Audio System - Audio Volume Is Briefly Muted Or Reduced

SI B65 06 08
Audio, Navigation, Monitors, Alarms, SRS

February 2009
Technical Service

This Service Information bulletin supersedes SI B65 06 08 dated October 2008.

[NEW] designates changes to this revision

SUBJECT
RAD2: The Audio Volume Is Briefly Muted or Reduced

MODEL
E90, E91, E92, E93 *(3 Series)

E82, E88 *(1 Series)

*with option 663 (Radio BMW Professional)

Vehicles produced from September 2007 to September 2008

SITUATION
After the vehicle is parked for a couple of hours or overnight (deep sleep mode), the following scenario can occur intermittently, either in AM, FM or CD mode.

Approximately 30 to 90 seconds after the radio begins to play, the audio is either muted or reduced to a low volume for about 1 second. The audio returns to the previous set volume for 2 seconds, and then the audio is once again either muted or reduced to a low volume for 1 second. Thereafter, the radio plays normally with the previously set audio volume.

CAUSE
Software error in the RAD2 (Radio2 from SIEMENS): the issue only affects vehicles without a MOSTbus. The momentary muting occurs during the pre-start check, as the RAD2 attempts a MOST-bus check.

CORRECTION
In the case of a customer complaint, perform diagnosis using BMW diagnostic equipment. Follow any related test plan. Code the vehicle with the most recent Progman version (target data status E89X-08-09-515 or later). Refer to SI B09 05 01 (Coding, Individualization and Programming), Procedure E.

Note that Progman will automatically reprogram all programmable control modules that do not have the latest software.

[NEW] WARRANTY INFORMATION


Covered under the terms of the BMW New Vehicle Limited Warranty.





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