2007 sos error no audio please help

Jlcave · 04-22-2017, 07:45 PM

Hello, I just joined the forum to get help with this one issue I have. I have a 2007 335i without i drive and I recently got the sos symbol with a line through it error and now I have no audio at all. I just ordered another TCU and it did not fix the problem so now I am not sure what to do next. My car has the extended 100k mile warranty and of course it covers everything except the radio. I really want to avoid taking it to the dealer (I am a college student so I can't exactly afford for them to rip me off right now). Any help would be appreciated. I am pretty handy so diy fixes are fine as well.

ctuna · 04-22-2017, 08:19 PM

If you have logic 7 it could be the amp.
You can bypass the TCU and or satellite module with
a most jumper and if the the sound comes back that
is the defective module.
A new TCU or Satalite module will probably need coding.

Jlcave · 04-22-2017, 09:36 PM

Quote:

Originally Posted by ctuna

If you have logic 7 it could be the amp.
You can bypass the TCU and or satellite module with
a most jumper and if the the sound comes back that
is the defective module.
A new TCU or Satalite module will probably need coding.

I have the "BMW professional" sounds system. is that the same as the logic 7?

ctuna · 04-22-2017, 10:20 PM

04-22-2017, 07:45 PM	#1
Jlcave Registered 0 Rep 2 Posts Drives: 2007 335i Join Date: Apr 2017 Location: Memphis, TN iTrader: (0)	2007 sos error no audio please help Hello, I just joined the forum to get help with this one issue I have. I have a 2007 335i without i drive and I recently got the sos symbol with a line through it error and now I have no audio at all. I just ordered another TCU and it did not fix the problem so now I am not sure what to do next. My car has the extended 100k mile warranty and of course it covers everything except the radio. I really want to avoid taking it to the dealer (I am a college student so I can't exactly afford for them to rip me off right now). Any help would be appreciated. I am pretty handy so diy fixes are fine as well.
	Appreciate 0 Tweet Quote

04-22-2017, 08:19 PM	#2
ctuna Lieutenant General 2033 Rep 13,348 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	If you have logic 7 it could be the amp. You can bypass the TCU and or satellite module with a most jumper and if the the sound comes back that is the defective module. A new TCU or Satalite module will probably need coding.
	Appreciate 0 Quote

04-22-2017, 10:20 PM	#4
ctuna Lieutenant General 2033 Rep 13,348 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	There are three different sound systems that are common. They have almost nothing to do with the head unit which is the only thing labeled as Professional. Read the second and third links first. BMW stereo types http://www.e90post.com/forums/showthread.php?t=352586 http://www.e90post.com/forums/attach...2&d=1266451970 http://www.e90post.com/forums/attach...2&d=1260829447 http://www.bmwmotorsports.org/pdf/e7...%20Systems.pdf http://www.e90post.com/forums/showthread.php?t=343673 http://www.e90post.com/forums/showthread.php?t=138949 http://www.e90post.com/forums/attach...1&d=1209780605 http://www.e90post.com/forums/attach...1&d=1209780865 http://www.e90post.com/forums/showthread.php?t=641323 http://bmwcoders.com/forum/3-er-8/bm...1-e92-e93-291/ http://technicpnp.com/menuDiagrams/d...e90_92_93.html http://www.musicarnw.com/page-2/ http://www.e90post.com/forums/attach...3&d=1169133185 http://www.bmwmotorsports.org/BMW_docs/mostbus.pdf http://www.e90post.com/forums/attach...4&d=1278871872 I believe the 07 335's came with L7 stock. Most common problem with the amped stereos is the amp gets wet.Leaks from seals and plugged sunroof drains usually cause this. Last edited by ctuna; 04-22-2017 at 10:27 PM..
	Appreciate 0 Quote