Half-Latch Switch System Inspection

WARNING: This page is about a different car, the 2006 Infiniti QX56. 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 back door, check voltage between back door control unit connector B55 terminal 22 and ground.

TERMINALS VOLTAGE CHART

22 - Ground

Fig 1: Identifying 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 and back door control unit connector.
2. Check continuity between back door latch (half-latch switch) connector D503 terminal 6 and back door control unit connector B55 terminal 22.
  6 - 22 : Continuity should exist.
  
  Fig 2: Identifying Connector D503 Terminal 6 And Back Door Control Unit Connector B55 Terminal 22
  Courtesy of NISSAN MOTOR CO., U.S.A.
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 D503 terminal 8 and ground.

8 - Ground : Continuity should exist.

Fig 3: Identifying Continuity Between Back Door Latch Connector D503 Terminal 8 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
- OK : Replace the back door latch.
- NG : Repair or replace harness.