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

Nissan Murano (Z52) 2015-2024 Service Manual / Ventilation, Heater & Air Conditioner / Heater & Air Conditioning Control System :: Dtc/circuit Diagnosis / Door Motor Communication Circuit

Diagnosis Procedure

NOTE:

If all of door motor DTCs are detected, check this circuit.

CHECK EACH DOOR MOTOR COMMUNICATION SIGNAL

  1. Ignition switch ON.

  2. Check output waveform between A/C auto amp. harness connector and ground with the oscilloscope.

    + − Output waveform
    A/C auto amp.
    Connector Terminal
    M50 16 Ground

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

GO TO 3.

CHECK EACH DOOR MOTOR COMMUNICATION SIGNAL CIRCUIT FOR OPEN

  1. Ignition switch OFF.

  2. Disconnect A/C auto amp. connector and intake door motor connector.

  3. Check continuity between A/C auto amp. harness connector and intake door motor harness connector.

    A/C auto amp. Intake door motor Continuity
    Connector Terminal Connector Terminal
    M50 16 M153 3 Yes

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Repair harness or connector.

CHECK EACH DOOR MOTOR COMMUNICATION SIGNAL CIRCUIT FOR SHORT

  1. Disconnect following connectors:

    • Air mix door motor LH

    • Air mix door motor RH

    • Mode door motor

  2. Check continuity between A/C auto amp. harness connector and ground.

    A/C auto amp. — Continuity
    Connector Terminal
    M50 16 Ground No

Is the inspection result normal?

YES>>

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

NO>>

Repair harness or connector.

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