit indicated by the output code.
NO
3 Does the warning lights other than VSC OFF indicator light come on?
YES Go to step 5.
NO

DI-632- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
825 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
HINT:
Troubleshoot in accordance with the table below for each trouble symptom.
VSC TRAC warning light does not light up*1
VSC TRAC warning light remains on*2
*1: Start the inspection from step 1 in case of using the hand-held tester and start from step 2 in case of not
using the hand-held tester.
*
2: After inspection with step 4, start the inspection from step 5 in case of using the hand-held tester and
start from step 6 in case of not using hand-held tester.
1 Check operation of the VSC TRAC warning light.
PREPARATION:
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand-held tester main switch ON.
(c) Select the ACTIVE TEST mode on the hand-held tester.
CHECK:
Check that ºONº and ºOFFº of the VSC TRAC warning light can be shown on the combination meter on the
hand-held tester.
OK Check and replace skid control ECU.
NG
2 Does the warning lights other than VSC TRAC warning light come on?
YES Repair VSC TRAC warning light bulb or com-
bination meter assembly.
NO

DIC8N-01
Vehicle Brought to Workshop
Customer Problem Analysis
P. DI-503
Check and Clear DTC (Precheck)
P. DI-505Items inside
are titles of pages in this manual,
with the page number in the bottom portion. See
the pages for detailed explanations.
Problem Symptom ConfirmationSymptom Simulation
P. IN-26
Symptom
does not occur
Symptom
occurs
DTC Check
P. DI-505
Sensor CheckCircuit Inspection
P. DI-615 - DI-653
DTC Chart
P. DI-518 Malfunction codeProblem Symptoms Table
P. DI-526
Check for Fluid Leakage
P. DI-655
Identification of Problem
Normal code
Repair
Confirmation Test
End
1
2
3
4
5
67
89
10
11
Step 2, 5, 8, 9, 11:
Diagnostic steps permitting the use of the
hand-held tester or break-out-box.
Fail safe function:
When a failure occurs in the ABS & BA & TRAC & VSC systems, the ABS and VSC warning lights are lit and
ABS & BA & TRAC & VSC operation is prohibited. In addition to this, when the failure which disables EBD opera-
tion occurs, the BRAKE warning light is lit as well and EBD operation is prohibited. DI-502
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
695 Author
: Date
:
2004 LAND CRUISER (RM1071U)
ABS & VEHICLE STABILITY CONTROL (VSC) & BRAKE
ASSIST (BA) SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
Troubleshoot in accordance with the procedure on the following pages.

F17604
DIC8S-02
F02201N09214F05476
DLC1
E1
Tc
TcDLC3
CG
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-505
698 Author
: Date
:
2004 LAND CRUISER (RM1071U)
PRE-CHECK
1. DIAGNOSIS SYSTEM
(a) Check the warning lights and buzzer.
(1) Release the parking brake lever.
(2) When the ignition switch is turned ON, check that
the ABS, VSC TRAC and BRAKE warning lights,
VSC OFF, SLIP and TRAC indicator lights come on
for 3 sec.
(3) When depressing the brake pedal repeatedly, it
may turn on the ABS, VSC TRAC and BRAKE warn-
ing lights, VSC OFF indicator light and buzzer.
HINT:

If the ECU stores DTC, the ABS, VSC TRAC and BRAKE
warning lights and VSC OFF indicator light come ON.

If the indicator check result is not normal, proceed to trou-
bleshooting for the ABS warning light circuit, VSC TRAC
warning light circuit, brake warning light circuit, VSC OFF
indicator light circuit, SLIP indicator light circuit and AC-
TIVE TRAC indicator light circuit.
Trouble AreaSee Page
ABS warning light circuitDI-627
VSC TRAC warning light circuitDI-631
BRAKE warning light circuitDI-635
VSC OFF indicator light circuitDI-645
SLIP indicator light circuitDI-639
TRAC indicator light circuitDI-642
(b) In case of not using hand-held tester:
Check the DTC.
(1) Using SST, connect terminals Tc and E
1 of the
DLC1 or Tc and CG of the DLC3.
SST 09843-18020 or 09843-18040
(2) Turn the ignition switch ON.
(3) Read the DTC from the ABS or VSC TRAC warning
light on the combination meter.
HINT:

If no code appears, inspect the Tc circuit, ABS or VSC
TRAC warning light circuit.
Trouble AreaSee page
Tc circuitDI-651
ABS warning light circuitDI-627
VSC TRAC warning light circuitDI-631

D12773D13182
ECM
TFN E8
IU1 Combination Meter
19
SB
8Cowl Side J/B LH
EB1
D6
Detection SW
(Transfer Neutral Position)
W-B Y-G
1 2SBBJ/B No.4
B29
12 3
4F 4C 9
C15
C1520
5
EB1 W-B Y-GY-G1118
E8
E7 P-B 24 66
2Q2E
38 39
6D
6D J/B No. 6MPX1 MPX2
EC Y-G 10
If1 DI-500
- DIAGNOSTICSAUTOMATIC TRANSMISSION
693 Author
: Date
:
2004 LAND CRUISER (RM1071U)
A/T. P. (Automatic Transmission Parking) Indicator Circuit
CIRCUIT DESCRIPTION
The propeller shaft and wheels are free even when the transmission shift lever is set to P as long as the
transfer shift lever is in Neutral position. The A/T.P. indicator light lights up to warn the driver that the propeller
shaft and wheels are not locked.
If the A/T.P. indicator light goes on, the transfer shift lever should be shifted to the positions other than N
position.
WIRING DIAGRAM
DI3C7-07

- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-1001
1194 Author
: Date
:
2004 LAND CRUISER (RM1071U)
CRUISE MAIN Indicator Light Circuit
CIRCUIT DESCRIPTION
When the cruise control main switch is turned ON, CRUISE MAIN indicator light lights up.
INSPECTION PROCEDURE
1 Perform Active Test of hand-held tester.
PREPARATION:
Connect the hand-held tester to the DLC3.
CHECK:
Check the cruise indicator of the combination meter using Active Test.
OK:
DescriptionTester displayCheck condition
CRUISE Indicator lightCRUISE INDICON/OFF
OK Proceed to next circuit inspection shown on
problem symptom table (See page DI-991).
NG
Check and replace combination meter.
(See page IN-36).
DIB6D-01

A21366
Engine
Room
R/B11ECM
W
E9 11
C13
C12
SB10
Battery7
4I18
Ignition
Switch
73E
3Q 6
B-R
MET
Combination
Meter
Malfunction
Indicator
Lamp AM2IG2 AM2
W
B-RSB
2Q 2D32 78
Cowl Side
J/B RHA
AJ4
J/B W-R
2E 41
10
2A
W-R
1B 9
1C 1
F15 2
Fusible Link
Block B-G
120A MAIN
- DIAGNOSTICSENGINE
DI-355
548 Author
: Date
:
2004 LAND CRUISER (RM1071U)
MIL Circuit
CIRCUIT DESCRIPTION
If the ECM detects a trouble, the MIL lights up. At this time, the ECM records a DTC in the memory.
WIRING DIAGRAM
DIC2V-01

- DIAGNOSTICSENGINE
DI-357
550 Author
: Date
:
2004 LAND CRUISER (RM1071U)
3 Check that MIL lights up.
Check that MIL lights up when turning the ignition switch ON.
Standard: MIL lights up
OK System OK.
NG
4 Inspect combination meter assy (MIL circuit).
See the combination meter troubleshooting on page BE-63.
NG Repair or replace bulb or combination meter as-
sembly.
OK
Check and repair harness and connector be-
tween combination meter and ECM (See page
IN-36).

DI-280
- DIAGNOSTICSENGINE
473 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records the
engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help deter-
mine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean
or rich, as well as other data from the time when a malfunction occurred.
Hand-held tester:
1 Check operation of stop light.
CHECK:
Check if the stop lights come on and go off normally when the brake pedal is operated and released.
NG Check and repair stop light circuit.
OK
2 Check STOP fuse.
PREPARATION:
Remove the STOP fuse from the cowl side J/B LH.
CHECK:
Check the continuity of the STOP fuse.
OK:
Continuity
NG Check for short in all harness and components
connected to STOP fuse.
OK
3 Check stop light switch (See page BE-50).
NG Replace stop light switch.
OK