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HOMESERVICE MANUALSINFINITI2003FX45REPAIR AND DIAGNOSISSTEERINGSTEERING COLUMNAUTOMATIC DRIVE POSITIONERREAR LIFTING MOTOR CIRCUIT INSPECTION
2003 Infiniti FX45

Rear Lifting Motor Circuit Inspection

2003 Infiniti FX45SECTION Rear Lifting Motor Circuit Inspection
  1. CHECK REAR END SEAT LIFTING MECHANISM 

    Check the following.

    • Operation malfunction caused by lifter mechanism deformation or pinched harness or other foreign materials
    • Operation malfunction caused by foreign materials adhered to the lifter motor or lead screws
    • Operation malfunction and interference with other parts by poor installation

    OK or NG

    1. OK: GO TO 2.
    2. NG: Repair the malfunctioning part and check again.
  2. CHECK FUNCTION 

    With CONSULT-II 

    Check operation with "SEAT LIFTER RR" in ACTIVE TEST.

    Fig 1: CONSULT-II Display - SEAT LIFTER RR In ACTIVE TEST
    G03107586Courtesy of NISSAN MOTOR CO., U.S.A.
    TEST ITEM DESCRIPTION

    Test item Description
    SEAT
    LIFTER RR    		 The rear lifting motor is activated by receiving the drive signal.

    Without CONSULT-II 

    GO TO 3.

    OK or NG

    1. OK: Rear lifting motor check is OK.
    2. NG: GO TO 3.
  3. CHECK REAR LIFTING HARNESS CONTINUITY 
    1. Turn ignition switch OFF.
    2. Disconnect driver seat control unit connector and rear lifting motor connector.
    3. Check continuity between driver seat control unit connector B153 terminals 6 (G/W), 7 (G/B) and lifting motor connector B162 terminals 6 (G/W), 7 (G/B).

      6 (G/W) - 6 (G/W): Continuity should exist. 

      7 (G/B) - 7 (G/B): Continuity should exist. 

    4. Check continuity between driver seat control unit B153 terminals 6 (G/W), 7 (G/B) and ground.
      Fig 2: Checking Rear Lifting Harness Continuity
      G03107587Courtesy of NISSAN MOTOR CO., U.S.A.

      6 (G/W) - Ground: Continuity should not exist. 

      7 (G/B) - Ground: Continuity should not exist. 

    OK or NG

    1. OK: GO TO 4.
    2. NG: Repair or replace harness between driver seat control unit and rear lifting motor.
  4. CHECK DRIVER SEAT CONTROL UNIT OUTPUT SIGNAL 
    1. Connect the driver seat control unit and rear lifting motor.
    2. Check voltage between driver seat control unit connector and ground.
      Fig 3: Checking Driver Seat Control Unit Output Signal
      G03107588Courtesy of NISSAN MOTOR CO., U.S.A.
    TERMINAL VOLTAGE

    Connector Terminals (Wire color) Condition Voltage (V) (Approx.)
    (+) (-)
    B153 6 (G/W) Ground Rear lifting switch ON (UP operation) Battery voltage
    Rear lifting switch OFF 0
    7 (G/B) Rear lifting switch ON (DOWN operation) Battery voltage
    Rear lifting switch OFF 0

    OK or NG

    1. OK: Replace rear lifting motor.
    2. NG: Replace driver seat control unit.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.