SWS ± Troubleshooting
54B-23
Inspection Procedure F-1
Windshield wiper and washer: Windshield wiper does not
operate.
Probable cause
If the windshield wiper does not work at all, the windshield wiper motor, column
switch or the front-ECU may be defective.
D Malfunction of windshield wiper motor
D Malfunction of column switch
D Malfunction of front-ECU
D Malfunction of harness wire or connector
MUT-II input signal check
D Windshield mist wiper switch
D Windshield intermittent wiper switch
D Windshield low-speed wiper switch
D Windshield high-speed wiper switch
NG
Check the defective input circuit. (Refer to P.54B-13, Defects Found
by Input Signal Check.)
OK
Check the windshield wiper motor. (Refer to GROUP 51 ± Wind-
shield Wiper and Washer.)
NG
Replace
OK
Check the installation of the windshield wiper motor to the vehicle
body.
NG
OK
Measure at front-ECU connector A-38X.
D Disconnect connector and measure at relay box side.
D Turn the ignition switch to ACC position.
D Voltage between terminal 24 and body earth.
OK: System voltage
NG
Check the following connectors:
A-38X, C-72, C-74
NG
Repair
OK
Check trouble symptoms.
NG
Check the harness wire between front-ECU and ignition switch
(ACC).
OK
Replace the front-ECU.
Repair
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