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Home >> Infiniti >> 2017 >> Q50 Base, RWD >> Repair and Diagnosis >> Body & Frame >> Seats >> Automatic Drive Positioner (DTC/Circuit Diagnosis) (Except Hybrid) >> DTC/Circuit Diagnosis >> Lifting Sensor (Front) >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK LIFTING SENSOR (FRONT) SIGNAL

    1. Turn ignition switch ON.
    2. Read the voltage signal lifting sensor harness connector and ground with an oscilloscope.
      (+) (-) Condition Signal
      (Reference value)
      Driver seat control unit
      Connector Terminals
      B601 19 Ground Seat Lifting
      (front)      		 Operate
      GNSJMJIA3675ZZ-675Courtesy of NISSAN NORTH AMERICA, INC.
      Other than the above 0 or 5

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    GO TO STEP 3  .

  2. CHECK LIFTING SENSOR (FRONT) CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect driver seat control unit and lifting motor (front) connector.
    3. Check continuity between driver seat control unit harness connector and lifting motor (front) harness connector.
      Driver seat control unit Lifting motor (front) Continuity
      Connector Terminal Connector Terminal
      B601 19 B607 19 Existed
    4. Check continuity between driver seat control unit harness connector and ground.
      Driver seat control unit Ground Continuity
      Connector Terminal
      B601 19 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.

  3. CHECK LIFTING SENSOR (FRONT) POWER SUPPLY CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect lifting sensor control unit connector and lifting motor (front) connector.
    3. Check continuity between lifting sensor control unit harness connector and lifting motor (front) harness connector.
      Driver seat control unit Lifting motor (front) Continuity
      Connector Terminal Connector Terminal
      B601 12 B607 12 Existed
    4. Check continuity between driver seat control unit harness connector and ground.
      Driver seat control unit Ground Continuity
      Connector Terminal
      B601 12 Not existed

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    Repair or replace harness or connector.

  4. CHECK LIFTING SENSOR (FRONT) GROUND

    1. Turn ignition switch OFF.
    2. Check continuity between lifting motor (front) harness connector and ground.
      Lifting motor (front) Ground Continuity
      Connector Terminal
      B607 43 Existed

    Is the inspection result normal?

    YES 

    Replace lifting motor (front).

    NO 

    Repair or replace harness or connector.

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