Check Closure Motor

WARNING: This page is about a different car, the 2008 Infiniti FX45 and 2008 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK BACK DOOR CLOSURE MOTOR

Turn ignition switch OFF.

Check the signal between back door closure control unit connector and ground with oscilloscope.

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

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

BACK DOOR CLOSURE MOTOR

Connector	Terminals (Wire color)		Back door condition	Signal (Reference value)
Connector	(+)	(-)	Back door condition	Signal (Reference value)
D106	2 (PU)	Ground	Fully closed → fully open	Courtesy of NISSAN MOTOR CO., U.S.A.
D106	3 (G)	Ground	Fully open → fully closed	Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 2.

NG: Replace back door closure control unit.

CHECK HARNESS CONTINUITY
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.