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Diagnosis Procedure

  1. CHECK FRONT DOOR SWITCH

    Check voltage between BCM connector and ground.

    VOLTAGE SPECIFICATION

    Terminals Door condition Voltage (V) (Approx.)
    (+) (-)
    BCM connector Terminal
    M18 12 Ground Front door RH OPEN 0
    CLOSE Battery voltage
    M19 47 Front door LH OPEN 0
    CLOSE Battery voltage
    Fig 1: Checking Voltage Between BCM Connector And Ground
    G04902774Courtesy of NISSAN MOTOR CO., U.S.A.

    Is the measurement value within the specification? 

    YES: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

    NO: GO TO 2

  2. CHECK HARNESS CONTINUITY
    1. Turn ignition switch OFF.
    2. Disconnect BCM and front door switch.
    3. Check continuity between BCM connector and front door switch connector.
      CONTINUITY SPECIFICATION

      BCM connector Terminal Front door switch connector Terminal Continuity
      M18 12 RH: B108 2 Yes
      M19 47 LH: B8
      Fig 2: Checking Continuity Between Front Door Switch Connector And Ground
      G04902775Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Check continuity between front door switch connector and ground.
      CONTINUITY SPECIFICATION

      Front door switch connector Terminal Ground Continuity
      B8 (LH) 2 No
      B108 (RH)

      Is the inspection result normal? 

    3. YES: GO TO 3

    NO: Repair or replace harness.

  3. CHECK BCM OUTPUT SIGNAL
    1. Connect BCM connector.
    2. Check voltage between BCM connector and ground.
      VOLTAGE SPECIFICATION

      Terminal Voltage (V) (Approx.)
      (+) (-)
      BCM connector Terminal
      M18 12 Ground Battery voltage
      M19 47
      Fig 3: Checking Voltage Between BCM Connector And Ground
      G04902774Courtesy of NISSAN MOTOR CO., U.S.A.

      Is the measurement value within the specification? 

      YES: GO TO 4

      NO: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

  4. CHECK FRONT DOOR SWITCH

    Check front door switch.

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

    NO: Replace front door switch.

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