[4g63turbo]

Hey guys.
I own a 2007 bmw 328i wagon with logic 7 and I-drive.
Last night came home, everything was fine 2 hours after I went out car has no sound. SOS Malfunction came on as well
When you go into entertainment you cant access the Sat radio, and also the menu is kind of blank in that window. When I go into Communication menu It wont pick up my phone.
At this point I checked:
AMPlifier is dry, was replaced 2 months ago.
Checked all the connections, they seem good.
I also check the fiber optic signal(Red light) I don't seem to be getting it at all at Sat module or TCU module. I do get 3 flashes at the amp and then the red light goes off.
At this point it feels like there is a malfunction in the most bus system
Anybody had this happen before?
What else to check for
thanks

[4g63turbo]

bump

[ctuna]

To isolate the problem some use a most jumper
to bypass modules till the sound comes back or some of the
errors go away. If the problem comes from the head unit
this will not work as it the way the most bus communicates
with the rest of the car.
(at least this is the way it looks from the entertainment pdf and
bus diagrams)

[matteblue3er]

Sounds like your SAT module is bad.

You can try removing the SAT module from the MOST loop and rejoining the fiber optic cables.

You can literally just hold the 2 ends of the fiber optic cable together to complete the loop. If sound is restored, you know the SAT module is indeed the culprit.

[4g63turbo]

I Can try that tonight, but I am not getting redlight in the sat module fiber optic connector that goes into sat module.I am guessing its because the loop circuit is broken...

Originally Posted by matteblue3er

Sounds like your SAT module is bad.

You can try removing the SAT module from the MOST loop and rejoining the fiber optic cables.

You can literally just hold the 2 ends of the fiber optic cable together to complete the loop. If sound is restored, you know the SAT module is indeed the culprit.

[matteblue3er]

Do you see the red light at other modules?

TCU/MULF can also be a culprit, as can any other module on the MOST bus.

A cracked com line can also be the issue.

[4g63turbo]

Originally Posted by matteblue3er

Do you see the red light at other modules?

TCU/MULF can also be a culprit, as can any other module on the MOST bus.

A cracked com line can also be the issue.

When I unlock the car and it has to boot up, it will flash at amp 3 times(the fiber optic connector), and then light disappears./. no light or flash anywhere else