Nissan Murano: Door & Lock :: Dtc/circuit Diagnosis / Unlock Sensor

Nissan Murano (Z52) 2015-2024 Service Manual / Body Exterior, Doors, Roof & Vehicle Security / Door & Lock :: Dtc/circuit Diagnosis / Unlock Sensor

Component Function Check

CHECK FUNCTION

CONSULT

  1. Select “UNLK SEN-DR” in “Data Monitor” mode of “BCM(INTELLIGENT KEY)”.

  2. Check that the function operates normally according to the following conditions:

Monitor Item Condition Status
UNLK SEN -DR Driver side door Lock OFF
Unlock ON

Is the inspection result normal?

YES>>

Unlock sensor is OK.

NO>>

Refer to Diagnosis Procedure.

Diagnosis Procedure

CHECK UNLOCK SENSOR INPUT SIGNAL

  1. Ignition switch OFF.

  2. Disconnect front door lock assembly LH connector.

  3. Check signal between front door lock assembly LH harness connector and ground with oscilloscope.

    (+) (–)

    Signal

    (Reference value)
    Front door lock assembly LH
    Connector Terminal
    D14 3 Ground

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 2.

CHECK UNLOCK SENSOR CIRCUIT

  1. Disconnect BCM connector.

  2. Check continuity between BCM harness connector and front door lock assembly LH harness connector.

    BCM Front door lock assembly LH Continuity
    Connector Terminal Connector Terminal
    M18 30 D14 3 Yes

  3. Check continuity between BCM harness connector and ground.

    BCM Ground Continuity
    Connector Terminal
    M18 30 No

Is the inspection result normal?

YES>>

Replace BCM. Refer to Removal and Installation.

NO>>

Repair or replace harness.

CHECK UNLOCK SENSOR GROUND CIRCUIT

Check continuity between front door lock assembly LH harness connector and ground.

Front door lock assembly LH Ground Continuity
Connector Terminal
D14 4 Yes

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace harness.

CHECK UNLOCK SENSOR

Refer to Component Inspection.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Replace front door lock assembly LH. Refer to Removal and Installation.

CHECK INTERMITTENT INCIDENT

Refer to Intermittent Incident.

>>

Inspection End.

Component Inspection

CHECK UNLOCK SENSOR

  1. Ignition switch OFF.

  2. Disconnect front door lock assembly LH connector.

  3. Check continuity between front door lock assembly LH terminals.

Front door lock assembly LH Condition Continuity
Terminal
3 4 Driver side door Unlock Yes
Lock No

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Replace front door lock assembly LH. Refer to Removal and Installation.

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