Power Supply and Ground Circuit Check for Bluetooth Control Unit

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUSES

Make sure the following fuses for the Bluetooth control unit are not blown.

FUSE REFERENCE

Terminals		Ignition Switch	Fuse No.
Connector	Terminal	Ignition Switch	Fuse No.
B41	1	All positions	3
	2	ACC/ON	6
	3	ON/START	12

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 ROUTING CIRCUIT ".

CHECK POWER SUPPLY CIRCUIT

Disconnect Bluetooth control unit connector B41.

Check voltage between connector terminals and ground as follows.

POWER SUPPLY CIRCUIT

Terminals			Ignition switch position
(+)		(-)	OFF	ACC	ON
Connector	Terminal	(-)	OFF	ACC	ON
B41	1	Ground	Battery voltage	Battery voltage	Battery voltage
	2		0V	Battery voltage	Battery voltage
	3		30V	30V	Battery voltage

Fig 1: Checking Voltage Between Connector Terminals And Ground

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

OK or NG

OK: GO TO 3.

NG: Check harness for open between Bluetooth control unit and fuse.

CHECK GROUND CIRCUITS

Turn ignition switch OFF.

Check continuity between the following Bluetooth control unit terminals and ground.

GROUND CIRCUITS

Terminals			Continuity
Connector	Terminal	-	Continuity
B41	4	Ground	Yes
	21
	23

Fig 2: Checking Continuity Between Bluetooth Control Unit Terminals And Ground

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

OK or NG

OK: Inspection End.

NG: Repair or replace harness.