Inspection For Power Supply And Ground Circuit

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUSES OR FUSIBLE LINK

Check for blown BCM fuses or fusible link.

UNIT AND FUSE NO SPECIFICATION CHART

Unit	Power source	Fuse or fusible link No.
BCM	Battery	j
	Battery	3
	Ignition switch ON or START position	16

Refer to , WIRING DIAGRAM --- INT/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 AND GROUND .

CHECK POWER SUPPLY CIRCUIT

Disconnect BCM connector.
Check voltage between BCM connector and ground.

TERMINAL VOLTAGE CHART

Terminals			Ignition switch position
(+)		(-)	OFF	ON
Connector	Terminal (Wire color)
M19	42 (Y/G)	Ground	Battery voltage	Battery voltage
	55 (W/B)		Battery voltage	Battery voltage
M18	38 (R)		0 V	Battery voltage

OK or NG

OK: GO TO 3.
NG: Check harness for open between BCM and fuse.

Fig 1: Checking Voltage Between BCM Connector & Ground

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

CHECK GROUND CIRCUIT

Check continuity between BCM and ground.

TERMINAL CONTINUITY CHART

Terminals			Continuity
(+)		(-)
Connector	Terminal (Wire color)
M19	49 (B)	Ground	Yes
	52 (B/W)

OK or NG

OK: INSPECTION END
NG: Check harness ground circuit.

Fig 2: Checking Continuity Between BCM & Ground

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