Diagnosis Procedure
WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
Regarding Wiring Diagram information, refer to WIRING DIAGRAM .
NOTE:
If all of door motor DTCs are detected, check this circuit.
- CHECK EACH DOOR MOTOR COMMUNICATION SIGNAL
- Turn ignition switch ON.
- Check output waveform between A/C auto amp. harness connector and ground with the oscilloscope.
+ - Output waveform A/C auto amp. Connector Terminal M50 16 Ground Is the inspection result normal?
YES
GO TO STEP 2 .
NO
GO TO STEP 3 .
- CHECK EACH DOOR MOTOR COMMUNICATION SIGNAL CIRCUIT FOR OPEN
- Turn ignition switch OFF.
- Disconnect A/C auto amp. connector and intake door motor connector.
- Check continuity between A/C auto amp. harness connector and intake door motor harness connector.
A/C auto amp. Intake door motor Continuity Connector Terminal Connector Terminal M50 16 M128 2 Yes
Is the inspection result normal?
YES
Inspection End.
NO
Repair harness or connector.
- CHECK EACH DOOR MOTOR COMMUNICATION SIGNAL CIRCUIT FOR SHORT
- Disconnect following connectors.
- Air mix door motor (driver side)
- Air mix door motor (passenger side)
- Mode door motor (front)
- Rear shut-off door motor
- Air mix door motor (rear)
- Mode door motor (rear)
- Check continuity between A/C auto amp. harness connector and ground.
A/C auto amp. - Continuity Connector Terminal M50 16 Ground No
Is the inspection result normal?
YES
Replace A/C auto amp. Refer to REMOVAL AND INSTALLATION .
NO
Repair harness or connector.
- Disconnect following connectors.