Bluetooth in 4.6is with TCU - help!
 

Guys

I bought a TCU on ebay (part no. 84106964113)

Anyway, plugged the 54 pin connector in from the boot, i am waiting for a new BT antenna from BMW which I presume has the cream FAKRA on it?

When turning the car on, I see no 'telephone' option on the nav screen. all the fuses are ok, and I have completely removed the old motorola phone and cabling from the armrest.

I am assured the TCU was working, what else can I try?

Thanks in anticipation

Sam

forgot to say, i'm in the UK and car is a 2002 4.6is which had the old motorloa phone in the armrest before.

Thanks

What kind of phone was your original system?...

I just noticed that you are in the UK. This could add a complexity. In the US market, we got fewer phone choices; therefore all of the pre-wiring is the same and compatible with the TCU modules. In European markets, BMW offered more phone systems, and some had different wiring. It gets tricky, because some of these other systems have the same 54-pin plug, but the wiring is not the same-- search the posts on the BIT II system, for example.

it was a motorola thing, not sure what else I can say about it, small, black, flip thing....!

2002 may mean you had the BITII. Check the WDS[/URL]. You will need Java and Adobe's SVG viewer. Search for TCU. If is a good idea to unplug the TCU until you are sure the wiring is correct, or permenant damage may occur.

thanks, but I am not really sure what I am looking for on there!?

OK, so the formatting on this table is lost when I paste it in here, but this is the TCU pinout and wiring colours
15599 1 FS_MIC+ Mic + GE
X15599 3 CMD/DATA GE
X15599 5 DATA+ SW
X15599 6 Data- In GE
X15599 13 SE11 Talk? SW
X15599 15 K Bus K Bus WS/RT/GE
X15599 17 30<39 Fuse F39 10A RT/GE
X15599 18 30<39 Fuse F39 10A RT/GE
X15599 19 FS_MIC- Mic - SW
X15599 21 Mic Sheild
X15599 32 CHARGER RT/GE
X15599 33 TELON Tel On WS
X15599 35 R<7 Power on (?) VI/WS
X15599 36 31E<8 GND BR/SW
X15599 37 TELNF+ Audio Out+ SW/BR
X15599 38 TELNF- Audio Out- SW/WS
X15599 39 Sheild BR/SW
X15599 46 WS
X15599 51 TELM Mute GE
X15599 52 58G LCZ pin 1/Illumination GR/RT
X15599 54 31E<8 GND BR/SW




Where
RT Red
SW Black
GN Green
BR Brown
GE Yellow
WS White
VI Violet
GR Grey
BL Blue


Check you have the key colours in place for PWR, GND, IBUS, MIC, TEL Audio and Mute.

Can you post a picture and part number of the telephone module you removed from the trunk?

will do when I get home from work - i did have a quick look, it is definately a black plastic box, motorloa sticker and other bits and bobs, and a big old fashioned computer style connector.

Think I may just resort to a Parrot kit - might be easier to sort!?

You have the DB25 on the old kit? That's a BITII. Where did you get the DB25 to 54 pin adaptor? Some have made their own. Beleive me, the OEM kit is better than the parrot. Caller ID, phonebook, fading audio, stock mic, ruggedised mechanics. All you have to do is plug it in using the right adaptor.

do you have a uk p/n for this adaptor?

I am just uploading some pictures.

Sam

ok:

This one shows the plug I am plugging into the TCU
http://www.freeimagehosting.net/uploads/7fb450a5bd.jpg

This one shows the VR jumper thinggy?
http://www.freeimagehosting.net/uploads/a7f6a03abe.jpg

This one shows what USED to plug into the black motorla box in the trunk:
http://www.freeimagehosting.net/uploads/f54f33165f.jpg

And this shows another box of bits which I have so far left untouched:
http://www.freeimagehosting.net/uploads/e60388d3f5.jpg

I am still waiting for the BT antenna from BMW.

Thanks in advace if you can help me to make this work!

and number 1 on here is exactly what I took out (black plastic box with Motorola sticker on it!)

RealOEM.com * BMW E46 325i Single parts, SA 632, trunk

You seem to have most of the ingredients of a working install, but I'm curious how this
http://www.freeimagehosting.net/uploads/f54f33165f.jpg
Was plugged into that
http://www.freeimagehosting.net/uploads/7fb450a5bd.jpg
Without an adaptor?

NEvertheless, You need to do this
http://www.audiworld.com/tech/pics/elec133_54pin.jpg
And check say 50% of the wires match up with the list I posted.

they were not plugged together. The 54pin was unplugged under the lining. The round pin thing was plugged into the black motorola box.

I was told the 54 pin connects directly into the TCU - presume this is not right then?

I'm still unsure how to check the wiring with your list - my technical know how is not that great I am afraid :dunno:

ok, 54 pin adaptor is now apart, just uploading the pics....

OK So as I understand it the car has both the DB25 and 54 pin in the harness? That's a new one on me, usually the car has one or the other, and adaptors in beween.

Before sliding back the 54 pin harness as shown in the photo and checking the wiring colours against the list (you can see each pin is numbered and the wire colours are given in the form RT/SW which is a red wire with a Schwarz [black] stripe), try an see how the DB25 and 54pin coexist in the same harness.

Follow the loom and check to see if the wires are split near the wheel arch and available to both connectors or something. It could be that you have two looms and the 54 pin one isn't plugged in behind the dash perhaps, or perhaps both connectors are wired up. You really do have a setup I haven't seen before, and your car must have been built on the changeover point.

Do you have a multimeter? Is an essential tool and available from the market or Wilkinsons for a fiver. Get one tht has the extra set of sockets for measuring current.

http://www.freeimagehosting.net/uploads/14f933b3b5.jpg

http://www.freeimagehosting.net/uploads/a73cf2c68d.jpg

yes I have a meter here - see images above for pin numbers and colours.

I will try to follow the loom back - in the wheel arch is all goes into one which is all taped up - where would it go from here - under the armrest? dash?

thanks for your help!

ok so the pins dont match your chart - should I change them so they do?

in fact, some of the cable colours I have do not match those on your list... getting very confused now!

First of all use your meter to check for 12V on pin 17 or 18. That will tell us if it is plugged in to the power.

Next we need to find the BITII 54 pin pinout and see if you have that one instead.

OK I need to do some work now (pesky job) but look here. Search for U407. There is the various sockets for the BITII 54 pin version. Have a check and compare with your setup. Compare and contrast with Io1157 Telematics control unit. You may want to start cutting and pasting some of those tables (green table looking icon) into excel with notes on what unit they came from, as it may assist you when you come to swapping pins around. It's a lot of pins to remember.

Right, this is what I have in the 54 pin plug with regards to colours:

1 yellow
2 empty
3 yellow
4 empty
5 black
6 yellow
7 empty
8 empty
9 red
10 white red
11 white green
12 empty
13 empty
14 empty
15 white yellow
16 empty
17 red yellow
18 red yellow
19 black
20 empty
21 shield
22 white green
23 empty
24 empty
25 empty
26 empty
27 empty
28 empty
29 green
30 black
31 empty
32 red yellow
33 white green
34 red
35 violet white
36 brown
37 black white
38 vlack brown
39 brown
40 empty
41 empty
42 empty
43 empty
44 empty
45 empty
46 white
47 blue brown
48 blue black
49 empty
50 empty
51 white brown
52 grey red
53 empty
54 brown

will try and get the meter on it now.

thanks

i can find three versions of U407 - but it doesnt give the cable colours? And none of them sound like they will match what I have at the moment.

I cant find anything on I01157?

Sorry

OK, 17 and 18 both at 0v when power is on - that will be the problem then!

Where do these looms run? I can follow it to the back seat, then it disappears under the floor....?

This is the adapter part number you need.

84.12-0 308 375 DB25 to 54-pin ULF/TCU plug adapter

Forget about that existing 54-pin plug in your car. I have no clue what it was for, but your old phone was connected to the DB25 plug, so that is the plug that is hot and able to support a TCU.

Also, if your phone box was a Motorola, you do not have to worry that you had a BITII system. First, the BITII was made by Siemens. Second, it had the 54-pin plug.

Get the adapter PN above to connect your TCU, and you will be all set.

thanks Brian, I just rang BMW for that part and they say the part number does not exist?

Sorry
Sam

could it be this number 2 on here (not sure which variant!)

RealOEM.com * BMW E53 X5 3.0i Single parts f Cordless lugga. compartm.

DB25 to 54 pin is not available in the UK. You could ask nicely at Cooper BMW parts if they can add it to their system but don't hold out much hope.

It's also close to £60.

You could make one if you are any good at soldering.

I have no idea where your particular car goes, but I'm thinking you are looking at a dash-strip down to find and wire in the audio, power, ibus, mute blah blah... I can't believe you have a loom laid but it is not plugged in! Is the fuse in place? The colour codes for the wires is on the page with the shcmatic for the U407. You have a typo in the telematics part number.

Yes there are fuses in and they are testing ok.

Looks like resorting to the Parrot kit afterall then!!

do the pinouts for the DB25 match the 54 pin then? I could buy the bits and make one up - but surely the 54 pinouts from the TCU mean I wont have enough pins on the DB25!?

also where can I find a list of the pinouts from the DB25 to match up with the ones given earlier for the 54 pin?

Sorry, maybe I am wanting too much and should leave it.....

That is weird. It is a valid part number for the US dealers. By "does not exist" could they mean that BMW is out of stock? It is absolutly a valid part. In the US, this sells for $36, or about £23.

Regarding some of the follow-on posts, there is no reason to have to tear anything apart. All that you need is in the DB25 plug. Here is a post with the DB25 to 54-pin pin conversions. You can make the adapter yourself.
Re: ULF to DB25 adapter for E38

thanks Brian.

The BMW chap just said it is an invalid part number - must just be here in the UK.

I may have a go at making my own...

sod it I will go with the parrot kit - this is too much hassle!

Thanks all for your help - much appreciated.

Sam

Remember, you only need PWR, GND, iBus, mic, TELON, Audio out and mute. The eject box can wait. There is a thread around detailing how to make your own adaptor.


If you use the hyperlinks in the WDS, you can find the connectors where the 54 pin loom plugs in, and photographs of the locations.

Thanks, but as I said, I am not as technically minded as you guys, and I just dont have the time or patience for it to be honest.

The Parrot kit is supposedly plug and play (which I thought the TCU would be to be honest) so I will try that.

any idea where I may get a 54 pin connector in a shop / off the shelf? Looking in Maplins, they have the DB25 but cant find a 54 pin plug....

Before you buy a Parrot, read through this post below. The Parrot is a very good product, but it is no where near as good as the BMW Bluetooth system. Plus, it is not as plug-and-play as they imply. You will have to do a lot more work to route the wiring and mic where you need it. The only thing you need to do for the TCU is to buy that adapter cable. Maybe your dealer can help-- ask them to search their US parts database.

http://www.xoutpost.com/207393-post2.html

thanks again Brian - I have rang BMW again, and they are still saying the part is non existant in the UK, and cant find it even in America. They are not very helpful over here.

I was thinking, as the 54 pin i have is a) dead, b) redundant.

Could I not chop the thing off, and solder a 25w D plug on the end of the appropriate cables in the order given in that link? If I did need to put it back, I could just re-crimp?

If so, I could have a go at this tonight as a last ditch attempt!!

Sam

You can also buy the 54-pin plug and wires from an Audi dealer. Here are their part numbers:
54 Pin connector £1.47 ($3) Audi Dealer - Audi p/n 4e0-972-144.
Pins for connector £0.97 ($0.5) ea (x10 = £9.70 ($5.00)) Audi Dealer - Audi p/n 000-979-010.

Your 54-pin plug is truly a mystery to me. It was hanging loose before you began this, so you could theorize that it is not needed. So "harvesting" that plug for your conversion is viable. However, I have history of bad things when I deleted something I did not recognize. Therefore, I would reserve the chopping of the 54-pin plug as a last-ditch solution.

See my other post for sources of the 54-pin plug parts. I would buy those, and then just splice them into your existing DB 25 plug. That way, you have it wired in parallel, and you do not need to worry about finding the male DB25 plug. I would not cut the old plug out of the car, though, because you never know, you might actually need that some day.

cheers Brian.

Have now spoken to Audi - plug is available in 3-5 days, however the cables are not, and they are on backorder with Audi and could be 4 weeks!

Get the pins from BMW then. The part number is 61.13-0 006 663.

You can get the pins from farnell for much cheaper (pence each). They are about £1.20 each at BMW. I will get the part nunber when I get home. To check US BMW part numbers google for "get BMW Parts"

ok, made up the adaptor as per Brian's link. Plugged it in, nothing.

Double checked everything, plugged it in, nothing.

Disconnected battery, left for an hour, reconnected, nothing. All I have now is a load of lights on the cluster - Exclamation mark, DSC warning etc. :-(

Have now removed the TCU, adaptor etc, lights still on.

I would see if you can get a local dealer to order that adapter part for you.

As far as the cluster warning lights, that is very strange. I can not think of anything in the telephone wiring that could cause that. It seems like your battery is low or something.