[moho]

so here goes:
I have hifi not logic 7 no I drive professional hu, no fuse on amp, Bluetooth with auxiliary in middle cup holder area.
was on a trip and using a DC converter when (unknown if coincidence) my speakers stopped working as well as my 12v fuse blew
I replaced the fuse and 12v works but no audio sound at all.
checked the radio fuses (all 3) all are good.
couldn't find anything burnt or anything.
thought it was my amp, bought a replacement (exact model) plugged it in and still nothing.
then thought the mulf unit went out, bought a optical jumper and jumped the fiber optic to the unit (in trunk under mat in middle), nothing. I had a spare stereo HU (aftermarket) and adapter so I plugged in just the speaker cables from the HU and left my stock HU connected at the same time and still no sound ( not my HU i guess).
the one thing is that there is no light from the fiber cable that goes to the HU, so what else is in the MOST loop? am I missing something somewhere?
also a OBD code report:

heres an error report from my OBD

Fault Report - Carly for BMW - Version: 19.41 FV

ID1: e37d3301-d4df-478f-8ee9-bc501f9da302-869
ID2: 06ae4deb-a194-4449-a3c6-38fba5c33e28-e18-6d2bb24165731e51
INFO: 0A0BC6B5A5A08C76604F3F3724B3
Base: E90
Build-Year: 2006
Faults: 8
ECUs: 14
Filter: just found
Model: 325 i alle/all (MotorID=91, Parameter=84)
Battery: 14.0V
Normal communication
Normal connection
Optimized: 84
B 1
Date: 2016-05-10 18:38:03
OBDII
Version: 23
Device: >samsung< >heroqltetmo< >SM-G930T<
Motor Control:
Engine / Motor
ECU OK, no Fault Code
ABS / DSC / Brake:
Dynamische Stabilitaets Kontrolle / DSC
ECU OK, no Fault Code
Airbag:
Airbag
OC3
Code: 93C3

Transmission Control:
Transmission / Getriebe GS 19
ECU OK, no Fault Code
Instrument cluster:
Instrument cluster / Kombiinstrument
Phone failure
Code: A554

Light/Rain Control:
Heating / AC:
Air conditioning / Klimaanlage
ECU OK, no Fault Code
Immobilizer System:
CAS
ECU OK, no Fault Code
Park distance control:
Cruise Control:
Sunroof / Roof:
Audio/Navi/Communication:
Phone / Telefon
Awakening device has tried three times unsuccessfully to wake up network
Code: D68D

Seats:
Seats / Sitze
ECU OK, no Fault Code
Systems:
Junction Box Passenger / Beifahrer
Bistable relay
Code: A731

Fuel pump / Kraftstoffpumpe
ECU OK, no Fault Code
Car Communication Computer CCC
Message failure
Code: E18D

Message failure
Code: E18F

Ring break diagnosis error
Code: E190

Long and / or frequent Unlocks
Code: E191

Anti-theft alarm system:
Chassis:
Body:
Fussraummodul /FRM
ECU OK, no Fault Code
Dynamic manager / Dynamik-Manager
ECU OK, no Fault Code
Other:

any help will be appreciated.
I dont want to take it to the dealer for $180 just to diagnose it.

[ctuna]

There should be light shinning out of at least
one side of the head unit Most connection.
Additional Most modules if you have them such as satellite
module . What about jumping the most right at the radio .
The speakers should measure 3.2 ohms for the doors and 2 for the
floors at the amp connection.
The radio has a fuse in the rear of the unit as there is both a
radio and amp fuse at the junction box to I believe.

f34 is the amp fuse in early years changing to f8
radio f11 in early years changing to f14

[moho]

f8 is good, I have no f11 or f14 but never did.
there is no light at the HU fiber junction.
I have no satellite or gps.

[moho]

anyone know how to find what most units are in my car?
and/or the order in the loop

[ctuna]

Printout a vin check look at the options is one way

Bluetooth with a TCU or Mulf , compact disk cassete player
and satellite module are all the pomposity's I am aware of.

There is no order but the radio/idrive is the server.

[moho]

Options
1CA Selection Cop Relevant Vehicles Selektion Cop Relevanter Fahrzeuge
205 Automatic Transmission Automatic Getriebe
240 Leather Steering Wheel Lederlenkrad
249 Multi-function For Steering Wheel Multifunktion Fuer Lenkrad
319 Integrated Universal Remote Control Integrierte Universal-fernbedienung
4AB Fine-wood Trim Burr Walnut Edelholzausfuehrung Nussbaum Wurzel
4NA Interior Mirror With Dig. Compass Innenspiegel Mit Digitalem Kompass
403 Glas Roof, Electric Glasdach, Elektrisch
430 Int/ext Rr Vw Mirror W Aut Anti-dazzle Innen-/aussenspiegel Aut.abblendend
431 Interior Rr Vw Mirror W Aut Anti-d Innenspiegel,automatisch Abblendend
441 Smokers Package Raucherpaket
459 Seat Adjustm., Electr. W. Memory Sitzverstellung, Elektr.mit Memory
488 Lumbar Support Driver/front Passenger Lordosenstuetze Fahrer/beifahrer
5GA Prep. Anti-theft Alarm System Alarmanlagenvorbereitung
521 Rain Sensor Regensensor
534 Automatic Air Conditioning Klimaautomatik
544 Cruise Control With Braking Function Geschwindigkeitsregel. Mit Bremsf.
563 Lights Package Lichtpaket
639 Complete Prep. Cellular Phone Usa/cdn Komplettvorb. Handy Usa/cdn
676 Hifi Loudspeaker System Hifi Lautsprechersystem
693 Satellite Tuner Preparation Satellitentuner Vorbereitung
694 Preparation For Cd Changer Cd-wechsler Vorbereitung
8SP Cop Control Cop Steuerung
818 Main Battery Switch Batteriehauptschalter
9AA External Skin Protection Aussenhautschutz
925 Shipping Protection Package

maybe my cellular prep? is that the actual module cause I don't even have a LCD screen for the satellite tuner

[ctuna]

If you don't have a TCU the Most could be turned off
because there would be no need for it. TCU= telephone control
unit replaced but mulf in later years.
Print out your rad file and see it ring status says nicht activ
that would be one explanation for no light coming out of the radio
most connection

If there is a mulf and the most bus is turned on there should be light
coming out of the radio most connector.

Where is says prep it means the wiring is in place but there is no
module.

[Abax335]

An e9x vehilce is very limited for most bus units.

Sdars (satellite), CCC/CIC/RAD 2, M-ULF, AMP, TCU

Don't believe there would be any other options that use the fiber optics.

If you jumped all the control units, checked for power at the headunit (Most gateway) that generates the light its a pretty safe bet that is the issue. From my experience at least. TCU and Headunit are always the first two I check

[moho]

Originally Posted by Abax335

An e9x vehilce is very limited for most bus units.

Sdars (satellite), CCC/CIC/RAD 2, M-ULF, AMP, TCU

Don't believe there would be any other options that use the fiber optics.

If you jumped all the control units, checked for power at the headunit (Most gateway) that generates the light its a pretty safe bet that is the issue. From my experience at least. TCU and Headunit are always the first two I check

I have only jumped the MULF module in the back, as i did not think there are any more control units. My AMP does not have a fiber connection, only cables. Where is the CCC/CIC/RAD 2 unit located so i can jump that? ( i dont have NAV)
Pics of the CD73 Professional Headunit fiber connectors:



I am getting an INPA adapter soon, ill see if i can print my RAD2 files

EDIT: Just found out the RAD2 is my radio when you say jump do you mean to jump it at the actual Headunit(pic2) or the fiber cable(pic1).

[moho]

soooooo I think it's probably my HU
doing this still produces no sound:

[VTECaddict]

If you don't have Logic7, the audio does not go though the MOST bus. Can you read errors off the RAD2 unit?

[moho]

Originally Posted by VTECaddict

If you don't have Logic7, the audio does not go though the MOST bus. Can you read errors off the RAD2 unit?

if i need a INPA cable im going to have to wait a few days to be able to

[Abax335]

jumping the rad 2 will not doing anything since it is the gateway for the vehicle.

PM the last 7 of the vin please

[Abax335]

according to your vin you only have a TCU in the car and the rad 2 on the most bus.

so jumping the MOST would not do anything as they said. The amplifier does get it signals from the rad2.

Check your amp make sure there is no water damage to it. May have to remove it. But it seems like its either the rad2 or amp.

checked fuse 34 ?(amp)
fuse 31 for HU