Power Supply And Ground Circuit Inspection

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

FUSE INSPECTION
- Check that any of the following fuses in the BCM is blown.
  
  Fig 1: Fuse Condition Inspection Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
NOTE: Refer to "COMPONENT PARTS AND HARNESS CONNECTOR LOCATION ".

OK or NG?
1. OK: GO TO 2.
2. NG: If fuse is blown, be sure to eliminate cause of problem before installing new fuse. POWER DISTRIBUTION .
POWER SUPPLY CIRCUIT INSPECTION (BCM)
1. Turn ignition switch OFF.
2. Disconnect the BCM connector M4, check voltage between connector terminal (refer to the "Chart below") of the harness connector and ground.
  
  Fig 2: Checking Power Supply Circuit (BCM)
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Identifying Voltage Specifications
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG?
1. OK: GO TO 3.
2. NG: Check harness for open and short between BCM and fuse.
GROUND CIRCUIT INSPECTION (BCM)
Check continuity between BCM connector M4 terminals and ground.
1. 56 (B) - Ground: Continuity should exist.
2. 113 (B) - Ground: Continuity should exist.
OK or NG?
1. OK: System is OK.
2. NG: Repair or replace harness.