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.

HARNESS CHECK

Disconnect audio unit connector M133 (A) and suspect tweeter connector (B).

Check continuity between audio unit harness connector M133 (A) and suspect tweeter harness connector (B).

CONNECTOR TERMINAL CONTINUITY CHART

A		B		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M133	2	M143	1	Yes
	3	M143	2
	11	M144	1
	12	M144	2

Fig 1: Checking Continuity Between Audio Unit Connector M133 And Suspect Tweeter Harness Connector

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

Check continuity between audio unit harness connector M133 (A) and ground.

CONNECTOR TERMINAL CONTINUITY CHART

A		-	Continuity
Connector	Terminal	-	Continuity
M133	2	Ground	No
	3
	11
	12

Are the continuity results as specified?

YES: GO TO 2.

NO:

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

TWEETER SIGNAL CHECK

Connect audio unit connector and tweeter connector.
Turn ignition switch to ACC.
Push POWER switch.
Check the signal between audio unit harness connector terminals with CONSULT-III or oscilloscope.

CONNECTOR TERMINAL SIGNAL CHART

(+)		(-)	Condition	Reference signal
Connector	Terminal	Terminal	Condition	Reference signal
M133	2	3	Receive audio signal	Courtesy of NISSAN MOTOR CO., U.S.A.
M133	11	12	Receive audio signal	Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Checking Signal Between Audio Unit Connector Terminals

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

Is the audio signal voltage as specified?

YES: Replace tweeter. Refer to "REMOVAL AND INSTALLATION ".

NO: Replace audio unit. Refer to "REMOVAL AND INSTALLATION ".