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 FUSES OR FUSIBLE LINK
Check for blown BCM fuses or fusible link.

Fig 1: Power Supply And Ground Circuit - Fuses Or Fusible Link Specification Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Refer to "WIRING DIAGRAM - INT/L - ".

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.
2. Check voltage between BCM connector and ground.
  
  Fig 2: BCM Connector And Ground Voltage Specification Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Checking Voltage Between BCM Connector 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 or fusible link.
CHECK GROUND CIRCUIT
Check continuity between BCM and ground.

Fig 4: BCM And Ground Continuity Specification Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 5: Checking Continuity Between BCM And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
- OK: Inspection End.
- NG: Check harness ground circuit.