warning lights TOYOTA LAND CRUISER 1986 Factory User Guide

F17718F18533
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 RHWA 1
A42 4
3A 5
3Q 12
C12
41
2E10
2A
1B91
1C AM2
W-RB-R
C12
C15
ECSB
BR8
IX1 3Q SB7MET
4
3EB-R
B-G
FL Block SB R-L
W-R
76AM2 IG2
J4
J/C
AA
2
F15Battery 1 10
MAIN ABS
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-627
820 Author
: Date
:
2004 LAND CRUISER (RM1071U)
ABS Warning Light Circuit
CIRCUIT DESCRIPTION
If the ECU detects trouble, it lights the ABS warning light while at the same time prohibiting ABS control. At
this time, the ECU records a DTC in memory.
Connect terminals Tc and E
1 of the DLC1 or Tc and CG of DLC3 to make the ABS warning light blink and
output the DTC.
WIRING DIAGRAM
DICA5-02

DI-628- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
821 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
HINT:
Troubleshoot in accordance with the table below for each trouble symptom.
ABS warning light does not light up*1
ABS 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 ABS 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 ABS 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 ABS warning light come on?
YES Repair ABS warning light bulb or combination
meter assembly.
NO

F16083
Cowl Side J/B RH
I18
Ignition SW ABS & BA
& TRAC
& VSC Actuator
Cowl Side J/B LH
Engine Room J/B
F15
FL Block
AM2
P8
Parking
Brake
SW Battery BrakeBRL A435
Y-G
3A 11
3Q6
SB
3E4 MET
3Q7
SB C1419
C1210
C151
C1420
2B20IX1
A A
A4213 2Q36
A40
LBL2
Y-G
2KR-W 27AM2 2A10
1B9
EC 2
MAIN6
IG2J4
J/CB-R Combination Meter
1 W-R
B-G
BR 8
SBSB
2E
2B41
4SB
7
PKB
R-W
1C1W-R
B-RABS & BA & TRAC
& VSC ECU
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-635
828 Author
: Date
:
2004 LAND CRUISER (RM1071U)
BRAKE Warning Light Circuit
CIRCUIT DESCRIPTION
The BRAKE warning light lights up while the brake fluid is insufficient and EBD is abnormal.
WIRING DIAGRAM
DICA7-02

DI-636- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
829 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Check parking brake switch circuit (See page BE-63).
NG Repair or replace parking brake switch circuit.
OK
2 Check brake fluid level warning switch circuit (See page BE-63).
NG Repair or replace brake fluid level warning
switch circuit.
OK
3 Is DTC output for ABS?
YES Repair circuit indicated by the output code.
NO
4 Do the warning lights other than BRAKE warning light come on?
YES Go to step 6.
NO

F00044
1
2
3 4
(+) (-) Continuity1 2
3 4
1
2
3 4 Open
Continuity
DI-640- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
833 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Do the warning lights other than SLIP 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).

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).

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