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Home › Infiniti › 2012 › EX35 Base, 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. Check voltage signal between driver seat control unit harness connector and ground with oscilloscope.
      (+) (-) Condition Voltage (V) (Approx.)
      Driver seat control unit
      Connector Terminal
      B451 9 Ground Seat reclining Operate
      G05223234Courtesy of NISSAN NORTH AMERICA, INC.
      Other than above 0 or 5

      Is the inspection result normal? 

      YES: Replace driver seat control unit. Refer to "REMOVAL AND INSTALLATION ".

      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.
      Driver seat control unit Reclining motor Continuity
      Connector Terminal Connector Terminal
      B451 9 B454 9 Existed
    4. Check continuity between driver seat control unit harness connector and ground.
      Driver seat control unit Ground Continuity
      Connector Terminal
      B451 9 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 (V) (Approx.)
      Reclining motor
      Connector Terminal
      B454 16 Ground Battery voltage

      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.
      Driver seat control unit Reclining motor Continuity
      Connector Terminal Connector Terminal
      B451 16 B454 16 Existed
    4. Check continuity between driver seat control unit harness connector and ground.
      Driver seat control unit Ground Continuity
      Connector Terminal
      B451 16 Not existed

      Is the inspection result normal? 

      YES: Replace driver seat control unit. Refer to "REMOVAL AND INSTALLATION ".

      NO: Repair or replace harness or connector.

  5. CHECK RECLINING SENSOR GROUND
    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.
      Driver seat control unit Reclining motor Continuity
      Connector Terminal Connector Terminal
      B451 31 B454 31 Existed

      Is the inspection result normal? 

      YES: Replace reclining motor.

      NO: Repair or replace harness or connector.

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