Inspection For Power Supply And Ground Circuit

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

CHECK FUSE

Check for blown BCM fuses.

FUSE INSPECTION

Unit	Power source	Fuse No.
BCM	Battery	F
BCM	Ignition switch ON or START	1

Refer to , "WIRING DIAGRAM - CHIME - ".

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 SYSTEM WIRING DIAGRAMS . .

CHECK POWER SUPPLY CIRCUIT

Disconnect BCM connector.

Check voltage between BCM harness connector terminals and ground.

CONNECTOR TERMINALS IGNITION SWITCH

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

OK or NG

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

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

CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between BCM harness connector M19 terminals 49 (B) and 52 (B), and ground.
Continuity should exist.

OK or NG
1. OK: INSPECTION END.
2. NG: Repair harness or connector.
  
  Fig 2: Checking Continuity Between BCM Harness Connector M19 Terminals And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.