Cinch Latch Motor System Inspection

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

CINCH LATCH MOTOR SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While fully opening and closing the sliding door, check voltage waveform between sliding door latch control unit connector terminals 3, 9 and ground using an oscilloscope.
  
  Fig 1: Voltage Waveform Graph Description Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Checking Voltage Waveform Between Sliding Door Latch Control Unit Connector Terminals 3, 9 & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: GO TO 2.
- NG: Replace the sliding door latch control unit.
CINCH LATCH MOTOR CIRCUIT INSPECTION
1. Disconnect cinch latch switch and sliding door latch control unit.
2. Check continuity between cinch latch motor connector terminals 1, 2 and sliding door latch control unit connector terminals 3, 9.
  
  Fig 3: Checking Continuity Between Cinch Latch Motor Connector Terminals 1, 2 & Sliding Door Latch Control Unit Connector Terminals 3, 9
  Courtesy of NISSAN MOTOR CO., U.S.A.
  - 1 (G/B) - 3 (G/B): Continuity should exist.
  - 2 (L/B) - 9 (L/B): Continuity should exist.
OK or NG
- OK: GO TO 3.
- NG: Repair or replace harness.
CINCH LATCH MOTOR OPERATION INSPECTION
Connect battery power to terminals 1 and 2 on the cinch latch motor and check motor operation.

Fig 4: Checking Cinch Latch Motor Operation
Courtesy of NISSAN MOTOR CO., U.S.A.
- 1 (+) - 2 (-): It operates.
- 1 (-) - 2 (+): It operates. (Reverse rotation)
OK or NG
- OK: Motor is OK.
- NG: Replace the cinch latch motor.