Open 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.

OPEN SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While fully closing and opening the back door, check voltage between back door control unit connector B55 terminal 15 and ground.
  
  Fig 1: Back Door Control Unit Terminal 15 And Ground Close And Opening Graph
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Open switch is OK.
2. NG: GO TO 2.
Fig 2: Checking Voltage Between Back Door Control Unit Connector B55 Terminal 15 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
OPEN SWITCH CIRCUIT INSPECTION
1. Disconnect back door latch and back door control unit connector.
2. Check continuity between back door latch (open switch) connector D503 terminal 4 and back door control unit connector B55 terminal 15.
  1. 4 (O/L) -15 (O/L): 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 4 And Back Door Control Unit Connector B55 Terminal 15
Courtesy of NISSAN MOTOR CO., U.S.A.
OPEN SWITCH GROUND INSPECTION
Check continuity between back door latch (open 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.