Combination Switch: Testing and Inspection

Combination Switch Control Unit Input Test

1. Turn the ignition switch to LOCK (0).

2. Remove the driver's dashboard undercover Driver's Dashboard Undercover Removal / Installation, and the driver's dashboard lower cover Driver's Dashboard Lower Cover Removal / Installation, then remove the steering column covers Steering Column Removal/Installation.

3. Disconnect the 8P connector from the wiper/washer switch (combination switch control unit).





4. Inspect the connector and socket terminals to be sure they are all making good contact.

- If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
- If the terminals look OK, go to step 5.

5. Reconnect the connector to the wiper/washer switch, and do the following input tests.

- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, go to step 6.





6. Disconnect the 8P connector from the wiper/washer switch, and do the following input tests.

- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the combination switch control unit must be faulty, replace the wiper/washer switch.