Sound Is Not Heard From Subwoofers (BOSE System)

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 FUSE

Check that the following fuse is not blown.

FUSE REFERENCE

Unit	Terminals	Signal name	Fuse No.
Subwoofer RH	6	Battery power	18

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 RH connector.

Check voltage between the subwoofer RH and ground.

POWER SUPPLY CIRCUIT CHECK

Unit	Terminal No.			OFF	ACC	ON
	(+)		(-)
	Connector	Terminal	(-)
Sub-woofer RH	B126	6	Ground	Battery voltage	Battery voltage	Battery voltage

Fig 1: Checking Voltage Between Subwoofer RH And Ground

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

OK or NG

OK: GO TO 3.

NG:

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

GROUND CIRCUIT CHECK
1. Turn ignition switch OFF.
2. Check continuity between subwoofer RH harness connector B126 terminal 5 and ground.
  Continuity should exist.
Fig 2: Checking Continuity Between Subwoofer RH Harness Connector B126 Terminal 5 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 4.

NG:
- Check connector housings for disconnected or loose terminals.
- Repair harness or connector.
CHECK SUBWOOFER AMP. ON SIGNAL
1. Turn ignition switch to ACC.
2. Operate system and check voltage between subwoofer RH harness connector B126 terminal 4 and ground.
  Voltage: Approx. 6.5V
Fig 3: Checking Voltage Between Subwoofer RH Harness Connector B126 Terminal 4 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 5.

NG:
- Check connector housings for disconnected or loose terminals.
- Repair harness or connector.

HARNESS CHECK

Turn ignition switch OFF.
Disconnect BOSE speaker amp. connector and subwoofer connectors.

Check continuity between BOSE speaker amp. harness connector terminal and subwoofer harness connector terminal.

BOSE SPEAKER AMP. HARNESS CONNECTOR TERMINAL AND SUBWOOFER HARNESS CONNECTOR TERMINAL

Terminals				Continuity
BOSE speaker amp.		Subwoofer
Connector	Terminal	Connector	Terminal
B127	2	B26	-	Yes
	2	B126	1
	18	B26	+
	18	B126	2

Check continuity between BOSE speaker amp. harness connector terminal and ground.

Fig 4: Checking Continuity Between Bose Speaker Amp. Connector Terminal And Subwoofer Connector Terminal

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

T BETWEEN BOSE SPEAKER AMP. HARNESS CONNECTOR TERMINAL AND GROUND

Terminals			Continuity
BOSE speaker amp.		-
Connector	Terminal	-
B127	2	Ground	No
B127	18	Ground	No

OK or NG

OK: GO TO 6.

NG:

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

SUBWOOFER SIGNAL CHECK

Connect BOSE speaker amp. connector and subwoofer connector.
Turn ignition switch to ACC.

Check the signal between BOSE speaker amp. harness connector terminals with CONSULT-III or oscilloscope.

SUBWOOFER SIGNAL CHECK

Terminals				Condition	Reference signal
(+)		(-)
Connector	Terminal	Connector	Terminal
B127	18	B127	2	Receive audio signal	Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 5: Checking Subwoofer Signal

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

OK or NG

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

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