6. Check Encoder Circuit

1. Turn ignition switch OFF.
2. Disconnect auto trunk control unit and auto trunk motor connector.
3. Check continuity between auto trunk control unit connector B110 terminal 15 and auto trunk motor connector B109 terminal 8.
   1. 15 (Y) - 8 (Y) : Continuity should exist  .
4. Check continuity between auto trunk control unit connector B110 terminal 15 and ground.
   1. 15 (Y) - Ground : Continuity should not exist  .

OK or NG 

1. OK : Replace auto trunk motor.
2. NG : Repair or replace harness between auto trunk control unit and auto trunk motor.

Fig 1: Check Encoder Circuit

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