Communication/Entertainment Systems - Inoperative
SI B 65 27 08Audio, Navigation, Monitors, Alarms, SRS
February 2009
Technical Service
This Service Information bulletin supersedes SI B65 27 08 dated January 2009.
[NEW] designates changes to this revision
SUBJECT
Entertainment and Communication Systems Are Inoperative
MODEL
E82, E88 *(1 Series)
E90, E91, E92, E93 *(3 Series)
E60, E61 *(5 Series)
E63, E64 *(6 Series)
E70 *(X5)
E71 *(X6)
*with option 6FL (USB Audio Interface)
Vehicles produced since September 2008
SITUATION
The entertainment and communication systems are inoperative.
In addition, the "SOS disabled" warning may be displayed.
CAUSE
The entertainment and communication systems are inoperative because of an open connector or a defective control unit in the MOST-bus.
CORRECTION
Verify the customer complaint.
Perform a short test and diagnosis using the BMW diagnostic equipment. Perform a MOST-bus ringbreak diagnosis. Follow any related test plan.
Jump the control modules on the MOST-bus, starting with the MULF2-High control module.
If jumping the MULF2-High control module restores the MOST-bus operation, replace it.
If jumping the MULF2-High control module does NOT restore the MOST-bus operation, jump the next control unit until the MOST-bus operation is restored.
[NEW] WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty.
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