Check BCM Power Supply and Ground Circuit

CHECK FUSE
- 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

OK : GO TO 2.

NG : If fuse is blown out, be sure to eliminate cause of malfunction before installing new fuse. Refer to "POWER SUPPLY ROUTING CIRCUIT ".

CHECK POWER SUPPLY CIRCUIT

Check voltage between BCM connector and ground.

TERMINALS VOLTAGE CHART

Connector	Terminal (Wire color)		Condition of ignition switch	Voltage [V] (Approx.)
Connector	(+)	(-)	Condition of ignition switch	Voltage [V] (Approx.)
M3	38 (W/L)	Ground	ON	Battery voltage
M4	42 (L/R)		OFF
M4	55 (G)		OFF

Fig 1: Identifying Voltage Between BCM Connector And Ground

G04077335

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

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.
  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.

Fig 2: Identifying Continuity Between BCM Connector M4 Terminal 49, 52 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.