HELP!Convenience unit (ccu) can not be repaired 433ac

terrywindy1

terrywindy1

A2OC Donor
Hi I am having trouble with the ccu on my Dads car which I have had changed to manual rear windows (electric ones are now on my car). The ccu could not be recoded for manual windows, so posted it of to Lau in Germany who imformed me today " i'm sorry but it's not possible you supposed to search for a 433ac unit" can any one help me with locating ccu with this part number 8Z0959433AC

Regards Terry
 
Hi Terry,

What appears to be wrong with your CCCU? And why do you need the AC suffix?

I have a fully working spare as a "just in case" item that I advertised for sale some while ago, but decided to just put it aside in case I had any problems.

My spare is the "Q" version and was fitted to my TDi (with manual rear windows).

I changed it so I could use the new-style key, and needed the "AF" version.

Just for info I think I had my unit up for £120.

Did Lau provide you with a spare to keep the car going? If so, did this fix whatever issues you were having?

Cheers

Jeff
 
The car was working fine before electric windows were removed. Another forum member removed and re-fitted with manual, when we tried to re-code the cccu it would not accept the coding, we then tried the cccu from his car which worked. I then took the car along to an Audi Main Dealer for re-coding. They informed me the cccu was faulty and needed replacing.
I was recommended to send CCCu to Lau for repair.
The reason I am being specific is because Lau said " i'm sorry but it's not possible you supposed to search for a 433ac unit"

Lau did not provide spare unit, as car was not needed for the short term, I need to fix this problem asap so car can be sold.
Cheers Terry
 
Hi Terry,

Well......I shouldn't really help you out at all......as you've managed, with Tom, to get rear electric windows in your car......so my envious side say's....Let Him Suffer".

But....as it's for your dad......

Anyway - Joking aside, do you have the scan results of your dad's car prior to Tom swapping everything over, if Tom scanned it prior to starting work?
If you do, PM me with an email address and I'll take a look.
Did you try and swap the cccu from your car to your dad's car?
What is the suffix of your dad's cccu?
What effect has this had on your dad's car......doors not unlocking, etc I presume.

Do you know what coding Tom was attempting to input, and the current coding?

Be as descriptive as you can when replying....I'm sure we can get it sorted.

Typical response from most dealers I suspect……buy a new part and that will fix the problem.

Worse case scenario I can think of is you'll have to put the windows back in your dad's car and offer the swap to me instead :p

Cheers

Jeff
 
Hi Jeff
I am sitting here with a blank look on my face! I will have to speak to Tom... We only tried cccu from Toms car and it accepted adaption from value 2 to 3.Only problem with my dads car is that the rear doors do not lock.I do not what the suffix was on the unit was

The only communication I have had from Lau is through Paypal saying that he could not fix the problem and refund has been sent, as per quote. I am uncertain at this time if he is returning the CCCU although I have pm'd him through the forum, I have no other way of contacting him other than by post. If I do not hear from him I will write a letter.
 
Hi Terry,

It sounds like my humorous comments aren't cheering you up much......sorry for that.

I'm sure Lau will send your unit back, if you don't get any comms in the next couple of days I'll chase it with a German forum mod.

It might be worth asking Tom if he still has your dad's scan....This will show the cccu full part number and coding.

You obviously don't have access to VCDS, so swapping your cccu over to your dad's car isn't going to help as you can't code it accordingly.

If it helps any, I'm happy to come to an arrangement for my spare cccu, along with your dad's old one when you get it back.

First off, see if Tom can provide the scan results of your dad's car, or at least the part No. and original coding.
I can then code my spare cccu with the same code your dad had.

PM me if you want to come to an arrangement for my spare unit.

Cheers

Jeff
 
Hi Terry, I have three but not with (433AC)...

Mine are (8Z0 959 433 Q) (8Z0 959 433 F) (8Z0 959 433 AF).

Can anyone shed some light on whether these may work for him?

:cool:
 
Sojah,

It really depends on what the car had....Terry doesn't know this. I have a Q also, and know this will work, but it really depends on what frequency his keyfobs work on.

Cheers

Jeff
 
this has come up before with an issue where it would appear that the transponder for the rear doors got confused when rear eFH were brought into the picture (the locking mech is different, as there are then TSGs with EFH, whereas without, there isn't). That explains the lack of lock.

Channel 61 in the KSG should set the rear doors up correctly, though it is possible that it won't work.

I can't find the exact thread (as usual, it's on the German forum; I know who wrote it, I know approximately when and I have google at my disposal and I still can't find it) but this has come up before.

What *exactly* was done? the rear TSGs are all attached to CAN, right?

- Bret
 
Bret,

I love the way your words look on the page......just don't know what all those acronyms mean.:eek:

The gist of this thread is the original poster has 2 cars.
His car – Manual rear windows.
His dad’s car – electric rear windows.
He has performed a swap of the rear windows.
His car now has rear electric windows and they work fine.
His dad’s car now has manual rear windows and the rear doors don’t lock.

Post re-fit it seems his dad’s car’s CCCU wouldn’t re-code for manual rear windows.
The OP had his local dealer take a look and they advised the CCCU was faulty.

Cheers

Jeff
 
right, and the rear doors can't lock because the connections for them to lock simply don't exist. The two-electric-window CCUs are more complex than the four-electric-window ones, as they need the physical connections to lock the doors.

Four-electric-window ones lock the rear doors via CAN; the two-window versions don't.

- Bret
 
I have chatted to Tom quite extensively about his rear electric window mod and i'm pretty sure he has wired Terry's rear door locks to the CCU. Regardless, i'm seeing Tom tonight and we'll put our brains together to try and come up with a solution.

blue skies
Tony
 
I can confirm Tom did put wire to the cccu for the rear door locks ,he then put the cccu from his car in and the rear doors locked
 
Hi folks,

I'm away from home at the moment. I've just read this thread (and my PMs) using Tony's iPad, but replying is laborious. I'll be home on Monday and will explain precisely what the issue is here.

Thanks for your collective patience.

Tom
 
Ok peeps, here goes...

A few weeks back I swapped the rear electric windows from Terry's dad's car into Terry's car. You can see what's involved here: http://www.a2oc.net/forum/showthread.php?20410
The CCCU needs to be adapted such that it knows about the change in handling of the rear door locks.

All went well and Terry's A2 works perfectly with rear electric windows. However, the CCCU in Terry's dad's A2 appeared to be faulty, even though a scan of the unit revealed nothing out of the ordinary. Basically, the problem is that the unit refuses to accept changes to its coding or adaption changes. VCDS tests OK, but when you save the new value, the unit fails to write. So, even though the CCCU performs all its functions flawlessly, it cannot be adapted. As a result, the rear doors don't lock, as the CCCU still thinks it should lock them over CAN, rather than handling the locks itself.
All the wiring and all the locks work perfectly. As a test of my looms, I placed my own CCCU in the car, adapted it correctly, and everythings locked as it should. I then placed the dodgy CCCU in my car and tried adapting it in my car, resulting in the same problem: the CCCU fails to write the new value.

So, I suggested to Terry than he take the car to Audi and get them to do the adaption. If Audi's diagnostic systems couldn't adapt the CCCU, then the fault would be confirmed. I hadn't heard from Terry until this thread appeared, so I can only assume that Audi were unsuccessful and that the CCCU was therefore confirmed as faulty, hence why it was sent to Lau. I don't know why Lau thinks the CCCU's version letter is incorrect for Terry's dad's car. Note that the CCCU does not move between cars as part of the electric window swap.

- - - - - -

Tomorrow morning I'm going to the Fort William area for the best part of a week as part of my job. I'll have no access to the internet. I hope that what I've written will help others to help Terry whilst I'm away.

Terry: Could you please post the version letter of your dad's CCCU here such that other members with spare CCCUs can assess whether their parts are suitable. - EDIT: Having just read the title of this thread, I'm guessing the faulty CCCU is of the AC version.

Cheers,

Tom
 
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