Check BCM Power Supply and Ground Circuit

CHECK FUSE
- Check 15A fuse [No.1, located in the fuse block (J/B)]
- Check 15A fuse [No.22, located in the fuse block (J/B)]
- Check 50A fusible link (letter M, located in the fuse and fusible link box).
NOTE: Refer to "COMPONENT PARTS AND HARNESS CONNECTOR LOCATION ".

OK or NG

OK : GO TO 2.

NG : If fuse is blown out, be sure to eliminate cause of malfunction before installing new fuse. Refer to "COMPONENT PARTS AND HARNESS CONNECTOR LOCATION ".
CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between BCM connector M3, M4 terminal 38, 42, 55 and ground.
  
  Fig 1: Identifying Voltage Between BCM Connector M3, M4 Terminal 38, 42, 55 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  38 (W/L) - Ground : Battery voltage
  
  42 (L/R) - Ground : Battery voltage
  
  55 (G) - Ground : Battery voltage
OK or NG

OK : GO TO 3.

NG : Check BCM power supply circuit for open or short.
CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check continuity between BCM connector M4 terminal 49, 52 and ground.
  
  Fig 2: Identifying Continuity Between BCM Connector M4 Terminal 49, 52 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  49 (B) - Ground : Continuity should exist.
  
  52 (B) - Ground : Continuity should exist.
OK or NG

OK : Power supply and ground circuit are OK.

NG : Check BCM ground circuit for open or short.