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.)
For diagnostic procedures, see MULTIPLEX CONTROL SYSTEMS article.
WINDSHIELD INTERMITTENT WIPER INSPECTION
- If the windshield intermittent wiper interval adjusting knob is operated, the wiper interval should change.
- Holding the windshield intermittent wiper interval adjusting knob, input the simulated vehicle speed with scan tool MB991502 and check that the wiper interval changes as the vehicle speed changes.
- If not, see «MULTIPLEX CONTROL SYSTEMS»(ref-169966) article.