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Limit Switch Check (Driver Side)

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check Driver Door Limit Switch Signal 
    1. Turn ignition switch ON.
    2. Check voltage between driver door control unit (LCU01) connector and ground.
      Fig 1: Terminals Connector Voltage Specifications
      G02340135Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 2: Checking Driver Door Limit Switch Signal
      G02340136Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: Limit switch circuit is OK.
    2. NG: Go to 2.

  2. Check Limit Switch Ground Circuit 
    1. Turn ignition switch OFF.
    2. Disconnect front power window regulator (driver side) connector.
    3. Check continuity between front power window regulator (driver side) connector D7 terminal 3 and ground.
      Fig 3: Checking Limit Switch Ground Circuit
      G02340137Courtesy of NISSAN MOTOR CO., U.S.A.
      1. 3 (B) - Ground: Continuity should exist. 

    OK or NG 

    1. OK: Go to 3.
    2. NG: Repair or replace harness.

  3. Check Harness Continuity 
    1. Disconnect driver door control unit (LCU01) connector.
    2. Check continuity between driver door control unit (LCU01) connector D8 terminal 7 and front power window regulator (driver side) connector D7 terminal 4.
      Fig 4: Checking Harness Continuity
      G02340138Courtesy of NISSAN MOTOR CO., U.S.A.
      1. 7 (PU) - 4 (PU): Continuity should exist. 
    3. Check continuity between driver door control unit (LCU01) connector D8 terminal 7 and ground.
      1. 7 (PU) - Ground: Continuity should not exist. 

    OK or NG 

    1. OK: Go to 4.
    2. NG: Repair or replace harness between driver door control unit (LCU01) and front power window regulator (driver side).

  4. Check Driver Door Control Unit Output Signal 
    1. Connect driver door control unit (LCU01) connector.
    2. Turn ignition switch ON.
    3. Check voltage between driver door control unit (LCU01) connector D8 terminal 7 and ground.
      Fig 5: Checking Driver Door Control Unit Output Signal
      G02340139Courtesy of NISSAN MOTOR CO., U.S.A.
      1. 7(PU) - Ground: Approx. 5V 

    OK or NG 

    1. OK: Replace front power window regulator (driver side).
    2. NG: Replace driver door control unit (LCU01).

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