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Check Front Lifting Sensor Circuit

  1. CHECK FUNCTION

    With CONSULT-III 

    Check operation with "LIFT FR PULSE" on the DATA MONITOR to make sure the pulse changes.

    MONITOR ITEM REFERENCE

    Monitor item [OPERATION or UNIT] Contents
    LIFT FR PULSE - The front lifting position (pulse) judged from the lifting sensor (front) is displayed

    Without CONSULT-III 

    1. Turn ignition switch OFF.
    2. Check signal between driver seat control unit connector and ground, with oscilloscope.
      TERMINAL CONDUCTION CHART

      Sliding sensor front lifting sensor Terminals Condition Signal (Reference value)
      (+) (-)
      B214 25 Ground Front lifting motor operation
      G04902547Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 1: Checking Signal Between Driver Seat Control Unit Connector And Ground
      G05212932Courtesy of NISSAN MOTOR CO., U.S.A.

      OK or NG 

      OK: Sliding sensor front lifting sensor is OK.

      NG: GO TO 2.

  2. CHECK FRONT LIFTING MOTOR SENSOR CIRCUIT HARNESS CONTINUITY
    1. Disconnect driver seat control unit and sliding sensor front lifting sensor connector.
    2. Check continuity between driver seat control unit connector and sliding sensor front lifting sensor connector.
      CONTINUITY CHART

      A B Continuity
      Driver seat control unit connector Terminal Sliding sensor front lifting sensor connector Terminal
      B204 25 B214 25 Yes
      31 31B
      Fig 2: Checking Continuity Between Driver Seat Control Unit Connector And Sliding Sensor Front Lifting Sensor Connector And Ground
      G05212933Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Check continuity between driver seat control unit connector and ground.
      CONTINUITY CHART

      A Ground Continuity
      Driver seat control unit connector Terminal
      B204 25 No
      31

      OK or NG 

      OK: GO TO 3.

      NG: Repair or replace harness.

  3. CHECK DRIVER SEAT CONTROL UNIT OUTPUT
    1. Connect driver seat control unit connector.
    2. Check voltage between driver seat control unit connector and ground.
      VOLTAGE SPECIFICATION

      Terminals Voltage (V) (Approx.)
      (+) (-)
      Driver seat control unit connector Terminal
      B204 25 Ground 5

      OK or NG 

      OK: Replace sliding sensor front lifting sensor.

      NG: Replace automatic drive positioner control unit.

      Fig 3: Checking Voltage Between Driver Seat Control Unit Connector And Ground
      G05212934Courtesy of NISSAN MOTOR CO., U.S.A.