Check Trunk Open Signal

1. Remove electronic key from ignition key cylinder.
2. Check voltage between BCM connector M4 terminal 109 (LG) and ground.
   Fig 1: BCM Connector M4 Terminal And Ground Voltage

   Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

1. OK >> BCM output signal (trunk open signal) is OK.
2. NG >> Replace BCM.

Fig 2: Checking BCM Output Signal

Courtesy of NISSAN MOTOR CO., U.S.A.