2002 Nissan-Datsun Sentra SE-R Spec VFACTORY OEM SERVICE PROCEDURE

Driver Door Control Unit Circuit Check

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 Power Supply Circuit 
    1. Turn ignition switch OFF.
    2. Disconnect driver door control unit (LCU01) connector.
    3. Check voltage between driver door control unit (LCU01) connector D8 terminal 14 and ground.
      Fig 1: Checking Power Supply Circuit
      G02340157Courtesy of NISSAN MOTOR CO., U.S.A.
      1. 14 (Y/G) - 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 driver control unit (LCU01) and fuse.

  2. Check Ground Circuit 
    Fig 2: Checking Ground Circuit
    G02340158Courtesy of NISSAN MOTOR CO., U.S.A.

    Check continuity between driver door control unit (LCU01) connector D8 terminal 15 and ground.

    1. 15 (B) - Ground: Continuity should exist. 

    OK or NG 

    1. OK: Inspection end
    2. NG: Repair or replace harness.

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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.