Sound Is Not Heard From Subwoofer (Premium System)

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

HARNESS CHECK

Turn ignition switch OFF.
Disconnect audio amplifier connector B158 and subwoofer connector B72.

Check continuity between audio amplifier harness connector terminal and subwoofer harness connector terminal.

TERMINAL CONTINUITY CHART

Terminals				Continuity
Audio unit		Speaker or tweeter
Connector	Terminal	Connector	Terminal
B158	2	B72	1	Yes
	3		3
	18		2
	19		4

Check continuity between audio amplifier harness connector terminal and ground.

Fig 1: Checking Continuity Between Audio Amplifier Harness Connector Terminal And Subwoofer Harness Connector Terminal

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

TERMINAL CONTINUITY CHART

Terminals			Continuity
Audio amplifier		-
Connector	Terminal	-
B158	2	Ground	No
	3
	18
	19

OK or NG

OK: GO TO 2.

NG :

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

SUBWOOFER SIGNAL CHECK

Connect audio amplifier connector and subwoofer connector.
Turn ignition switch to ACC.
Check the signal between audio amplifier harness connector terminals with CONSULT-II or oscilloscope.

TERMINAL CONDITION REFERENCE CHART

Terminals				Condition
(+)		(-)
Connector	Terminal	Connector	Terminal
B158	2	B158	18	Receive audio signal
B158	3	B158	19	Receive audio signal

OK or NG

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

NG: Replace audio amplifier. Refer to "AUDIO AMPLIFIER ".

Fig 2: Checking Signal Between Audio Amplifier Harness Connector Terminals

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