BOSE SPEAKER AMP: Diagnosis Procedure

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM - WITH NAVIGATION SYSTEM ".

CHECK FUSE

Check that the BOSE speaker amp. fuse is not blown.

Unit	Terminal	Signal name	Fuse No.
BOSE speaker amp.	1	Battery power	29

Are the fuses OK?

YES: GO TO 2

NO: Be sure to eliminate cause of malfunction before installing new fuse.

CHECK POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect BOSE speaker amp. connector.

Check voltage between BOSE speaker amp. harness connector B74 terminal 1 and ground.

(+)		(-)	Voltage (approx.)
Connector	Terminal	(-)	Voltage (approx.)
B74	1	Ground	Battery voltage

Fig 1: Checking Voltage Between Bose Speaker Amp. Connector B74 Terminal 1 And Ground

Courtesy of NISSAN NORTH AMERICA, INC.

Is battery voltage present?

YES: GO TO 3

NO: Check harness between BOSE speaker amp. and fuse.

CHECK GROUND CIRCUIT

Turn ignition switch OFF.
Disconnect BOSE speaker amp. connector.

Check continuity between BOSE speaker amp. harness connector B74 terminal 17 and ground.

(+)		(-)	Continuity
Connector	Terminal	(-)	Continuity
B74	17	Ground	Yes

Fig 2: Checking Continuity Between Bose Speaker Amp. Connector B74 Terminal 17 And Ground

Courtesy of NISSAN NORTH AMERICA, INC.

Does continuity exist?

YES: Inspection End.

NO: Repair harness or connector.