Check Power Supply And Ground Circuit

WARNING: This page is about a different car, the 2005 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUSES

Fig 1: Units Power Source Fuse Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Refer to WIRING DIAGRAM - AUTO/L .

OK or NG
1. OK: GO TO 2.
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. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check voltage between BCM harness connector and ground.
  
  Fig 2: Checking Voltage Between BCM Harness Connector & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 3.
2. NG: Check harness for open or short between BCM and fuse.
Fig 3: Terminals Voltage Specification Chart
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground.

Fig 4: Checking Continuity Between BCM Harness Connector & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: INSPECTION END
2. NG: Check ground circuit harness.
Fig 5: Terminal Continuity Specification Chart
Courtesy of NISSAN MOTOR CO., U.S.A.