Audio System - No Audio or Audio at Maximum Volume

Date: October 17, 2005

Order No.: P-B-82.62/391a

Supersedes: P-B-82.62/391 dated Sept. 15, 2004

Group: 82

Revision: Technical Content Updated

SUBJECT:
Model 203.040/061/076/081/261/264/281/740/764
Model 209.365/375/376/465/475/476

With Option Code 805, 810
Model Year 2005
Audio Not Available During System Start-up or At Maximum Volume

If you receive customer reports in the above model vehicles of the audio intermittently not available during system start-up or the sound is at maximum volume, the sound amplifier software must be updated to version 14/05 per the below procedure. The latest software is available as of DAS 09/05 and patch 2005-09-27-0465.

Note:
Connect a battery charger and turn the ignition and all consumers OFF.

Connect DAS and navigate through the following menus: Control units -> Information and communication -> Audio, video, navigation and telematics -> SOUND - Sound System -> Control unit adaptations -> Control module programming -> Determination of new control unit software and subsequent control unit programming -> Follow the steps as guided by DAS to complete the software update

After the update is complete, remove the key from the ignition and allow MOST and CAN to go to sleep by waiting about 5 minutes without pressing any buttons or opening the doors. Use DAS to check the amplifier's software level is 14/05.

As of Amplifier software 24/04 or 20/04, the conditions below are remedied

^ The audio volume is too loud when the head unit is switched ON

^ Interference noise detected after engine start, the complaint may occur in all audio sources, e.g. AM/FM, CD/CD Changer and when this occurs it is no longer possible to reduce or adjust the volume. The system behaves normally after the ignition is cycled allowing MOST/CAN to sleep.

Note:
For MY 05 Model 203 only, the applicable VIN Ranges are: start of Production to 1A-694422

Note:
The following allowable labor operations should be used when submitting a warranty claim for this repair.





In Case of Warranty, use the table.