Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM - WITHOUT INTELLIGENT KEY SYSTEM ".

CINCH LATCH MOTOR SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While fully opening and closing the back door, check voltage between back door control unit connector B55 terminals 11, 12 and ground.
  
  11 - Ground
  12 - Ground Battery voltage
  
  Fig 1: Checking Cinch Latch Motor Signal Voltage
  Courtesy of NISSAN NORTH AMERICA, INC.
  
  Is the inspection result normal?
  
  YES: GO TO 2
  
  NO: Replace the back door control unit.
CINCH LATCH MOTOR CIRCUIT INSPECTION
1. Disconnect back door latch and back door control unit connector.
2. Check continuity between back door control unit connector (A) B55 terminals 11, 12 and back door latch (cinch latch motor) connector D705 (B) terminals 1, 2.
  11 - 2: Continuity should exist.
  
  12 - 1: Continuity should exist.
3. Check continuity between back door control unit connector (A) B55 terminals 11, 12 and ground.
  11 - Ground: Continuity should not exist.
  
  12 - Ground: Continuity should not exist.
  
  Fig 2: Checking Cinch Latch Motor Circuit Continuity
  Courtesy of NISSAN NORTH AMERICA, INC.
  
  Is the inspection result normal?
  
  YES: GO TO 3
  
  NO: Repair the harness between the back door latch (cinch latch motor) and the back door control unit.
CINCH LATCH MOTOR OPERATION INSPECTION
Connect battery power to terminals 1 and 2 on the back door latch connector and check motor operation.

1 (+) - 2 (-): It operates.

1 (-) - 2 (+): It operates. (Reverse rotation)

Fig 3: Checking Cinch Latch Motor Operation
Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES: Motor is OK.

NO: Replace the back door latch.