Inspection For Power Supply And Ground Circuit

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.

CHECK FUSE AND FUSIBLE LINK
Check for blown BCM fuse or fusible link.

Fig 1: BCM Fuse Or Fusible Link Description Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Refer to "WIRING DIAGRAM - CHIME - ".

OK or NG
- OK: GO TO 2.
- NG: If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to "POWER SUPPLY ROUTING CIRCUIT ".
CHECK POWER SUPPLY CIRCUIT
1. Disconnect BCM connectors M18 and M20.
2. Check voltage between BCM harness connector terminals and ground.
  
  Fig 2: BCM Harness Connector Terminals And Ground Voltage Specification Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Checking Voltage Between BCM Harness Connector Terminals And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: GO TO 3.
- NG: Check harness for open between BCM and fuse.
CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between BCM harness connector M20 terminal 67 (B) and ground.
  - Continuity should exist.
OK or NG
- OK: Inspection End.
- NG: Repair harness or connector.
Fig 4: Checking Continuity Between BCM Harness Connector M20 Terminal 67 (B) And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.