e93 MOST module locations

Djetaine · 08-06-2019, 09:45 PM

I have a 2008 e93 top HIFI/Individual audio and I'm trying to diagnose a MOST failure but I'm not sure of what all components are in the ring and where they are.

I've got good connection to the amp but I'm not sure exactly where it goes after that.

Visible in my trunk I have the amp, the IBOC tuner, the TCU and another module up behind the driver side rear. I can't actually figure out how to get to those two modules as they sit halfway in the trunk and halfway under the rear seatback. Can't seem to find any dismantle guides for the rear seats so if anyone has an idea how to get these modules that would be helpful as well.

It's something between the amp and the IBOC, maybe the amp, dunno yet. I have a loopback in the mail. The IBOC fiber has no light, the amp does.

ctuna · 08-06-2019, 10:10 PM

Most
http://www.e90post.com/forums/showthread.php?t=727663
http://www.e90post.com/forums/showthread.php?t=347222
https://www.google.com/search?q=BMW+...VCkMqy2aCK09M:
http://www.1addicts.com/forums/showt...php?p=19256760

If you have a mulf or mulf 2 hi they are located under the TCU in some cars. (which is and additional most connection)
In rare instances the fiberoptic have been chewed up by rodents or in some other way compromised. You can shine a flashlight through a fiber to see if the light comes out the other end.

https://www.e90post.com/forums/showt...5#post24455335

Djetaine · 08-06-2019, 10:17 PM

So based on the diagram in that video it looks like its the TCU.
I just went and looked again and I have good fiber on:
Amp
Sat tuner (that's the one i couldnt figure out earlier)
TCU

No light on HD Tuner so it's probably the SAT tuner. I'm assuming that it goes Amp > TCU >Sat > HD> CCC. The video above he doesnt have an HD Tuner I guess.

Also, i figured out how to get to the damned things. I had to completely remove the Ski passthrough and then get to it after laying the backseats down.

ctuna · 08-07-2019, 12:47 AM

https://www.newtis.info/tisv2/a/en/

There is a most hub where all the trunk fiberoptics are routed from
on an E93 its along one of the sides of the chassis.

Other Most bus modules are Mulf , Mulf 2 Hi what you have will depend
on what year the car is and what options it came with.

08-06-2019, 09:45 PM	#1
Djetaine Private 32 Rep 62 Posts Drives: 01 330ci, 08 e93m3 Join Date: Jul 2018 Location: Texas iTrader: (0)	e93 MOST module locations I have a 2008 e93 top HIFI/Individual audio and I'm trying to diagnose a MOST failure but I'm not sure of what all components are in the ring and where they are. I've got good connection to the amp but I'm not sure exactly where it goes after that. Visible in my trunk I have the amp, the IBOC tuner, the TCU and another module up behind the driver side rear. I can't actually figure out how to get to those two modules as they sit halfway in the trunk and halfway under the rear seatback. Can't seem to find any dismantle guides for the rear seats so if anyone has an idea how to get these modules that would be helpful as well. It's something between the amp and the IBOC, maybe the amp, dunno yet. I have a loopback in the mail. The IBOC fiber has no light, the amp does. Last edited by Djetaine; 08-06-2019 at 09:59 PM..
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08-06-2019, 10:10 PM	#2
ctuna Lieutenant General 2054 Rep 13,385 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	Most http://www.e90post.com/forums/showthread.php?t=727663 http://www.e90post.com/forums/showthread.php?t=347222 https://www.google.com/search?q=BMW+...VCkMqy2aCK09M: http://www.1addicts.com/forums/showt...php?p=19256760 If you have a mulf or mulf 2 hi they are located under the TCU in some cars. (which is and additional most connection) In rare instances the fiberoptic have been chewed up by rodents or in some other way compromised. You can shine a flashlight through a fiber to see if the light comes out the other end. https://www.e90post.com/forums/showt...5#post24455335 Last edited by ctuna; 08-06-2019 at 10:19 PM..
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08-06-2019, 10:17 PM	#3
Djetaine Private 32 Rep 62 Posts Drives: 01 330ci, 08 e93m3 Join Date: Jul 2018 Location: Texas iTrader: (0)	So based on the diagram in that video it looks like its the TCU. I just went and looked again and I have good fiber on: Amp Sat tuner (that's the one i couldnt figure out earlier) TCU No light on HD Tuner so it's probably the SAT tuner. I'm assuming that it goes Amp > TCU >Sat > HD> CCC. The video above he doesnt have an HD Tuner I guess. Also, i figured out how to get to the damned things. I had to completely remove the Ski passthrough and then get to it after laying the backseats down. Last edited by Djetaine; 08-06-2019 at 10:27 PM..
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08-07-2019, 12:47 AM	#4
ctuna Lieutenant General 2054 Rep 13,385 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	https://www.newtis.info/tisv2/a/en/ There is a most hub where all the trunk fiberoptics are routed from on an E93 its along one of the sides of the chassis. Other Most bus modules are Mulf , Mulf 2 Hi what you have will depend on what year the car is and what options it came with.
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