FL e91 SOS call system failure

KevRum · 02-13-2023, 03:17 AM

Hey,

My vin is : WBAUX51020A546444

Problem:
I have active SOS call system failure + AUX volume is stuck at 0 + Bluetooth option wont load.
Requierments:
I would like to disable SOS thing overall and get back AUX and Bluetooth capabilities.
Possible solution?:
I found video from 3 years ago that shoed to delete 612 from VO, is it correct way to do this?
Other way would be to find the sos battery and swap it out?

KevRum · 02-13-2023, 06:28 AM

Quote:

Originally Posted by KevRum

Hey,

My vin is : WBAUX51020A546444

Problem:
I have active SOS call system failure + AUX volume is stuck at 0 + Bluetooth option wont load.
Requierments:
I would like to disable SOS thing overall and get back AUX and Bluetooth capabilities.
Possible solution?:
I found video from 3 years ago that shoed to delete 612 from VO, is it correct way to do this?
Other way would be to find the sos battery and swap it out?

I checked today and i do have 612 in my VO.

KevRum · 02-23-2023, 12:24 AM

So i just went for it, but either i did something wrong or this just didn't work. Cannot see 612 in VO anymore but SOS error is still there and aux Bluetooth don't work. I ordered the LOOP to bypass this telephone module, hope this fixes all my MOST related errors.
Should my aux and Bluetooth capabilities come back also with Loop fix?

ctuna · 02-23-2023, 11:13 AM

You are starting out with messing with software when it's the Hardware you
have to understand first.
Depending on the year of the car and the options Aux and bluetooth can
come from different modules.
In the first years of the e90 only the TCU controlled bluetooth phone and SOS
In 2007 they added the mulf 2 module to handle USB and Aux.
You often get both a TCU and Mulf 2 high in this year and the usb is enabled
with the 6fl option and both the usb and aux come from the mulf 2
In later years these funtions where all taken car of through the combox.

You need to find out which hardware modules you have to cover SOS and aux
bluetooth first.

Don't know if that's the way it works in Europe though .
Stuff can differ between continents.

Running and option list with mdecoder.com would be a good start.
Then looking at which modules you have .

KevRum · 02-27-2023, 12:10 AM

Thanks for the reply, added the list. I believe my car has mulf2 and tcu , I also added the errors i got.

I dont have aux in the middle ( using adapter usbc - aux on my s22 ultra )
Bluetooth just keeps loading, when i press telephone in the middle.

I'm checking the modules when I get my car back from shop.

sam9116 · 03-13-2023, 10:16 PM

It looks like the car couldn't communicate to either units, TCU/ULF. So, both are bad?

KevRum · 03-14-2023, 03:52 AM

Quote:

Originally Posted by sam9116

It looks like the car couldn't communicate to either units, TCU/ULF. So, both are bad?

I'm not sure, not figured out yet. Could it be that the MOST ring is bad somewhere so it cannot see one cos of the other?

sam9116 · 03-16-2023, 05:49 PM

Quote:

Originally Posted by KevRum

I'm not sure, not figured out yet. Could it be that the MOST ring is bad somewhere so it cannot see one cos of the other?

As far as I know MOST bus does not handle communication to the module itself, they transmit audio signals

KevRum · 03-18-2023, 05:14 AM

So I got the MOST loop today, but nothing happened. So I think I need the MULF2 module next then. Do I need to add 612 to VO also then? Anyone knows?

ctuna · 03-19-2023, 03:29 PM

http://www.e90post.com/forums/showthread.php?t=1181654
FYI you don't need a TCU.

At least you don't need a tcu in the US because BMW doesn't support
SOS here do to the discontinuation of 2g

cybercoder · 03-23-2023, 02:12 PM

If you want to connect your phone over Bluetooth you will need either TCU or Mulf high with the BT antenna or Combox (you will be able to stream music as well)

SOS failure can be coded out

Quote:

Originally Posted by KevRum

Hey,

My vin is : WBAUX51020A546444

Problem:
I have active SOS call system failure + AUX volume is stuck at 0 + Bluetooth option wont load.
Requierments:
I would like to disable SOS thing overall and get back AUX and Bluetooth capabilities.
Possible solution?:
I found video from 3 years ago that shoed to delete 612 from VO, is it correct way to do this?
Other way would be to find the sos battery and swap it out?

KevRum · 03-29-2023, 01:19 AM

So finally figured how to code out SOS error. Added LOOP into TCU light cable and unplugged TCU also replaced MULF HIGH, had opportunity to get the same one with same codes etc.

Swapped it, AUX fixed itself but Bluetooth is still stuck in Please Wait, I think i need to reset ULF now with ISTA to get Bluetooth back.

02-13-2023, 03:17 AM	#1
KevRum New Member 2 Rep 24 Posts Drives: E91 320D 2008 Join Date: Feb 2022 Location: Estonia iTrader: (0)	FL e91 SOS call system failure Hey, My vin is : WBAUX51020A546444 Problem: I have active SOS call system failure + AUX volume is stuck at 0 + Bluetooth option wont load. Requierments: I would like to disable SOS thing overall and get back AUX and Bluetooth capabilities. Possible solution?: I found video from 3 years ago that shoed to delete 612 from VO, is it correct way to do this? Other way would be to find the sos battery and swap it out?
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02-23-2023, 12:24 AM	#3
KevRum New Member 2 Rep 24 Posts Drives: E91 320D 2008 Join Date: Feb 2022 Location: Estonia iTrader: (0)	So i just went for it, but either i did something wrong or this just didn't work. Cannot see 612 in VO anymore but SOS error is still there and aux Bluetooth don't work. I ordered the LOOP to bypass this telephone module, hope this fixes all my MOST related errors. Should my aux and Bluetooth capabilities come back also with Loop fix?
	Appreciate 0 Quote

02-23-2023, 11:13 AM	#4
ctuna Lieutenant General 1911 Rep 13,103 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	You are starting out with messing with software when it's the Hardware you have to understand first. Depending on the year of the car and the options Aux and bluetooth can come from different modules. In the first years of the e90 only the TCU controlled bluetooth phone and SOS In 2007 they added the mulf 2 module to handle USB and Aux. You often get both a TCU and Mulf 2 high in this year and the usb is enabled with the 6fl option and both the usb and aux come from the mulf 2 In later years these funtions where all taken car of through the combox. You need to find out which hardware modules you have to cover SOS and aux bluetooth first. Don't know if that's the way it works in Europe though . Stuff can differ between continents. Running and option list with mdecoder.com would be a good start. Then looking at which modules you have .
	Appreciate 1 sam911615.00 Quote

02-27-2023, 12:10 AM	#5
KevRum New Member 2 Rep 24 Posts Drives: E91 320D 2008 Join Date: Feb 2022 Location: Estonia iTrader: (0)	Thanks for the reply, added the list. I believe my car has mulf2 and tcu , I also added the errors i got. I dont have aux in the middle ( using adapter usbc - aux on my s22 ultra ) Bluetooth just keeps loading, when i press telephone in the middle. I'm checking the modules when I get my car back from shop. Attached Images
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03-13-2023, 10:16 PM	#6
sam9116 Private 15 Rep 92 Posts Drives: Join Date: Apr 2017 Location: Edmonton, Alberta, Canada iTrader: (0)	It looks like the car couldn't communicate to either units, TCU/ULF. So, both are bad?
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03-18-2023, 05:14 AM	#9
KevRum New Member 2 Rep 24 Posts Drives: E91 320D 2008 Join Date: Feb 2022 Location: Estonia iTrader: (0)	So I got the MOST loop today, but nothing happened. So I think I need the MULF2 module next then. Do I need to add 612 to VO also then? Anyone knows? Attached Images
	Appreciate 0 Quote

03-19-2023, 03:29 PM	#10
ctuna Lieutenant General 1911 Rep 13,103 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	http://www.e90post.com/forums/showthread.php?t=1181654 FYI you don't need a TCU. At least you don't need a tcu in the US because BMW doesn't support SOS here do to the discontinuation of 2g
	Appreciate 0 Quote

03-29-2023, 01:19 AM	#12
KevRum New Member 2 Rep 24 Posts Drives: E91 320D 2008 Join Date: Feb 2022 Location: Estonia iTrader: (0)	So finally figured how to code out SOS error. Added LOOP into TCU light cable and unplugged TCU also replaced MULF HIGH, had opportunity to get the same one with same codes etc. Swapped it, AUX fixed itself but Bluetooth is still stuck in Please Wait, I think i need to reset ULF now with ISTA to get Bluetooth back.
	Appreciate 0 Quote