Half-Latch Switch System Inspection

WARNING: This page is about a different car, the 2005 Infiniti QX56. 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 back door, check voltage between back door control unit connector B55 terminal 22 and ground.
  
  Fig 1: Back Door Control Unit Connector B55 Terminal 22 And Ground Door Ajar Graph
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Half-latch switch is OK.
2. NG: GO TO 2.
Fig 2: Checking Voltage Between Back Door Control Unit Connector B55 Terminal 22 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
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.
  1. 6 (BR) - 22 (BR): Continuity should exist.
OK or NG
1. OK: GO TO 3.
2. NG: Repair or replace harness.
Fig 3: Checking Continuity Between Back Door Latch Connector D503 Terminal 6 And Back Door Control Unit Connector B55 Terminal 22
Courtesy of NISSAN MOTOR CO., U.S.A.
HALF-LATCH SWITCH GROUND INSPECTION
Check continuity between back door latch (half-latch switch) connector D503 terminal 8 and ground.
1. 8 (B) - Ground: Continuity should exist.
OK or NG
1. OK: Replace the back door latch.
2. NG: Repair or replace harness.
Fig 4: Checking Continuity Between Back Door Latch Connector D503 Terminal 8 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.