Half-Latch Switch System Inspection

WARNING: This page is about a different car, the 2006 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

HALF-LATCH SWITCH SIGNAL INSPECTION

Turn ignition switch OFF.

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.

TERMINALS VOLTAGE REFERENCE

22 - Ground

Fig 1: Identifying Voltage Waveform Between Back Door Control Unit Connector B55 Terminal 22 And Ground

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 (B) D511 terminal 6 and back door control unit connector (A) B55 terminal 22.
  6 - 22: Continuity should exist.
3. Check continuity between back door latch (half-latch switch) connector (B) D511 terminal 6 and ground.
  6 - Ground: Continuity should not exist.
OK or NG

OK: GO TO 3.

NG: Repair or replace harness.

Fig 2: Identifying Continuity Between Back Door Latch Connector D511 Terminal 6 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
HALF-LATCH SWITCH GROUND INSPECTION
Check continuity between back door latch (half-latch switch) connector D511 terminal 3 and ground.

3 - Ground: Continuity should exist.

OK or NG

OK: Replace the back door latch. Refer to "BACK DOOR LOCK ".

NG: Repair or replace harness.

Fig 3: Identifying Continuity Between Back Door Latch Connector D511 Terminal 3 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.