Check Closure Motor

1. Turn ignition switch OFF.
2. Check the signal between back door closure control unit connector and ground with oscilloscope.
   CONNECTOR TERMINAL VOLTAGE REFERENCE
   
   

   Connector	Terminals (Wire color)		Back door condition	Signal (Reference value)
   	(+)	(-)
   D106	2 (PU)	Ground	Fully closed --> fully open
   	3 (G)		Fully open --> fully closed

   Fig 1: Identifying Signal Between Back Door Closure Control Unit Connector And Ground

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

OK or NG 

OK : GO TO 2.

NG : Replace back door closure control unit.

1. Disconnect back door closure control unit and back door closure motor connector.
2. Check continuity between back door closure control unit connector D106 terminals 2, 3 and back door closure motor connector D109 terminals 1, 2.

   2 (PU) - 1 (PU) : Continuity should exist. 

   3 (G) - 2 (G) : Continuity should exist. 

3. Check continuity between back door closure control unit connector D106 terminals 2, 3 and ground.

   2 (PU) - Ground : Continuity should not exist. 

   3 (G) - Ground : Continuity should not exist. 

   Fig 2: Identifying Continuity Between Back Door Closure Control Unit Connector D106 Terminals 2, 3 And Ground

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

OK or NG 

OK : Replace back door closure motor.

NG : Repair or replace harness.