Windshield Washer Control Module: Testing and Inspection
Wiper/Washer Control Unit Input Test1. Before testing the wiper/washer control functions, troubleshoot the multiplex control system.
Multiplex Control Unit, Driver's:
2. Remove the driver's multiplex control unit from the [1][2]driver's under-dash fuse/relay box, and disconnect its connector.
3. Inspect all connector and socket terminals to be sure they are 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 4.
4. With the driver's unit still disconnected, make these input tests at the connector and fuse/relay box socket.
- 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 5.
5. Reconnect the connector to the driver's unit, and make this input test at the connector.
- If the test indicates a problem, find and correct the cause, then recheck the system.
- If the test proves OK, go to step 6.
Multiplex Control Unit, Passenger's:
6. Remove the [1][2]passenger's under-dash fuse/relay box.
7. Remove the passenger's multiplex control unit from the [1][2]passenger's under-dash fuse/relay box, and disconnect its connector.
8. 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 9.
9. With the passenger's unit still disconnected, make these input tests at the connector and fuse/relay box socket.
- If a test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the control unit must be faulty; replace it.