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 .
- CHECK EACH DOOR MOTOR POWER SUPPLY
- Turn ignition switch ON.
- Check voltage between intake door motor harness connector and ground.
+ - Voltage
(Approx.)Intake door motor Connector Terminal M128 1 Ground Battery voltage Is the inspection result normal?
YES
GO TO STEP 2 .
NO
GO TO STEP 3 .
- CHECK EACH DOOR MOTOR GROUND CIRCUIT
- Turn ignition switch OFF.
- Disconnect intake door motor connector.
- Check continuity between intake door motor harness connector and ground.
Intake door motor - Continuity Connector Terminal M128 3 Ground Yes
Is the inspection result normal?
YES
Inspection End.
NO
Repair harness or connector.
- CHECK EACH DOOR MOTOR POWER SUPPLY CIRCUIT FOR OPEN
- Disconnect A/C auto amp. connector.
- Check continuity between intake door motor harness connector and A/C auto amp. harness connector.
Intake door motor A/C auto amp. Continuity Connector Terminal Connector Terminal M128 1 M50 17 Yes
Is the inspection result normal?
YES
GO TO STEP 4 .
NO
Repair harness or connector.
- CHECK EACH DOOR MOTOR POWER SUPPLY 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 intake door motor harness connector and ground.
Intake door motor - Continuity Connector Terminal M128 1 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.