ABS <4WD> ± Troubleshooting
35B-16
Inspection Procedure 3
When the ignition key is turned to ªONº (engine stopped),
the ABS warning lamp does not illuminate.
Probable cause
The cause may be an open circuit in the lamp power supply circuit, a blown lamp,
a malfunction of the ABS warning lamp relay or an open circuit between the ABS
warning lamp and the earth.
D Blown fuse
D Burn out ABS warning lamp bulb
D Malfunction of ABS warning lamp relay
D Malfunction of wiring harness or connector
D Malfunction of hydraulic unit and ABS-ECU
NG
Repair
NG
OK
NG
Replace the ABS warning
lamp bulb.
NG
Check the harness wire.
D Between ignition switch and combination meter
D Between combination meter and ABS warning lamp relay
NG
Replace the ABS warning
lamp relay.
NG
Repair
OK
Replace the hydraulic unit and ABS-ECU.
NG
Check the harness wire, and repair if necessary.
D Between ABS warning lamp relay and earth
OK
Check the trouble symp-
tom.
OK
Measure at the ABS warning lamp relay connector A-57.
D Disconnect the connector, and measure at the harness side
connector.
D Ignition switch: ON
D Continuity between 1 and body earth
OK: Continuity
NG
Check the following connector: A-57
OK
Check the trouble symp-
tom.
OK
Check the following connectors: A-57,
C-27 <L.H. drive vehicles>, C-40 <R.H. drive vehicles>,
C-07, C-06, C-02 <L.H. drive vehicles>, C-76, C-74
OK
ABS warning lamp relay check (Refer to P.35B-23.)
Measure at the ABS warning lamp relay connector A-57.
D Disconnect the connector, and measure at the harness side
connector.
D Ignition switch: ON
D ABS warning lamp condition when terminal 3 is earthed.
OK: Illuminates
Check whether the ABS warning lamp bulb is burnt out.
Fuse check
Multi-purpose fuse No.6
NG
Refer to GROUP 00 ± Inspection Service Points for Blown Fuse.
NG
Repair
OK
Replace the combination meter.
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