Check 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

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 - AUTO/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 harness connector and ground.
  
  Fig 2: BCM Harness Connector And Ground Voltage Specification Chart
  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.
Fig 3: Checking Voltage Between BCM Harness Connector And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground.

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

OK or NG
- OK: Inspection End.
- NG: Check ground circuit harness.
Fig 5: Checking Continuity Between BCM Harness Connector And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.