Heater & Air Conditioning Control System (DTC/Circuit Diagnosis)
WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. 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
M58
3
Ground
Is the inspection result normal?
YES
GO TO 2.
NO
GO TO 3.
- CHECK INSTALLATION OF INTAKE DOOR MOTOR CONTROL LINKAGE
Check intake door motor control linkage is properly installed.
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 front air control connector.
- Check continuity between intake door motor harness connector and front air control harness connector.
Intake door motor
Front air control
Continuity
Connector
Terminal
Connector
Terminal
M58
3
M53
6
Yes
Is the inspection result normal?
YES
Replace front air control. Refer to Removal and Installation - Front Air Control .
NO
Repair harness or connector.