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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis >> Body & Frame >> Exterior/Interior Trim >> Door And Lock (DTC/Circuit Diagnosis) >> DTC/Circuit Diagnosis >> B259B-00 Dr Touch Sensor >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK ONE TOUCH UNLOCK SENSOR INPUT SIGNAL 
      1. Ignition switch OFF.
      2. Disconnect front outside handle assembly LH connector.
      3. Check voltage between front outside handle assembly LH harness connector and ground.
        (+) (-) Voltage(Approx.)
        Front outside handle assembly LH
        Connector Terminal
        D11 5 Ground Battery Voltage

    Is the inspection result normal?

    YES>>

    GO TO 3.

    NO>>

    GO TO 2.

  2. CHECK ONE TOUCH UNLOCK SENSOR CIRCUIT 
      1. Disconnect BCM connector.
      2. Check continuity between BCM harness connector and front outside handle assembly LH harness connector.
        BCM Front outside handle assembly LH Continuity
        Connector Terminal Connector Terminal
        M19 92 D11 5 Yes
      3. Check continuity between BCM harness connector and ground.
        BCM Ground Continuity
        Connector Terminal
        M19 92 No

    Is the inspection result normal?

    YES>>

    Replace BCM. Refer to Removal and Installation .

    NO>>

    Repair or replace harness.

  3. CHECK ONE TOUCH UNLOCK SENSOR GROUND CIRCUIT 
    1. Check continuity between front outside handle assembly LH harness connector and ground.
      Front outside handle assembly LH Ground Continuity
      Connector Terminal
      D11 6 Yes

    Is the inspection result normal?

    YES>>

    GO TO 4.

    NO>>

    Repair or replace harness.

  4. CHECK ONE TOUCH UNLOCK SENSOR 
      1. Connect front outside handle assembly LH connector.
      2. Check signal between BCM harness connector and ground with oscilloscope.
        (+) (-) Condition Signal(Reference value)
        BCM
        Connector Terminal
        M19 92 Ground Driver door outside handle grip (backside) Touch
        GNSDB139217Courtesy of NISSAN NORTH AMERICA, INC.
        Other than the above Battery voltage

    Is the inspection result normal?

    YES>>

    GO TO 5.

    NO>>

    Replace front outside handle assembly LH. Refer to Removal and Installation .

  5. CHECK INTERMITTENT INCIDENT 
    1. Refer to Intermittent Incident .

    >>

    Inspection End.