Back Door Control Unit Power Supply and Ground Circuit 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.

BACK DOOR CONTROL UNIT POWER SUPPLY CIRCUIT INSPECTION
1. Turn ignition switch OFF.
2. Disconnect back door control unit.
3. Check voltage between back door control unit connector B55 terminal 3 and ground.
  
  Fig 1: Checking Voltage Between Back Door Control Unit Connector B55 Terminal 3 & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  - 3 (Y/R) - Ground: Approx. battery voltage
OK or NG
- OK: GO TO 2.
- NG: Repair or replace harness.
BACK DOOR CONTROL UNIT GROUND CIRCUIT INSPECTION
Check continuity between back door control unit connector B55 terminals 1, 2 and ground.

Fig 2: Checking Continuity Between Back Door Control Unit Connector B55 Terminals 1, 2 & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
- 1 (B) - Ground: Continuity should exist.
- 2 (B) - Ground: Continuity should exist.
OK or NG
- OK: Circuit is OK.
- NG: Repair or replace harness.