2004 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE

Check Trunk Open Signal

WARNING: This page is about a different car, the 2003 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK BCM OUTPUT SIGNAL 
    1. Remove electronic key from ignition key cylinder.
    2. Check voltage between BCM connector M4 terminal 109 (Y/B) and ground.
      Fig 1: Identifying BCM Connector And Ground Table
      G02022411Courtesy of NISSAN MOTOR CO., U.S.A.
      3. Fig 2: Checking Voltage Between BCM Connector M4 Terminal 109 (Y/B) And Ground
      G02022412Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK >> BCM output signal (trunk open signal) is OK.

    NG >> Replace BCM.

Factory Service Tools

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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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