Closure Motor Check

WARNING: This page is about a different car, the 2005 Infiniti FX45 and 2005 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK BACK DOOR CLOSURE MOTOR
1. Turn ignition switch OFF.
2. Check the signal between back door closure control unit connector and ground with oscilloscope.
  
  Fig 1: Connector Terminal Reference Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Checking Signal Between Back Door Closure Control Unit Connector And Ground With Oscilloscope
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK : GO TO 2.
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.
  1. 2 (PU) - 1 (PU) : Continuity should exist.
  2. 3 (G) - 2 (G) : Continuity should exist.
  Fig 3: Checking Harness Continuity
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check continuity between back door closure control unit connector D106 terminals 2, 3 and ground.
  1. 2 (PU) - Ground : Continuity should not exist.
  2. 3 (G) - Ground : Continuity should not exist.
OK or NG
1. OK : Replace back door closure motor.
2. NG : Repair or replace harness.