Close 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.

CLOSE SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While fully opening and closing the back door, check voltage waveform between back door control unit connector B55 terminal 14 and ground using an oscilloscope.
  
  Fig 1: Checking Voltage Waveform Between Back Door Control Unit Connector B55 Terminal 14 & 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: Close switch is OK.
- NG: GO TO 2.
CLOSE SWITCH CIRCUIT INSPECTION
1. Disconnect back door latch and back door control unit.
2. Check continuity between back door latch (close switch) connector D511 terminal 5 and back door control unit connector B55 terminal 14.
  
  Fig 3: Checking Continuity Between Back Door Latch Connector D511 Terminal 5 & Back Door Control Unit Connector B55 Terminal 14
  Courtesy of NISSAN MOTOR CO., U.S.A.
  - 5 (P) -14 (P): Continuity should exist.
OK or NG
- OK: GO TO 3.
- NG: Repair or replace harness.
CLOSE SWITCH GROUND INSPECTION
Check continuity between back door latch (close 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.
- NG: Repair or replace harness.