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Home >> Infiniti >> 2011 >> QX56 AWD >> Repair and Diagnosis >> Body & Frame >> Seats >> Automatic Drive Positioner System >> DTC/Circuit Diagnosis >> Reclining Sensor >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK RECLINING SENSOR SIGNAL
    1. Turn ignition switch ON.
    2. Read voltage signal between driver seat control unit harness connector and ground with oscilloscope.
      VOLTAGE SPECIFICATION

      (+) (-) Condition Signal (Reference value)
      Driver seat control unit
      Connector Terminals
      B452 4 Ground Seat reclining Operate
      G07022274Courtesy of NISSAN MOTOR CO., U.S.A.
      Other than the above 0 or 5

      Is the inspection result normal? 

      YES: Replace driver seat control unit.

      NO: Go to 2.

  2. CHECK RECLINING SENSOR CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect driver seat control unit and reclining motor connector.
    3. Check continuity between driver seat control unit harness connector and reclining motor harness connector.
      CONTINUITY SPECIFICATION

      Driver seat control unit Reclining motor Continuity
      Connector Terminal Connector Terminal
      B452 4 B454 4 Existed
    4. Check continuity between driver seat control unit harness connector and ground.
      CONTINUITY SPECIFICATION

      Driver seat control unit Ground Continuity
      Connector Terminal
      B452 4 Not existed

      Is the inspection result normal? 

      YES: Go to 3.

      NO: Repair or replace harness or connector.

  3. CHECK RECLINING SENSOR POWER SUPPLY
    1. Connect driver seat control unit connector.
    2. Turn ignition switch ON.
    3. Check voltage between reclining motor harness connector and ground.
      VOLTAGE SPECIFICATION

      (+) (-) Voltage (V) (Approx.)
      Reclining motor
      Connector Terminals
      B454 12 Ground 12

      Is the inspection result normal? 

      YES: Go to  5.

      NO: Go to 4.

  4. CHECK RECLINING SENSOR POWER SUPPLY CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect driver seat control unit connector.
    3. Check continuity between driver seat control unit harness connector and reclining motor harness connector.
      CONTINUITY SPECIFICATION

      Driver seat control unit Reclining motor Continuity
      Connector Terminal Connector Terminal
      B452 12 B454 12 Existed
    4. Check continuity between driver seat control unit harness connector and ground.
      CONTINUITY SPECIFICATION

      Driver seat control unit Ground Continuity
      Connector Terminal
      B452 12 Not existed

      Is the inspection result normal? 

      YES: Replace driver seat control unit.

      NO: Repair or replace harness or connector.

  5. CHECK RECLINING SENSOR GROUND CIRCUIT
    1. Turn ignition switch OFF.
    2. Check continuity between reclining motor harness connector and ground.
      CONTINUITY SPECIFICATION

      Reclining motor Ground Continuity
      Connector Terminal
      B454 43 Existed

      Is the inspection result normal? 

      YES: Replace reclining motor.

      NO: Repair or replace harness or connector.

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