Sound Is Not Heard From Subwoofer (BOSE System)

WARNING: This page is about a different car, the 2006 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUSE

Check that the following fuse is not blown.

FUSES REFERENCE CHART

Unit	Terminal	Signal name	Fuse No.
Subwoofer	6	Battery power	17

OK or NG

OK: GO TO 2.

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

POWER SUPPLY CIRCUIT CHECK

Disconnect subwoofer connector.
Check voltage between the subwoofer and ground.

CONNECTOR TERMINAL GROUND VOLTAGE SPECIFICATIONS

Unit	Terminal No.			OFF	ACC	ON
	(+)		(-)
	Connector	Terminal	(-)
Subwoofer	B72	6	Ground	Battery voltage	Battery voltage	Battery voltage

OK or NG

OK: GO TO 3.

NG :

Check connector housings for disconnected or loose terminals.
Repair harness or connector.

Fig 1: Checking Voltage Between Subwoofer And Ground

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

GROUND CIRCUIT CHECK
Check continuity between subwoofer harness connector B72 terminal 5 and ground.

Continuity should exist.

OK or NG

OK: GO TO 4.

NG :
- Check connector housings for disconnected or loose terminals.
- Repair harness or connector.
Fig 2: Checking Continuity Between Subwoofer Harness Connector B72 Terminal 5 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

HARNESS CHECK

Disconnect BOSE speaker amp. connectors B74 and B75 and subwoofer connector B72.

Check continuity between BOSE speaker amp. and subwoofer.

CONNECTOR TERMINAL CONTINUITY REFERENCE (1 OF 4)

A		B		Continuity
Connector	Terminal	Connector	Terminal	Continuity
BOSE speaker amp.: B75	22	Subwoofer: B72	4	Yes

CONNECTOR TERMINAL CONTINUITY REFERENCE (2 OF 4)

C		B		Continuity
Connector	Terminal	Connector	Terminal	Continuity
BOSE speaker amp.: B74	3	Subwoofer: B72	1	Yes
BOSE speaker amp.: B74	19	Subwoofer: B72	2	Yes

Check continuity between BOSE speaker amp. and ground.

CONNECTOR TERMINAL GROUND CONTINUITY REFERENCE (3 OF 4)

A		Ground	Continuity
Connector	Terminal
BOSE speaker amp.: B75	22		No

CONNECTOR TERMINAL GROUND CONTINUITY REFERENCE (4 OF 4)

C		Ground	Continuity
Connector	Terminal
BOSE speaker amp.: B74	3		No
	19

OK or NG

OK: GO TO 5.

NG :

Check connector housings for disconnected or loose terminals.
Repair harness or connector.

Fig 3: Checking Continuity Between Bose Speaker Amp. And Ground

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

CHECK SUBWOOFER AMP. ON SIGNAL
1. Operate system and check voltage between subwoofer harness connector B72 terminal 4 and ground.
Voltage: More than approx. 6.5V

OK or NG

OK: GO TO 6.

NG: Replace BOSE speaker amp. Refer to , "BOSE SPEAKER AMP. "

Fig 4: Checking Voltage Between Subwoofer Harness Connector B72 Terminal 4 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

SUBWOOFER SIGNAL CHECK

Connect BOSE speaker amp. connector and subwoofer connector.
Turn ignition switch to ACC.
Check the signal between BOSE speaker amp. terminals with CONSULT-II or oscilloscope.

CONNECTOR TERMINAL SIGNAL REFERENCE

A				Condition
(+)		(-)
Connector	Terminal	Connector	Terminal
BOSE speak er amp.: B74	19	BOSE speak er amp.: B74	3	Receive audio signal

OK or NG

OK: Replace subwoofer. Refer to , "SUBWOOFER (BOSE SYSTEM) "

NG: Replace BOSE speaker amp. Refer to , "BOSE SPEAKER AMP. "

Fig 5: Checking Signal Between Bose Speaker Amp. Terminals With CONSULT-II

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