Anti-theft alarm

timmus said:
Remember that not all CCCUs have full functionality. All UK CCCUs are of the highest spec, but many CCCUs in Ireland and Central Europe don't have the complete range of features that UK owners are all used to. If the CCCU keeps rejecting its coding, that's possibly because it doesn't have the ability to implement the requested change.

Specifically, not all CCCUs have the an integrated alarm system. 2001 A2s were fitted with extremely unrelaible CCCUs - I've changed more of them than I can possibly remember. It is therefore entirely plausible that the CCCU has been changed in the past, but that the person who changed it fitted a CCCU that doesn't have all the required features. This would explain why the alarm doesn't set, why the sounder doesn't beep, why it won't accept the +1024 coding change, etc, etc.

Alternatively, a replacement CCCU with the required functionality has been fitted, but this functionality isn't coded. For instance, the coding to activate the alarm system is a prerequisite of any further alarm-related coding being accepted.
An example: The alarm system is activated using the 4th coding bit (you add or subtract 8 from the code). The beep-on-lock function is activated using the 11th coding bit (you add or subtract 1024 from the code). But you cannot activate bit 11 unless bit 4 is active.

Cheers,

Tom
Click to expand...

Oh.. i see the later date on my CCUU than the car is. So it can be changed.

Maybe you know the functionality of this CCCU?

IMG_0633.JPG
 
So, you have the 'M' version CCCU. Unfortunately, I do not know all the specifications of all the Central European CCCUs (I only know the differences between all the UK CCCUs). However, the 'M' version is from an older generation of CCCU, and it's entirely possible that it does not have the required internal electronics to operate the alarm system, or that it has the alarm system switched off through coding.

Are you able to tell me the coding of this unit? It will be 5 digits, for example 07883.

Cheers,

Tom
 
Controller: 8Z0 959 433 J
Component: Komfortger·t T05 0615
Coding: 06752
Shop #: WSC 00861
 
Vic said:
Coding: 06752
Click to expand...

The CCCU is programmed using 15-bit binary code.

06752 equals 001101001100000 in 15-bit binary code.
This now shows us exactly which features are enabled and which are disabled. Bit 1 is on the extreme right. Bit 15 is on the extreme left.

Bit 4, which enables the alarm system, is currently set to 0 = off. In fact, you can see that only 5 of the 15 features are switched on (1). They are...
Bit 6 = All doors lock when the car exceeds 10km/h.
Bit 7 = Allows you to open/close the electric windows using the remote key.
Bit 10 = Flashes the indicators to confirm all doors are locked.
Bit 12 = USA door logic (don't worry about the exact meaning of this).
Bit 13 = Flashes the indicators when the car is unlocked via the remote key.

So, you can see that absolutely none of the alarm features are enabled. This suggests to me that your CCCU probably doesn't have the necessary hardware for the alarm system ...probably because it has been changed by a previous owner who didn't do their homework.

Please enter coding 07755. Does the CCCU accept or reject this coding?
Also please try entering 06760. Does the CCCU accept or reject this coding?

Cheers,

Tom
 
Already tried code 06760 and it remains the same - 06752.

Will try to enter 07755 tomorow. What it should do?
 
Vic said:
Already tried code 06760 and it remains the same - 06752.

Will try to enter 07755 tomorow. What it should do?
Click to expand...

This is just giving me clues about what hardware is soldered to the CCCU's motherboard. It will help me to help you. :)
 
I've never used VCDS Lite. Is it definitely capable of changing the coding? Could you please try coding with 06720?

Cheers,

Tom
 
Vic said:
Yes, it can change coding.
Click to expand...

OK, thank you.

I think we have conclusive proof that your current CCCU doesn't have an integrated alarm system. All attempts to code anything related to the alarm system are rejected.
If your A2 has the rest of the alarm system hardware, then it has almost certainly had a replacement CCCU ...but whoever did the replacement didn't fully research compatibility.

Cheers,

Tom
 
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spike said:
This link on CCCU features and compatibility may be of interest - http://translate.google.com/translate?sl=auto&tl=en&js=n&prev=_t&hl=en&ie=UTF-8&eotf=1&u=http://www.a2-freun.de/wiki/index.php/Komfortsteuerger%C3%A4t&act=url

Cheers Spike
Click to expand...

That is indeed a great document and one that I have referenced many times. Unfortunately, it doesn't show exactly which features are present in each variant of CCCU. For instance, I know that the AE unit does not have the ability to work in cars with manual real windows, but this is something learnt from my own investigations rather than from a definitive document. Maybe one day I should start collecting one CCCU of each variety and spend an afternoon seeing which coding features are accepted/rejected by each unit!? :)

Cheers,

Tom
 
Thank you for help with this investigation! :)

It seems that timmus is right - alarm is not working because of changed CCCU. Everything leads to it - later date written on CCCU than the car is, can not add codes related to alarm system.

Also found interesting information about CCCU functionality: http://translate.google.com/translate?hl=en&sl=auto&tl=en&u=https://a2-freun.de/forum/forums/topic/22075-komfortsteuergerät/&sandbox=1

Mine is 8Z0 959 433 M, Hardware and software version *****: H15 # / S0006 and in post author's a2 with this CCCU alarm is not installed.

Model year of the A2: 2002
Part number of the installed KSG *: 8Z0 959 433 M
Date of construction of the KSG ***: 05/2002
Was the KSG knowingly exchanged schonmal ?: No.
Equipment of the A2 ex factory ( tick only if installed ):
[] Anti-theft alarm system
[] Electric window lift in all 4 doors
[ x ] radio remote control
-> Radio key frequency **: 433.92 Mhz
Hardware and software version *****: H15 # / S0006
 
Vic said:
Thank you for help with this investigation! :)
Click to expand...

No problem! :)

The next challenge is to find the correct CCCU for your car.

There are two versions of the A2's remote control. Your car is on the earlier version. So, I know that CCCU version Q is suitable for your car (it responds to the earlier version of the remote control and it has all the internal features such as alarm, etc). However, the Q version is not very reliable. The AE and AF versions are very reliable and also have all the CCCU features, but they respond to the later version of the remote controls. So, if you fit an AE or AF CCCU, you will also need to have later version remote controls.

Cheers,

Tom
 
Hello, I'm thinking to install in my A2 the antitheft system. I have a 46 confort unit with code 8Z0 959 433C. Does anyone knows if it can works with antitheft ? Thanks !!!
 
Evening Paolo,

This link should help out to answer you question Sir:

CCCU Wiki

Screenshot 2023-06-26 at 21.34.57.png


Google chrome will be able to translate it to any language for easier reading.

Kind regards,

Tom
 
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