SOS malfunction- FIXED

Murf · 03-08-2016, 03:54 PM

So I have the dreaded SOS malfunction error and have lost all sound in my car (chimes, radio, backup) as well as Bluetooth functionality. The Logic 7 radio and nav work fine and it shows bluetooth as active but turned off. From reading the forums it seems this is a common TCU failure.

I purchased a used and known working TCU off of ebay (same firmware, one month newer than mine) and installed it but I am still getting the SOS malfunction error and no sound. I know the TCU will need to be coded to my cars VIN but I kind of expected the error to go away with the replacement unit. What am I missing here, when you replace the TCU do I have to code the new box to make the error go away?

Note to mods - I have cross posted this in the Coding and AV forums..

UPDATE - It was the Satellite module, I purchased a most diagnostics jumper from the dealer and when i jumped out the sat system everything came back. I don't even use sat so no loss for me, I just used electrical tape to hold the jumper in place permanently, no codes that i can see although sat is now grayed out at the head unit. One other thing to note, the jumper does not fit the 335i as is, it needs to be cut apart and the center piece is all thats used. I initially flipped out that I just drove 1.5 hours round trip to pick it up and it didn't fit at first.

To those that have SOS malfunctions, it's not aways the TCU although the error does point to that. Avoid the dealer, buy yourself a jumper and go through each component to figure out which one is causing the problems.

Joe@TopGearSolutions · 03-08-2016, 09:40 PM

We can code out this error for you.

pak1s0ul · 03-19-2016, 12:03 AM

hello im assuming many of us have come across this error message: SOS malfunction.
so here is the story i have a 2011 e93 m3. everything was working fine until i started coding my car using ncs expert using DCAN cable. i was able to code all the ecu's except TCUM, and 2MULF.
i would get this error:no response from ecu or not connected.
so i thought that i need to update the unit using winkfp using DCAN cable. so my car wasnt connected to external power when i tried the update battery got low and it interrupted the update car battery got low. ever since i got SOS malfunction. tried it again using external power by jumping car to my friends car, went half way got error: security permission denied.

ncs expert gives me this error now:
coapi-2041: WRONG ECU CODING INDEL a_e65R: CODIERINDEX = FFH
TCU15MOS.C16: CODIERINDEX = 16

long story short now my telephone bluetooth is greyed out, and voice commands not working(MIC).

someone told me i need ICOM MOST connection to code TCUM.

i have a feeling i need most connection to revive the ecu.
but then i dont understand how did it trigger sos malfunction if tcum,2mulf only works with MOST connection. btw winkfp shows ecu status 0C. and when i retrieve UIF using inpa it shows status Okay.
any input would be appreciated thanks.

03-08-2016, 03:54 PM	#1
Murf Captain 885 Rep 897 Posts Drives: 2021 G80 M3C - Dravit Grey Join Date: Apr 2011 Location: Florida iTrader: (2)	SOS malfunction- FIXED So I have the dreaded SOS malfunction error and have lost all sound in my car (chimes, radio, backup) as well as Bluetooth functionality. The Logic 7 radio and nav work fine and it shows bluetooth as active but turned off. From reading the forums it seems this is a common TCU failure. I purchased a used and known working TCU off of ebay (same firmware, one month newer than mine) and installed it but I am still getting the SOS malfunction error and no sound. I know the TCU will need to be coded to my cars VIN but I kind of expected the error to go away with the replacement unit. What am I missing here, when you replace the TCU do I have to code the new box to make the error go away? Note to mods - I have cross posted this in the Coding and AV forums.. UPDATE - It was the Satellite module, I purchased a most diagnostics jumper from the dealer and when i jumped out the sat system everything came back. I don't even use sat so no loss for me, I just used electrical tape to hold the jumper in place permanently, no codes that i can see although sat is now grayed out at the head unit. One other thing to note, the jumper does not fit the 335i as is, it needs to be cut apart and the center piece is all thats used. I initially flipped out that I just drove 1.5 hours round trip to pick it up and it didn't fit at first. To those that have SOS malfunctions, it's not aways the TCU although the error does point to that. Avoid the dealer, buy yourself a jumper and go through each component to figure out which one is causing the problems. Last edited by Murf; 03-09-2016 at 12:05 PM..
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03-08-2016, 09:40 PM	#2
Joe@TopGearSolutions Major 263 Rep 1,173 Posts Drives: BMW Join Date: Mar 2011 Location: USA iTrader: (3)	We can code out this error for you.
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03-19-2016, 12:03 AM	#3
pak1s0ul Enlisted Member 6 Rep 42 Posts Drives: 2011 BMW M3 E93 Join Date: Feb 2015 Location: Brooklyn iTrader: (0)	hello im assuming many of us have come across this error message: SOS malfunction. so here is the story i have a 2011 e93 m3. everything was working fine until i started coding my car using ncs expert using DCAN cable. i was able to code all the ecu's except TCUM, and 2MULF. i would get this error:no response from ecu or not connected. so i thought that i need to update the unit using winkfp using DCAN cable. so my car wasnt connected to external power when i tried the update battery got low and it interrupted the update car battery got low. ever since i got SOS malfunction. tried it again using external power by jumping car to my friends car, went half way got error: security permission denied. ncs expert gives me this error now: coapi-2041: WRONG ECU CODING INDEL a_e65R: CODIERINDEX = FFH TCU15MOS.C16: CODIERINDEX = 16 long story short now my telephone bluetooth is greyed out, and voice commands not working(MIC). someone told me i need ICOM MOST connection to code TCUM. i have a feeling i need most connection to revive the ecu. but then i dont understand how did it trigger sos malfunction if tcum,2mulf only works with MOST connection. btw winkfp shows ecu status 0C. and when i retrieve UIF using inpa it shows status Okay. any input would be appreciated thanks.
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