Check Power Supply And Ground Circuit

WARNING: This page is about a different car, the 2006 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 fuses or fusible link.

FUSE AND FUSIBLE LINK SPECIFICATION TABLE

Unit	Power source	Fuse and fusible link No.
BCM	Battery	j
	Battery	3
	Ignition switch ON or START position	16
	Ignition switch ACC or ON position	4
IPDM E/R	Battery	34
		36
		38
		40
		41
		45

Refer to "WIRING DIAGRAM - AUTO/L - ".

OK or NG

OK: GO TO 2.

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

CHECK POWER SUPPLY CIRCUIT

Disconnect BCM connectors.

Check voltage between BCM harness connector and ground.

Fig 1: Identifying Voltage Between BCM Harness Connector And Ground

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

BCM VOLTAGE TABLE

BCM		(-)	Ignition switch position
(+)			OFF	ACC	ON
Connector	Terminal		OFF	ACC	ON
M18	11	Ground	0V	Battery voltage	Battery voltage
M18	38		0V	0V	Battery voltage
M19	42		Battery voltage	Battery voltage	Battery voltage
M19	55		Battery voltage	Battery voltage	Battery voltage

OK or NG

OK: GO TO 3.

NG: Check harness for open between BCM and fuse or fusible link.

CHECK GROUND CIRCUIT

Check continuity between BCM harness connector and ground.

Fig 2: Checking Continuity Between BCM Connector Terminal 52 And Ground

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

BCM CONTINUITY TABLE

BCM			Continuity
Connector	Terminal		Continuity
M19	52	Ground	Yes

OK or NG

OK: Inspection End.

NG: Check ground circuit harness.