NO.5 SOUND BREAK-UP OR POOR SOUND QUALITY [ENTIRE AUDIO SYSTEM]

id0903e2818300

5

Sound break-up or poor sound quality

Possible DTC

Using the M-MDS

U3000:09

Without using M-MDS (On-board diagnostic test mode)

Audio unit (without display)

09:Er21

Audio unit (with display)

Device code 09/error code 21

Car-navigation unit

Device code 09/error code 21
Possible cause
•  Improper speaker installation
•  Vibration of door trim and/or package trim
•  Speaker malfunction (e.g., any foreign material, broken)
•  Audio unit/car-navigation unit malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
•  Is there broken sound or poor sound quality from all speakers?
Yes
Go to the next step.
No
Go to Step 5.
2
•  Inspect the sound while adjusting the sound volume.
•  Is there broken sound or poor sound quality between “15” and “20”?
Yes
Go to the next step.
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.
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
Without Bose®
•  Replace the audio unit.
With Bose®
•  If noise occurs from the speaker of a specific channel, or the volume is minimized and the noise occurs:
―  Replace the audio amplifier.
•  If noise occurs from the speaker of two or more channels or the volume is minimized and the noise does not occurs:
―  Replace the audio unit/car-navigation unit.
No
The system is normal.
5
•  Identify the speaker with broken sound by adjusting BAL/FADE.
•  Is the suspect speaker installed upward?
Yes
Go to the Step 7.
No
Go to the next step.
6
•  Inspect the speaker installation condition.
•  Is the speaker installed properly?
Yes
Go to the next step.
No
Install the speaker properly.
7
•  Remove the speaker.
•  Is there any foreign material or damage on the speaker?
Yes
Repair or replace the suspect speaker.
No
Go to the next step.
8
•  Inspect the sound again.
•  Is there broken sound?
Yes
Go to the next step.
No
Inspect the vibration from the door trim and/or package trim. Repair or replace the suspect trim as necessary.
9
•  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
Without Bose®
•  Replace the audio unit.
With Bose®
•  If noise occurs from the speaker of a specific channel, or the volume is minimized and the noise occurs:
―  Replace the audio amplifier.
•  If noise occurs from the speaker of two or more channels or the volume is minimized and the noise dose not occurs:
―  Replace the audio unit/car-navigation unit.
No
Replace the speaker.
(See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.)
(See FRONT SPEAKER REMOVAL/INSTALLATION.)
(See REAR DOOR SPEAKER REMOVAL/INSTALLATION.)
(See REAR SPEAKER REMOVAL/INSTALLATION.)
(See CENTER SPEAKER REMOVAL/INSTALLATION.)