SUBWOOFER AMP: Diagnosis Procedure

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUSE

Check for blown fuses.

FUSE SPECIFICATIONS

Unit	Terminals	Signal name	Fuse No.
Subwoofer amp.	9	Ign switch ACC or ON	17

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 subwoofer amp connector.
Check voltage between subwoofer amp harness connector and ground.

CONNECTOR TERMINAL VOLTAGE CHART

(+)		(-)	Voltage (approx.)
Connector	Terminal	(-)	Voltage (approx.)
B21	9	Ground	Battery voltage

Fig 1: Checking Voltage Between Subwoofer Amp Harness Connector Terminal 9 And Ground

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

Is battery voltage present?

YES: GO TO 3.

NO: Check harness between subwoofer amp and fuse.

CHECK GROUND CIRCUIT

Check continuity between subwoofer amp harness connector and ground.

CONNECTOR TERMINAL CONTINUITY CHART

(+)		(-)	Continuity
Connector	Terminal	(-)	Continuity
B21	7	Ground	Yes

Fig 2: Checking Continuity Between Subwoofer Amp Harness Connector Terminal 7 And Ground

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

Does continuity exist?

YES: Inspection End.

NO: Repair harness or connector.