ACTIVE NOISE CONTROL SYSTEM

Note:

Before checking parts for malfunctions, check that the audio system operates normally.
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Tip:

Removing dealer installed options and optional components before performing diagnosis makes it easier to determine the location of a malfunction.

Table 1. Active Noise Control System
Symptom	Suspected Area	Link
Muffled engine sounds in cabin	Proceed to "Power Source Circuit"	Click here
	Proceed to "Input / Output Signal Circuit"	Click here
	Front No. 1 speaker assembly LH	Click here
	Front No. 1 speaker assembly RH	Click here
	Rear No. 3 speaker assembly	Click here
	Harness or connector	-
	Stereo component equalizer assembly	Click here
	Stereo component amplifier assembly	Click here
Abnormal noise from speakers	Front No. 1 speaker assembly LH	Click here
	Front No. 1 speaker assembly RH	Click here
	Rear No. 3 speaker assembly	Click here
	Harness or connector	-
	Stereo component equalizer assembly	Click here
	Stereo component amplifier assembly	Click here

ACTIVE NOISE CONTROL SYSTEM PROBLEM SYMPTOMS TABLE