Diagnosis Procedure
WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK INTAKE DOOR MOTOR COMMUNICATION SIGNAL
- Turn ignition switch ON.
- Check output waveform between intake door motor harness connector and ground with the oscilloscope.
+
-
Output waveform
Intake door motor
Connector
Terminal
M128
2
Ground
Is the inspection result normal?
YES
GO TO 2.
NO
GO TO 3.
- CHECK INSTALLATION OF INTAKE DOOR MOTOR
Check intake door motor is properly installed. Refer to Exploded View .
Is the inspection result normal?
YES
Replace intake door motor. Refer to Removal and Installation .
NO
Repair or replace malfunctioning part.
- CHECK INTAKE DOOR MOTOR COMMUNICATION SIGNAL CIRCUIT
- Turn ignition switch OFF.
- Disconnect intake door motor and 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
2
M50
16
Yes
Is the inspection result normal?
YES
Replace A/C auto amp. Refer to Removal and Installation .
NO
Repair harness or connector.