Cell Phone - Poor Voice Quality On Land Line End
SI B 84 08 09Communication Systems
May 2009
Technical Service
SUBJECT
Telephone: Poor Voice Quality at Landside End
MODEL
E60, E61 (5 Series)
E63, E64 (6 Series)
E82, E88 (1 Series)
E90, E91, E92, E93 (3 Series)
F01, F02 (7 Series)
Vehicles produced from 2/28/07 to 2/27/09 equipped with ZPP (Premium Package) or SA 639 (BMW Assist)
SITUATION
The person on the landline hears an echo and reverberation when the customer makes a hands-free call from the vehicle. The voice quality on the landline is generally poor (low volume or interference). This situation affects all phones except the Apple iPhone 3G. Refer to SI B84 04 09 for information about the Apple iPhone 3G.
CAUSE
A very sensitive audio algorithm in the TCU (Telematics Control Unit) has caused a signal overload.
The interaction with other audio components results in the situation described above.
PROCEDURE
Perform diagnosis using ISTA, and work through any test modules for any related faults.
Program the vehicle with the latest version of ISTA/P. The problem was corrected with the release of ISTA/P 2.33.0. For information on programming and coding with ISTA/P, refer to CenterNet Aftersales Portal Service-Workshop Technology Vehicle Programming.
CAUSE
A very sensitive audio algorithm in the TCU (Telematics Control Unit) has caused a signal overload.
The interaction with other audio components results in the situation described above.
PROCEDURE
Perform diagnosis using ISTA, and work through any test modules for any related faults.
Program the vehicle with the latest version of ISTA/P. The problem was corrected with the release of ISTA/P 2.33.0. For information on programming and coding with ISTA/P, refer to CenterNet - Aftersales Portal - Service-Workshop Technology Vehicle Programming.
WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty.
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