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BMW 3-Series (E90 E92) Forum
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SOS Malfunction with No Sound / Chimes - Cannot Diagnose
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04-28-2021, 01:00 PM | #23 |
Lieutenant General
2033
Rep 13,348
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The cables don't Fail the Most Bus modules Fail.
As far as cable's failing there have been a couple of cases of Rodents eating into them . Sos failure and no sound are the common symptoms. When one module fails on the Most Bus all the others cease to function because it is a Ring Bus and the failing module breaks the Ring. |
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05-08-2021, 09:30 AM | #24 |
First Lieutenant
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Rep 352
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Drives: M4 Competition
Join Date: Apr 2012
Location: West Palm Beach
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Thank you for the guide. ctuna
Worked perfectly and ended up being the last connector under the driver side panal..it was simply disconnected. It is a short wire and if you take to be scanned it seems it was not plugged back in... Also a note on the amp led color, it is YELLOW and there is a red power indicator to the right of the blinking led, which for most people would be caution but the amp is working just fine as long as it's blinking. I would check the cable under the dash first before dismantling your trunk as the dash wire took 5 mins and removing the amp and panels in the trunk took about 30. |
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audio, chimes, malfunction, most system, no sound, sos |
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