Half-Latch Switch 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.

HALF-LATCH SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While fully opening and closing the sliding door, check voltage waveform between back door control unit connector B55 terminal 22 and ground using an oscilloscope.
  
  Fig 1: Checking Voltage Waveform Between Back Door Control Unit Connector B55 Terminal 22 & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Voltage Waveform Graph Description Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: Half-latch switch is OK.
- NG: GO TO 2.
HALF-LATCH SWITCH CIRCUIT INSPECTION
1. Disconnect back door latch switch and back control unit.
2. Check continuity between back door latch (half-latch switch) connector D511 terminal 6 and back control unit connector B55 terminal 22.
  
  Fig 3: Checking Continuity Between Back Door Latch (Half-Latch Switch) Connector D511 Terminal 6 & Back Control Unit Connector B55 Terminal 22
  Courtesy of NISSAN MOTOR CO., U.S.A.
  - 6 (BR) - 22 (BR): Continuity should exist.
OK or NG
- OK: GO TO 3.
- NG: Repair or replace harness.
HALF-LATCH SWITCH GROUND INSPECTION
Check continuity between back door latch (half-latch switch) connector D511 terminal 3 and ground.

Fig 4: Checking Continuity Between Back Door Latch Connector D511 Terminal 3 & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
- 3 (B) - Ground: Continuity should exist.
OK or NG
- OK: Replace the back door latch. Refer to "BACK DOOR LOCK ".
- NG: Repair or replace harness.