Diagnosis

WINDSHIELD WIPER AND WASHER DIAGNOSIS
The windshield wiper and washer are controlled by the Simplified Wiring System (SWS). For troubleshooting, refer to SWS Diagnosis.

NOTE: Even when the ETACS-ECU has failed, the windshield wiper can work at low speed as fail-safe mode. (Normally, the windshield wiper operates when the ignition switch is at the "ACC" position. But, if it enters the fail-safe mode, the wiper can operate only when the ignition switch is at the "ON" position.)

Refer to: Information Bus