1998 TOYOTA LAND CRUISER warning light

F17760
J/B No. 7 D1
DLC1
Cowl Side J/B LH Cowl Side
J/B RHTC TC
E1
TC
CGA42 7D
7B 7D
IF
2D II EB3BP-B
W-BP-B P-B
W-B
W-B
W-B
1D7
DLC3
18
4 114
5
311
3
13ABS & BA & TRAC
& VSC ECU
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-651
844 Author
: Date
:
2004 LAND CRUISER (RM1071U)
Tc Terminal Circuit
CIRCUIT DESCRIPTION
Connecting terminals Tc and E1 of the DLC1 or Tc and CG of the DLC3 causes the ECU to display the DTC
by flashing the ABS warning light and VSC TRAC warning light.
WIRING DIAGRAM
DICAC-01

F05490
E1
Tc (-) (+) DLC1 ONON
DLC3
(-) (+)
Tc
CG
DI-652- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
845 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Check voltage between terminals Tc and E1 of DLC1 or Tc and CG of DLC3.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure voltage between terminals Tc and E1 of the
DLC1 or Tc and CG of the DLC3.
OK:
Voltage: 10 to 14 V
OK If ABS warning light does not blink even after Tc
and E
1 are connected, the ECU may be defec-
tive.
NG
2 IG switch OFF, and check for open and short circuit in harness and connector
between skid control ECU and DLC1 or DLC3, DLC1 or DLC3 and body ground
(See page IN-36).
NG Repair or replace harness or connector.
OK
Check and replace skid control ECU.

F00044
1
2
3 4
(+) (-) Continuity1 2
3 4
1
2
3 4 Open
Continuity
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-643
836 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Do the warning lights other than TRAC indicator light come on?
YES Go to step 3.
NO
2 Check IG1 No. 1 relay.
PREPARATION:
Remove the IG1 No. 1 relay from the engine room J/B.
CHECK:
Check continuity between the IG1 No. 1 relay terminals listed
in the table below.
OK:
Terminals 3 and 4Continuity
Terminals 1 and 2Open
CHECK:
(a) Apply battery positive voltage between terminals 3 and 4.
(b) Check continuity between terminals.
OK:
Terminals 1 and 2Continuity
NG Replace IG1 No. 1 relay.
OK
Check for open circuit in harness and connector between IG1 No. 1 relay and combination meter
(See page IN-36).

AB0119S08096F00446
E1
Ts DLC1 ON
(-)
(+)
DI-654- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
847 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Check voltage between terminals Ts and E1 of DLC1.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure voltage between terminals Ts and E
1 of the
DLC1.
OK:
Voltage: 10 to 14 V
OK If ABS warning light does not blink even after Ts
and E
1 are connected, the ECU may be defec-
tive.
NG
2 IG switch OFF, and check for open and short circuit in harness and connector
between skid control ECU and DLC1, DLC1 and body ground (See page IN-36
).
NG Repair or replace harness or connector.
OK
Check and replace skid control ECU.

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

F17765
ABS & BA & TRAC
& VSC ECU
Engine Room J/B Combination Meter
Cowl Side J/B RH
Cowl Side J/B LH
I18
Ignition SW
Cowl Side J/B RHVSCW 4
A43 18
3B 27
3Q
16
C13
41
2E10
2A1B9
1
1C AM2
W-R B-R
C12
C15
ECSB
BR8
IX1 3Q SB7MET
4
3EB-R
B-G
FL Block SB L-W
W-R
76 AM2 IG2
J4
J/C
AA
2
F15Battery 1 10 VSC TRAC
MAIN
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-631
824 Author
: Date
:
2004 LAND CRUISER (RM1071U)
VSC TRAC Warning Light Circuit
CIRCUIT DESCRIPTION
If the ECU stores DTC, the VSC TRAC warning light illuminates the combination meter.
WIRING DIAGRAM
DICA6-02

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

DI-634- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
827 Author
: Date
:
2004 LAND CRUISER (RM1071U)
4 Check that the ECU connectors are securely connected to the ECU.
NO Connect the connector to the ECU.
YES
5 Check operation of the VSC TRAC warning light (See step 1).
OK Check and replace skid control ECU.
NG
6 Is DTC output?
Check the DTC on page DI-505.
YES Repair circuit indicated by the output code.
NO
7Check for short circuit in harness and connector between VSC TRAC warning light and
skid control ECU (See page IN-36).
NG Repair or replace harness or connector.
OK
Check and repair skid control ECU.