Diagnostic Procedure

STEP	INSPECTION		ACTION
1	Is there broken sound or poor sound quality from all speakers?	Yes	Go to the next step.
1		No	Go to Step 5.
2	Inspect the sound while adjusting the sound volume. Is there broken sound or poor sound quality between "30" and "40"?	Yes	Go to the next step.
2		No	The system is normal.
3	Inspect the BASS/TREB. Is there poor sound quality at "-3 - +3" of "BASS/TREB"? NOTE: The speaker from which the sound is not emitted is specified using by that the speaker voice changes.	Yes	Go to the next step.
3		No	If there is broken sound at "-6 - +6" of BASS/TREB with the maximum volume, the system is normal.
4	Attempt to duplicate the symptom on the other vehicle. Is the sound better than the customer's vehicle?	Yes	Replace the audio unit. (See AUDIO UNIT REMOVAL/INSTALLATION .)
4		No	The system is normal.
5	Identify the speaker with broken sound by adjusting BAL/FADE. Is the speaker installed properly?	Yes	Go to the next step.
5		No	Install the speaker properly.
6	Remove the speaker. Is there any foreign material or damage on the speaker?	Yes	Repair or replace the suspect speaker.
6		No	Go to the next step.
7	Inspect the sound again. Is there broken sound?	Yes	Go to the next step.
7	Inspect the sound again. Is there broken sound?	No	Inspect the vibration from the door trim and/or package trim. Repair or replace the suspect trim as necessary.
8	Replace with the speaker known to be good. (e.g., swap right and left speakers) Does the broken sound appear at the same location?	Yes	Replace the audio unit. (See AUDIO UNIT REMOVAL/INSTALLATION .)
8		No	Replace the speaker. (See FRONT DOOR SPEAKER REMOVAL/INSTALLATION .) (See REAR SPEAKER REMOVAL/INSTALLATION .) (See TWEETER REMOVAL/INSTALLATION .)