Check 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-out fuses or fusible link.

UNIT AND FUSE NO SPECIFICATION CHART

Unit	Power source	Fuse No.
BCM	Battery	j
	Battery	3
	Ignition switch ON or START position	16
	Ignition switch ACC or ON position	4

Refer to "WIRING DIAGRAM-TURN- ".

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 Distribution ".

CHECK POWER SUPPLY CIRCUIT

Disconnect BCM connector.

Check voltage between BCM harness connector and ground.

TERMINAL VOLTAGE CHART

Terminals			Ignition switch position
(+)		(-)	OFF	ACC	ON
Connector	Terminal (Wire color)
M18	11 (V)	Ground	0V	Battery voltage	Battery voltage
	38 (R)		0V	0V	Battery voltage
M19	42 (Y/G)		Battery voltage	Battery voltage	Battery voltage
	55 (W/B)		Battery voltage	Battery voltage	Battery voltage

OK or NG

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

Fig 1: Checking Voltage Between BCM Harness Connector And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

CHECK GROUND CIRCUIT

Check continuity between BCM harness connector 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 ground circuit harness.

Fig 2: Checking Continuity Between BCM Harness Connector And Ground

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