BCM Power Supply and Ground Circuit Check

• Check 15A fuse [No.1, located in fuse block (J/B)]
• Check 15A fuse [No.22, located in 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

1. OK: GO TO 2.
2. NG: If fuse is blown out, be sure to eliminate cause of malfunction before installing new fuse. Refer to SYSTEM WIRING DIAGRAMS (FX35) or SYSTEM WIRING DIAGRAMS (FX45) .

1. Turn ignition switch ON.
2. Check voltage between BCM connector M3, M4 terminal 38, 42, 55 and ground.

   38 (W/L) - Ground: Battery voltage 

   42 (L/R) - Ground: Battery voltage 

   55 (G) - Ground: Battery voltage 

OK or NG

1. OK: GO TO 3.
2. NG: Check BCM power supply circuit for open or short.
   Fig 1: Checking BCM Power Supply Circuit

   Courtesy of NISSAN MOTOR CO., U.S.A.

1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check continuity between BCM connector M4 terminal 49, 52 and ground.

   49 (B) - Ground: Continuity should exist. 

   52 (B) - Ground: Continuity should exist. 

OK or NG

1. OK: Power supply and ground circuit are OK.
2. NG: Check BCM ground circuit for open or short.
   Fig 2: Checking BCM Ground Circuit

   Courtesy of NISSAN MOTOR CO., U.S.A.