Thread: Sos Malfunction
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      12-05-2012, 10:05 AM   #19
marius76
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Drives: 335d
Join Date: Jun 2009
Location: Washington, DC

Posts: 457
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if you buy used or new unit you should program it and code plus transfer your account.
try to take your car to the dealer and ask to perform diagnosis or as afsar wrote buy MOST loop, disconnect fiber optic cable from TCU and connect MOST loop. If audio will work then you have an issue with TCU unit. Also check if there is a power comming to TCU.
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