OEM Bluetooth

Audi

Hello everyone,

First of all sorry for posting a thread in English. I hope I won't offend anyone from you. I have a question listed below and could really use some help.

I own Audi A3 8P '06 US model, V6 quattro. It came with Symphony II HU, bose and factory OEM bluetooh. However, bluetooth does not work as it should be.
I can pair my phone (nokia, tried iphone as well) successfully, DIS displays numbers, BT on etc.

Main problem:
When there is an incoming call DIS displays that there is one, music stops. Once I answer it with a button on the steering wheel caller can hear me perfectly but there is no sound from the speakers in the car. There is no sound from the speakers when there is an incoming call, nor there is a notification honk once I pair my phone to bluetooth (read that some have it, others don't).

Presumingly there is something wrong with the wiring that I had not interfered with (except I connected aux-in via SAT button). I attached a couple of photos how the wiring looks like from the back of my HU.
What worries me is that there are two extra wires which are not connected to anywhere (Green and Black).

Photo 1

Photo 2

Photo 3

Photo 4

By searching through the forums I only found a information how to change Symphony II HU to RNS-E which did not provide any information on how the wiring for OEM bluetooth should look like, maybe those two extra wires are the key to this (?).
There is an empty connector slot (4 photo, top slot) which according to a wiring scheme should have tel + tel- nad mute connected. But there is nothing connected and mute, and line-out (caller hears me) works perfectly so it must be something else.

If anyone had something similar or knows what could be the problem I could really use some help.

Any information and help is much appreciated and sorry again for non German thread..

15 Antworten

English is not the problem but rather the question! 😁

There is definitely something wrong with those two wires...they seem to be unplugged from somewhere on the back. I don't have the Symphony in my A3 so the only thing I can show you is the wiring scheme *klick*. But I think you already have this one, right?

Did you try some combinations with the two free wires? I don't think that anything could go wrong by trying to connect them to some of the free slots for testing the functions.

Maybe someone here with the same Symphony model can help you better!

Sorry for my English as well! 😉

Hey there,

Thank you for your reply.

I was looking through the schemes eralier (I think there is one on the radio unit itself) but I haven't tried to connect them. Since the bluetooth and radio units are factory built it should be like a standard wiring, I thought that someone who has bluetooth could identify what those two wires are for (what color and how many wires). Maybe you know what wiring comes from the bluetooth unit?

According to the scheme, two wires should be connected to Connector D 3 and 4 spots for TEL + and TEL -
I tried looking for the bluetooth block underneath the seats but I did not see it. Is it hidden under the carpet or behind the central console? I thought it would be possible to identify the wires (I found this conversion char for the connector to the bluetooth unit).

Thank you for the help!

Bild_1

Bluetooth is under the carpet and very complicated to reach.
The extra isolated green and black wire is micro +/- from the Bluetooth unit, the not extra isolated green and black wire is NF +/-.
Your Symphony is missing the connector D (your Photo 4) where this Pins are normally plugged in.

Hi Bluefield,

Do you think those two wire are actually the cause of this? If so, which pins do I connect the Green and the Black wire to in the connectro D?
Sorry for asking but what is NF +/-?

thank you.

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Zitat:

Original geschrieben von Karx


Hi Bluefield,

Do you think those two wire are actually the cause of this? If so, which pins do I connect the Green and the Black wire to in the connectro D?
Sorry for asking but what is NF +/-?

thank you.

NF is the low frequency for the telephone.

On your pictures the cutted green and black wires are extra shield, they are the micro +/- from the Bluetooth unit under the drivers seat.

black - minus

green - plus

I've looked for a plan how to connect a Symphony II, but it seems more difficult I have thought first.
On different sites are different pins for NF and sometimes 4 pins for NF, but nothing for the micro.
If I found something useful, I'm writing again.

sorry.

i found this Thread in another forum:
http://audiforum.us/.../

a guy seems to be in similar situation. it suits the description you gave: Black is minus (pin 4) Green is plus (pin 3) according to the diagram for the HU. It also mentioned that mute comes through CAN so TEL NF+/- are the only ones required here, which in my case are missing.

I think I will give it a go, but if you find something - please let me know. Thanks again!

My RNS-E has an other Connection as the Symphony II.

RNS-E - Quadlock
Symphony II - ISO
Symphony II+ (from your US Thread) - Quadlock

You need the grey wire for mute (Quadlock Pin 11 D) and the 2 wires for the CAN Bus!
And the extra isolated green and black wire for the mikro and the unisolated black and green for NF +/- (Low Frequency) plus one ground wire (Brown) and one + (30) wire from the Bluetooth unit.

If you have a loading port for your Handy, there are two bundles of cables more.

The Symphony II has 2 ports for the bluetooth unit: D and C1/2/3

The RNS-E has also 2 ports for the bluetooth unit, but it's Quadlock, not ISO like yours.

whew, that's a lot of information 🙂

Black and Green wires don't seem to have an extra shield or something similar that you have in mind. It's just plastic housing and a wire inside.

I understand that the connecotrs are different on Symphony II+ and RNS-e than the ones on the symphony II. But I believe that the wiring which is comming from the Bluetooth unit should be the same. Since this has been factory built and works apart the thing that there is no noise from the speakers i think that other wires are connected properly/in place (mute works, microphone works, just no sound through the speakers).

do you have a diagram or maybe you could provide one with the wiring which has to be done for each connector? http://www.flother-online.de/.../Belegung_Concert.jpg

There is not a single example on the internet on how to connect, or how the wiring should look like on Symphony II 🙁

I know, it's hard to find.
I have the original wire here in front of me and yes, it's the same for every Radio or navi.
Without the 2 bundles of wire for the Handy loading Station, there are only 9 wires:

grey - mute
green and black extra isolated - micro out
green and black - NF +/-
orange/blue - CAN high
orange/Brown - CAN low
red/White - power
brown - ground

I can't explain myself, how it works without these 2 wires from your photo in your car.
The missing 10-pin jacket (D) on your photo is normally red and you need it for a part of pins from the bluetooth unit. The other pins belongs into jacket C1, 2 or 3.
I will search for the right connexion

Thank you for a quick update.

So the factory bluetooth TEL-(black) and TEL+(green) are connectoed to pins 3 and 4 in the connector D, is that right?

I've found the occupancy for your jackets but without colours, so you have to look for the connected pins klick
it's from VW, but it should be the same, check this.

Zitat:

Original geschrieben von Karx


Thank you for a quick update.

So the factory bluetooth TEL-(black) and TEL+(green) are connectoed to pins 3 and 4 in the connector D, is that right?

look here

ge -yellow
gn - green

I'm a little bit irritated???

EDIT
another one klick

EDIT2
Radio Generation II is Concert II and Symphony II, the jackets are the same

Hi BluField,

I managed to connect those two wires (Green and Black) to the connector D (pins 3 and 4). It was successful.

Now I can hear incoming information from the Bluetooth module, as well as the speak commands are now available.
Thank you for your time and help!

Cheers!

Thanx for the info, but unusually, that it was possible to hear you without this 2 cables???

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