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Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1434 (Body, Lock & Security System) >> Back Door Auto Closure System >> Close Switch Check
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Close Switch Check

WARNING: This page is about a different car, the 2005 Infiniti FX45 and 2005 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.
  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.
      Fig 1: Connector Terminal Reference Chart
      G02363729Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 2: Checking Signal Between Back Door Closure Control Unit Connector And Ground With Oscilloscope
      G02363730Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK : Close switch is OK.
    2. 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.
      1. 8 (L) - 5 (L) : Continuity should exist. 
    3. Check continuity between back door closure control unit connector D106 terminal 8 and ground.
      1. 8 (L) - Ground : Continuity should not exist. 
      Fig 3: Checking Harness Continuity
      G02363731Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK : GO TO 3.
    2. NG : Repair or replace harness.
  3. CHECK GROUND CIRCUIT 

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

    1. 8 (B) - Ground : Continuity should exist. 

    OK or NG 

    1. OK : GO TO 4.
    2. NG : Repair or replace harness.
    Fig 4: Checking Continuity Between Back Door Closure Motor Connector D109 Terminal 8 And Ground
    G02363732Courtesy of NISSAN MOTOR CO., U.S.A.
  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.
      1. Back door is closed 
      2. 8 (L) - Ground : Battery voltage 
      Fig 5: Checking Voltage Between Back Door Closure Control Unit Connector D106 Terminal 8 And Ground
      G02363733Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK : Replace back door lock assembly.
    2. NG : Replace back door closure control unit.
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