Another SOS light issue

avusblue · 05-02-2013, 12:58 PM

Hey guys I have an '06 330 and I have been dealing with this SOS issue for awhile now, finally this week I have some time to work on the car.

So my radio, chimes, bluetooth don't work. iDrive seemed to operate just fine, it did froze on a few occasion.

What I've tried:
-reset the idrive by holding 3 buttons
-disconnect the battery
-I visually checked the wiring under the trunk mat and the amp wiring, I didn't see any damaged or loose wires/connectors.
-I deleted $639 and +teld in the VO with NCSe

I tried connecting to the TCUM with NCSe and I kept getting error messages. Is my TCUM dead?

Another thing I noticed the car didn't have the original battery, and I did registered the battery with NCS. I wonder if an aftermarket battery can be an issue?

I should also point out that, the radio briefly worked for like 5 minutes when I was driving home from work last month. It scared the crap out of me, since I didn't know the volume was all the way up LOL

What do you guys think I should try next? thanks

Here are the error messages I get from INPA that I think is related to this issue:

SnEeKy4LiFe · 05-02-2013, 06:35 PM

it has to do with your TCU unit.

Dracon · 05-02-2013, 07:07 PM

You say your radio doesn't work now either? Did it stop working before you started playing with NCS Expert?

Sounds like the TCU is dead and causing a break in the MOST loop.

Try getting one of the MOST loopback connectors, unplug you TCU and connect the loopback to the MOST cable. It should let everything come back online.

Then replace the TCU

avusblue · 05-02-2013, 07:56 PM

Quote:

Originally Posted by Dracon

You say your radio doesn't work now either? Did it stop working before you started playing with NCS Expert?

Sounds like the TCU is dead and causing a break in the MOST loop.

Try getting one of the MOST loopback connectors, unplug you TCU and connect the loopback to the MOST cable. It should let everything come back online.

Then replace the TCU

Where is the MOST loopback connectors located at?
thx for the reply

Dracon · 05-02-2013, 08:53 PM

Quote:

Originally Posted by avusblue

Where is the MOST loopback connectors located at?
thx for the reply

You have to buy one from a dealership. I don't have the part number onhand, but I know it's been reference on this site a few times.

avusblue · 05-03-2013, 12:00 AM

ok so I was driving home from work today and the radio works for like 15 seconds, then the sound went out again!

mrgreenwood · 05-13-2013, 09:55 AM

I got the same problem. Still don't have any answer.

05-02-2013, 12:58 PM	#1
avusblue New Member 4 Rep 25 Posts Drives: 2011 BMW M3 Comp Join Date: Aug 2010 Location: USA iTrader: (0)	Another SOS light issue Hey guys I have an '06 330 and I have been dealing with this SOS issue for awhile now, finally this week I have some time to work on the car. So my radio, chimes, bluetooth don't work. iDrive seemed to operate just fine, it did froze on a few occasion. What I've tried: -reset the idrive by holding 3 buttons -disconnect the battery -I visually checked the wiring under the trunk mat and the amp wiring, I didn't see any damaged or loose wires/connectors. -I deleted $639 and +teld in the VO with NCSe I tried connecting to the TCUM with NCSe and I kept getting error messages. Is my TCUM dead? Another thing I noticed the car didn't have the original battery, and I did registered the battery with NCS. I wonder if an aftermarket battery can be an issue? I should also point out that, the radio briefly worked for like 5 minutes when I was driving home from work last month. It scared the crap out of me, since I didn't know the volume was all the way up LOL What do you guys think I should try next? thanks Here are the error messages I get from INPA that I think is related to this issue: Last edited by avusblue; 05-02-2013 at 05:56 PM..
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05-02-2013, 06:35 PM	#2
SnEeKy4LiFe Second Lieutenant 16 Rep 229 Posts Drives: E90 Join Date: Jan 2006 Location: Hawaii iTrader: (4)	it has to do with your TCU unit. __________________ Sneeky4life '06 330i, SG, ZSP, ZPP, Blackline Taillight, 20" Vossen CV3, M3 front and rear..
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05-02-2013, 07:07 PM	#3
Dracon Major 557 Rep 1,244 Posts Drives: 2013 F10 M5 Join Date: Apr 2009 Location: Out and About iTrader: (34) Garage List 2013 BMW M5 [0.00]	You say your radio doesn't work now either? Did it stop working before you started playing with NCS Expert? Sounds like the TCU is dead and causing a break in the MOST loop. Try getting one of the MOST loopback connectors, unplug you TCU and connect the loopback to the MOST cable. It should let everything come back online. Then replace the TCU
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05-03-2013, 12:00 AM	#6
avusblue New Member 4 Rep 25 Posts Drives: 2011 BMW M3 Comp Join Date: Aug 2010 Location: USA iTrader: (0)	ok so I was driving home from work today and the radio works for like 15 seconds, then the sound went out again!
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05-13-2013, 09:55 AM	#7
mrgreenwood Private 7 Rep 58 Posts Drives: 330i Join Date: Jun 2012 Location: Pompano Beach, Florida iTrader: (0)	I got the same problem. Still don't have any answer.
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