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  #1  
Old 05-19-2007, 07:35 AM
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Combined Bluetooth / Assist Retrofit Problem

Hi,

A month a go I retrofitted NAV to my X5. Everything is working fine and the Monitor/DVD drive/CD Changer all came from the one car, a 2006 4.8is. I also received the combined Bluetooth/Assist module.

Today I fitted the TCU. My car is 04/2004 build. I connected the TCU to the 54 pin connector and the bluetooth aerial to the TCU (beige connector). I did not make any connection to the two remaining plugs on the TCU. One is for the eject box aerial I believe and one is the aerial for the the Assist part to make calls.

When I reconnected the battery the NAV unit correctly gave me the TELEPHONE option. When I move the ignition to pos 1 or 2 I get 'searching' as per the pairing procedure but the unit will not pair with my phone (Nokia 6310i) or my wife's Motorola RAZR.

I notice that none of the lights illuminate on the NAV unit whilst attempting to pair.

Note that I DID NOT install an eject box. Could this be the problem? Is it essential? I though it only provided power and aerial to the phone if in the cradle - and a paring buttom which I thought was superlous on the combined Bluetooth / Assist setup.

One member reported having to ground pin 46 of the 54 pin connector to get his unit to pair (simulating the pairing button). Should I get the eject box to complete the install? If i go down this route which one would I need - the 2004 version (84-21-6-933-415) or the 2005 (84-21-6-946-063) which both have pairing buttons anyway!

Please help!

Luke
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  #2  
Old 05-20-2007, 03:34 AM
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Further Update...

I still cannot pair however I connectedt the aerial to the TCU. I was playing around with the Emergency function and accidently called '000' (911 in the USA). This worked and all the lights came on the NAV unit etc.!

So, the issue appears to be pairing related. I wonder if I need the eject box fitted to enable pairing????

Luke
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  #3  
Old 05-20-2007, 02:48 PM
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The BT/Assist TCU modules normally need to be coded .... even just to get the BT part of the module to work. The BT only ULF modules dont.
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  #4  
Old 05-21-2007, 05:32 AM
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Did you install the 18 connector to the centre console? if you did you can force the BT unit into pair mode,

Do the following.

Get a small peice of wire and strip n twist both ends,
Put keys in ignition (do not turn on yet)
Connect pin7 (pair) to either GND or pin 17 (gnd) in the 18pin connector.
Put ignition to stage 1 and hold the wire loop for 5 seconds then disconnect (pull wire out of pin 7).

This should put the unit into pair mode; pair the phone, wait for the beep, then turn off ingition (to force a phone pair save), the phone is now paired and available.

You might want to check that pin17 is GND (as depending what eject box the lead was for, changes the pin latout).

If you don't have the 18pin eject box connector, then go to the 54pin connector (TCU/ULF end) and open it up and use pin32 to pair the phone (you will need two people 1 to ground pin32 and 1 to turn on the ignition)

However, I think apw2607 is right, TCU modules have to be recoded to the car (at the dealer). You might want to swap the TCU for a BT ULF.

P.S I think the emergency feature will always work for the TCU, regardless of any phone pairing.
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  #5  
Old 05-21-2007, 06:33 AM
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Thanks for the tip!

How do I confirm that Pin 7 is for pairing? I have read some forums that say Pin 1 (I think this is for the ULF module not TCU/BT) and some that say Pin 11, some say Pin 16?? I tried the online WDS but it doen't cover my model!

Can you confirm Pin 7 for me?
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  #6  
Old 05-21-2007, 07:10 AM
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I can only confirm that for me, it was pin7

I retro-fitted the BT over the weekend (I made my own loom) and pin32 on the 54pin plug goes to pin 7 in the 18pin plug in the centre console.

But that was for the ULF BT.

I don't want to give you advice that may damage your setup, so the only thing I can advise is to get the colour code off pin32 (in the 54pin connector) and trace it back to the console.
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  #7  
Old 05-25-2007, 06:06 AM
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It Works!

Hi,

I received the eject box today - took about 10 minutes to fit. It is the 063 eject box which is the one that is specifically for option SA633 - combined assist and blutooth. Phone paired no problem! FYI the screen says "Phone Pairing..." when trying to pair. Yes I had to use the pairing button which mean BMW is not telling it correctly when they say you do not need to use the pairing button with the combined Assist/BT module.

No dealer coding was required for me.

I checked the pinouts on this different part number eject box. FYI Pin 16 is the pairing pin! The pairing button does not light up (unfortunately)!

Thanks for everyone's advice!

P.S. The system is still not working 100% - no one can hear me! I checked my Microphone and there is not one there! For some reason I thought mine was fitted! The cable was right there though!
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  #8  
Old 05-29-2007, 11:07 AM
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Glad you have it sorted well done.
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