2004 Infiniti Q45FACTORY OEM SERVICE PROCEDURE

Passenger Door Control Unit Circuit Check

  1. POWER SUPPLY CIRCUIT CHECK 
    1. Turn ignition switch OFF.
    2. Disconnect passenger door control unit connector.
    3. Check voltage between passenger door control unit connector D39 terminal 6 and ground.
      1. 6 (W/R) - Ground: Battery voltage 

      OK or NG

      1. OK: GO TO 2.
      2. NG: Check the following.
        • 40A fusible link (letter H. located in fuse and fusible link box).
        • Harness for open or short between passenger door control unit and fuse.
    Fig 1: Checking Voltage Between Passenger Door Control Unit Connector D39 Terminal 6 And Ground
    G02343840Courtesy of NISSAN MOTOR CO., U.S.A.
  2. GROUND CIRCUIT CHECK 

    Check continuity between passenger door control unit connector D39 terminal 7 and ground.

    1. 7 (B) - Ground: Continuity should exist. 

    OK or NG

    1. OK: GO TO 3.
    2. NG: Repair or replace harness.
    Fig 2: Checking Continuity Between Passenger Door Control Unit Connector D39 Terminal 7 And Ground
    G02343841Courtesy of NISSAN MOTOR CO., U.S.A.
  3. COMMUNICATION CIRCUIT CHECK 
    1. Disconnect driver door control unit connector.
    2. Check continuity between driver door control unit connector D8 terminal 5 and passenger door control unit connector D38 terminal 11.
      1. 5 (G/OR) -11 (G/OR): Continuity should exist. 

      OK or NG

      1. OK: INSPECTION END.
      2. NG: Repair or replace harness between door control unit and passenger door control unit.
    Fig 3: Checking Continuity Between Driver Door Control Unit Connector D8 Terminal 5 And Passenger Door Control Unit Connector D38 Terminal 11
    G02343842Courtesy of NISSAN MOTOR CO., U.S.A.
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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.

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