Door Motor Communication Circuit

DOOR MOTOR COMMUNICATION CIRCUIT

Diagnosis Procedure

Regarding Wiring Diagram information, refer to "Wiring Diagram" Automatic Air Conditioning.
NOTE:
If all 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.
-Air mix door motor LH
-Air mix door motor RH
-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. Refer to "Removal and Installation" Removal And Installation.
NO- Repair harness or connector.