Nissan Murano: Heater & Air Conditioning Control System :: Dtc/circuit Diagnosis / Door Motor

Diagnosis Procedure

CHECK EACH DOOR MOTOR POWER SUPPLY

1. Ignition switch ON.

2. Check voltage between intake door motor harness connector and ground.

   +		−		Voltage (Approx.)
   Intake door motor
   Connector	Terminal
   M153	1	Ground		Battery voltage

Is the inspection result normal?

GO TO 2.

GO TO 3.

CHECK EACH DOOR MOTOR GROUND CIRCUIT

1. Ignition switch OFF.

2. Disconnect intake door motor connector.

3. Check continuity between intake door motor harness connector and ground.

   Intake door motor		—		Continuity
   Connector	Terminal
   M153	2	Ground		Yes

Is the inspection result normal?

Inspection End.

Repair harness or connector.

CHECK EACH DOOR MOTOR POWER SUPPLY CIRCUIT FOR OPEN

1. Disconnect A/C auto amp. connector.

2. 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
   M153	1	M50	17	Yes

Is the inspection result normal?

GO TO 4.

Repair harness or connector.

CHECK EACH DOOR MOTOR POWER SUPPLY CIRCUIT FOR SHORT

1. Disconnect following connectors:

   • Air mix door motor LH

   • Air mix door motor RH

   • Mode door motor

2. Check continuity between intake door motor harness connector and ground.

Is the inspection result normal?

Replace A/C auto amp. Refer to Removal and Installation.

Repair harness or connector.