Diagnosis Procedure
WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
- 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
M227
1
Ground
Battery voltage
Is the inspection result normal?
YES
GO TO 2 .
NO
GO TO 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
M227
2
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 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
M227
1
M132
13
Yes
Is the inspection result normal?
YES
GO TO 4 .
NO
Repair harness or connector.
- CHECK EACH DOOR MOTOR POWER SUPPLY CIRCUIT FOR SHORT
- Disconnect following connectors:
- Air mix door motor
- Mode door motor
- Check continuity between intake door motor harness connector and ground.
Intake door motor
(-)
Continuity
Connector
Terminal
M227
1
Ground
No
Is the inspection result normal?
YES
Replace front air control. Refer to Removal and Installation .
NO
Repair harness or connector.
- Disconnect following connectors: