ABS – Troubleshooting
35B-12
4. INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
INSPECTION PROCEDURE 1
When the ignition key is turned to “ON” (engine stopped),
the ABS warning lamp does not illuminate.
Probable cause
The ABS-ECU turns the valve relay ON → OFF → ON for initial checking when
it is powered ON. Accordingly, the ABS warning lamp illuminates twice even if the
circuit between the ABS warning lamp and ABS-ECU is faulty.
The cause may be an open circuit in the lamp power supply circuit, a blown lamp,
an open circuit between the ABS warning lamp and ABS-ECU or between the ABS
warning lamp and the valve relay.
D Blown fuse
D Burn out ABS warning lamp bulb
D Malfunction of wiring harness or connector
OK
Check the trouble symptom.
NG
Replace the combination meter.
OK
Check the following connectors:
B-08, B-09
NG
Repair
OK
Check the trouble symptom.
NG
Check the harness wire, and repair
if necessary.
D Between ignition switch and ABS
warning lamp
OK
Check the motor for operation.
NG
Check the harness wire, and repair
if necessary.
D Between ABS warning lamp and
ABS-ECU
D Between ABS warning lamp and
valve relay
OK
Check the following connectors:
A-76, B-09, B-52
NG
Repair
OK
Measure at the combination meter con-
nector B-09.
D Disconnect the connector, and
measure at the combination meter
side connector.
D Ignition switch: ON
D ABS warning lamp condition when
terminal 12 is grounded.
OK: Illuminates
NG
Check whether the ABS warning lamp
bulb is burnt out.
NG
OK
Measure at the combination meter con-
nector B-08.
D Disconnect the connector and
measure at the harness side
connector.
D Ignition switch: ON
D Voltage between 42 and body
ground
OK: Battery voltage
NG
Check the following connectors:
B-08, B-75, B-76
NG
Repair
Fuse check
General-purpose fuse No.4
NG
Replace fuse after eliminating the
cause.
Replace the ABS warning lamp bulb.
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