Sound Is Not Heard From Center Speaker (BOSE System)

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

HARNESS CHECK

Disconnect BOSE speaker amp. connector M112 and center speaker connector M110.

Check continuity between BOSE speaker amp. harness connector terminal M112 center speaker harness connector terminal M110.

CONTINUITY SPECIFICATION

Terminals				Continuity
BOSE speaker amp.		Center speaker
Connector	Terminal (Wire color)	Connector	Terminal (Wire color)
M112	2 (O/B)	M110	- (O/B)	Yes
	18 (O)		+ (O)

Check continuity between BOSE speaker amp. harness connector M112 terminal and ground.

CONTINUITY SPECIFICATION

Terminals			Continuity
BOSE speaker amp.		-
Connector	Terminal (Wire color)
M112	2 (O/B)	Ground	No
	18 (O)

Fig 1: Checking Continuity Between Terminals

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

OK or NG

OK: GO TO 2.
NG:
- Check connector housings for disconnected or loose terminals.
- Repair harness or connector.

CENTER SPEAKER SIGNAL CHECK
1. Connect BOSE speaker amp. connector M112 and center speaker connector M110.
2. Turn ignition switch to ACC.
3. Push "POWER" switch.
4. Check the signal BOSE speaker amp. harness connector M112 terminal with CONSULT-II or oscilloscope.
  
  Fig 2: Voltage Signal Graph
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Checking Voltages Between Connectors
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Replace center speaker. Refer to Removal and Installation of Center Speaker .
2. NG: Replace BOSE speaker amp. Refer to "REMOVAL AND INSTALLATION OF BOSE SPEAKER AMP. "