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HOMESERVICE MANUALSINFINITI2006FX35 AWDREPAIR AND DIAGNOSISBODY & FRAMEEXTERIOR BODY PANELSBODY, LOCK & SECURITY SYSTEMBACK DOOR AUTO CLOSURE SYSTEMCHECK CLOSE SWITCH
2006 Infiniti FX35 AWD

Check Close Switch

2006 Infiniti FX35 AWDSECTION Check Close Switch
  1. CHECK CLOSE SWITCH SIGNAL 
    1. Turn ignition switch OFF.
    2. Check the signal between back door closure control unit connector and ground with oscilloscope.
      CONNECTOR TERMINAL VOLTAGE REFERENCE

      Connector Terminals (Wire color) Back door condition Signal (Reference value)
      (+) (-)
      D106 8 (L) Ground Fully open --> fully closed
      G04077159
      Fig 1: Identifying Signal Between Back Door Closure Control Unit Connector And Ground
      G04077160Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK : Close switch is OK.

    NG : GO TO 2.

  2. CHECK HARNESS CONTINUITY 
    1. Disconnect back door closure control unit and back door closure motor connector.
    2. Check continuity between back door closure control unit connector D106 terminal 8 and back door closure motor connector D109 terminal 5.

      8 (L) - 5 (L) : Continuity should exist. 

    3. Check continuity between back door closure control unit connector D106 terminal 8 and ground.

      8 (L) - Ground : Continuity should not exist. 

      Fig 2: Identifying Continuity Between Back Door Closure Control Unit Connector D106 Terminal 8 And Ground
      G04077161Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK : GO TO 3.

    NG : Repair or replace harness.

  3. CHECK GROUND CIRCUIT 

    Check continuity between back door closure motor connector D109 terminal 8 and ground.

    8 (B) - Ground : Continuity should exist. 

    Fig 3: Identifying Continuity Between Back Door Closure Motor Connector D109 Terminal 8 And Ground
    G04077162Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK : GO TO 4.

    NG : Repair or replace harness.

  4. CHECK BACK DOOR CLOSURE CONTROL UNIT OUTPUT SIGNAL 
    1. Connect back door closure control unit connector.
    2. Check voltage between back door closure control unit connector D106 terminal 8 and ground.

      Back door is closed 

      8 (L) - Ground : Battery voltage 

    OK or NG 

    OK : Replace back door lock assembly.

    NG : Replace back door closure control unit.

    Fig 4: Identifying Voltage Between Back Door Closure Control Unit Connector D106 Terminal 8 And Ground
    G04077163Courtesy of NISSAN MOTOR CO., U.S.A.
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.