Door Motor Communication Circuit

DOOR MOTOR COMMUNICATION CIRCUIT





Diagnosis Procedure

NOTE:
If all of door motor DTCs are detected, check this circuit.
1.CHECK EACH DOOR MOTOR COMMUNICATION SIGNAL
1. Turn ignition switch ON.
2. Check output waveform between A/C auto amp. harness connector and ground with the oscilloscope.





Is the inspection result normal?
YES - GO TO 2.
NO - GO TO 3.
2.CHECK EACH DOOR MOTOR COMMUNICATION SIGNAL CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector and intake door motor connector.
3. Check continuity between A/C auto amp. harness connector and intake door motor harness connector.





Is the inspection result normal?
YES - INSPECTION END
NO - Repair harness or connector.
3.CHECK EACH DOOR MOTOR COMMUNICATION SIGNAL CIRCUIT FOR SHORT
1. Disconnect following connectors.
- Front air mix door motor LH
- Front air mix door motor RH
- Front mode door motor
- Upper vent door motor
- Rear air mix door motor
- Rear mode door motor
2. Check continuity between A/C auto amp. harness connector and ground.





Is the inspection result normal?
YES - Replace A/C auto amp.. Service and Repair.
NO - Repair harness or connector.