Shorted Communication Line Test
Shorted Communication Line TestSpecial Tools Required
MFCS service connector 07WAZ-001010A
1. Remove the driver's multiplex control unit from the driver's under-dash fuse/relay box.
2. Carefully pry oft the driver's door switch trim
3. Disconnect door multiplex connector A (20P).
4. Disconnect passenger's multiplex control unit connector B (22P).
5. Check for continuity between No. 15 terminal of door multiplex connector A (20P) and body ground.
Is there continuity?
YES - Repair short to ground in the wire between door multiplex control unit connector and body ground.
NO - Go to step 6.
6. Check for continuity between B9 terminal of passenger's multiplex connector B (22P) and body ground.
Is there continuity?
YES - Repair short to ground in the wire between passenger's multiplex control unit connector and driver's multiplex control unit connector.
NO - Replace driver's multiplex control unit and recheck the symptom.