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SWS - Troubleshooting 54B-17 Inspection Procedure E-1 The windshield wipers do not work at all. Probable cause Either the windshield wiper motor, the column switch, or the front-ECU may be defective. D Windshield wiper motor fault D Column switch fault D front-ECU fault D Harness or connector fault OK Replace front-ECU. NO NG Replace MUT-II diagnosis code Is an ETACS-ECU diagnosis code output? YES Perform the inspection procedure for the diagnosis code (Refer to P.54B-3). NG Repair NG Check the harness between the windshield wiper motor and the body earth, and repair if necessary. OK Check the trouble symptoms. NG Repair NG Check the harness between the front-ECU and the ignition switch (IG2), and repair if necessary. OK Check the trouble symptoms. OK Measure at the front-ECU connector A-11X Disconnect the connector and test on the harness side. D Ignition switch ON D Continuity between terminal 30 and body earth. OK : System voltage NG Check the following connectors: A-11X, C-135, C-102, C-209, C-210 OK Measure at the windshield wiper motor connector B-01. Disconnect the connector and test on the harness side. D Continuity between terminal 5 and body earth. OK : Continuity confirmed. NG Check the following connector: B-01 Check the windshield wiper motor (Refer to GROUP 51 - Windshield Wipers and Washer). Inspection Procedure E-2 The windshield wipers only operate at LO speed (though the wipers and washer can be switched OFF). Probable cause If the windshield wipers only operate at LO speed regardless of the switch position, the windshield wiper fail-safe function is probably activated. Or the ETACS-ECU ignition switch (ACC) signal may be controlling the wiper operation. D Column switch fault D front-ECU fault D Harness or connector fault OK Replace front-ECU. MUT-II diagnosis code Is an ETACS-ECU diagnosis code output? YES Perform the inspection procedure for the diagnosis code (Refer to P.54B-3). Check the MUT-II input signals. Ignition switch (ACC) NG Check the ignition switch (ACC) input circuit system (Refer to P.54B-26, Inspection Procedure J-1). NO |