Multiplex Control Unit Input Test
Multiplex Control Unit Input TestDoor Unit:
1. Carefully pry off the driver's door switch trim.
2. Disconnect the connectors (A).
3. 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 4.
4. Make the following input tests at connector A (20P).
- 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.
Passenger's Unit
5. Remove the passenger's multiplex control unit from the passenger's under-dash fuse/relay box.
6. 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 7.
7. Make the following input tests at 22P connector B and the passenger's under-dash 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 8.
Driver's Unit:
8. Remove the driver's multiplex control unit from the driver's under-dash fuse/relay box.
9. 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 10.
10. Make the following input tests at 22P connector B and the driver's under-dash 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, troubleshoot the Multiplex Control System.