1. Power Supply Circuit Check

1. Turn ignition switch OFF.
2. Disconnect trunk closure control unit connector.
3. Check voltage between trunk closure control unit connector B56 terminal 2 and ground.
   1. 2 (PU) - Ground : Battery voltage 

OK or NG 

1. OK : GO TO 2.
2. NG : Check the following.
   • 20A fuse [No. 15, located in the fuse block (J/B) No. 1].
   • Harness for open or short between trunk closure control unit and fuse.

Fig 1: Checking Harness For Open Or Short

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