3. Check Encoder Ground

1. Turn ignition switch OFF.
2. Disconnect auto trunk motor connector.
3. Check continuity between auto trunk motor connector B109 terminal 9 and ground.
   1. 9 (R/W) - Ground : Continuity should exist  .

OK or NG 

1. OK : GO TO 5.
2. NG : GO TO 4.

Fig 1: Checking Continuity Between Auto Trunk Motor Connector B109 Terminal 9 And Ground

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