SWS ± Troubleshooting
54B-28
Inspection Procedure H-1
Headlamp washer: Headlamp washer does not work. Probable cause
The front-ECU operates the headlamp washers if the headlamp washer switch is
turned to ON while the headlamp relays (low and high) are ON and the ignition
switch is at the ACC or ON position.
If the headlamp washer does not work normally, the headlamp washer motor,
the column switch or the front-ECU may be defective.
D Malfunction of headlamp washer motor
D Malfunction of column switch
D Malfunction of front-ECU
D Malfunction of harness wire or connector
Is the windshield wiper and headlamp operated normally?
No
Check the defective operation. (Refer to P.54B-11, Trouble Symp-
tom Chart.)
Yes
MUT-II input signal check
D Headlamp washer switch
NG
Check the headlamp washer switch circuit. (Refer to P.54B-13,
Inspection Procedure N-13.)
OK
Check the headlamp washier motor. (Refer to GROUP 51 ± Head-
lamp Washer.)
NG
Replace
OK
Measure at headlamp washer motor connector A-21.
D Disconnect connector and measure at harness side.
D Continuity between terminal 2 and body earth.
OK: Continuity
NG
Check the following connector:
A-21
OK
Check trouble symptoms.
NG
Repair
NG
Check the harness wire between headlamp washer motor and
body earth.
OK
Measure at front-ECU connector A-37X.
D Disconnect connector and measure at relay box side.
D Voltage between terminal 9 and body earth.
OK: System voltage
NG
Check the following connector:
A-37X
NG
Repair
OK
Check trouble symptoms.
NG
Check the harness wire between front-ECU and fusible link (4).
NG
Repair
OK
Check trouble symptoms.
OK
Replace the front-ECU.
OK
Check the following connectors:
A-21, A-37X
NG
Check the harness wire between headlamp washer motor and
front-ECU.
NG
Repair
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