I would like to thank you for this post which helped me a lot with CCS assembly and share how I did it.
My car is VW T6 Caravelle 2018 2.0 204KM SGB 7HC CXEB DSG
In my case, I already had a multi-steering wheel but without CCS in the steering wheel and it was also not in the shifters.
I bought a steering wheel from a T6 but with CCS without a limiter.
I also purchased a VCDS program.
If you already have a Multi steering wheel, as in my case, after removing the cushion, check if there are five wires in the left black plug - I had a set so I did not have to buy such a cable.
The next step is to remove the grips (unscrew the torx screw) and disconnect the T41 plug. The plug has such a white handle and you need to pull it upwards - the plug will pop out by itself.
Then you need to get to the BCM, which is under the board between the light knob and the steering wheel from the car's bulkhead.
Exactly with the BCM we need a white T73B plug.
It's easier to unplug the plugs after unplugging the BCM, but I did it without removing it.
The next step is to remove the battery. Under the battery there is a metal plate for four screws, a key 13. Under the plate I had some soundproofing and under it there is a large black box for a few torx 20 screws, if I remember correctly.
After unscrewing these screws you will get to the chamber with a lot of cables and ECU.
The ECU is inserted as if under the lamp and two large black oblong plugs enter it.
The left plug is longer than the right plug.
Next to the ECU on the left there are plugs and sockets of different colors mounted on the grille vertically.
The plugs are the same under the armchairs, you can see what they look like.
We need to unplug all these plugs to get to the black T10 plug / socket at the bottom.
All plugs and sockets have the right colors, so you can easily unplug - connecting them together is not a problem. Two plugs are black, one is probably in the third row, but it doesn't interest us. We are looking for a black socket which is at the bottom and which has a black and yellow wire connected to pin 1. There is no wire in the plug on this pin.
In my assembly, I had to add three wires to the entire installation.
Now I will describe how I made it from which plug and pin to which plug and pin.
Shifters handlebar plug T41:
I had pin 9, the black wire, because there was a Multi steering wheel - if there is no Multi, you need to add + 12V
PIN 11 cable to T10 plug PIN 1 (I used the cable to the engine compartment with a rubber in the bulkhead where the link from the bonnet lock goes)
PIN 10 cable to the T73B PIN 36 plug
(on PIN 10 T41 I already had a green and blue wire which is in T73B PIN 17 - I did not cut it off, I added another wire to it)
(on PIN 36 there is a gray and white wire, I added a new wire to it)
LEGEND:
BCM plug T73B
T41 plug
Black socket next to the T10 ECU
After these maneuvers, I connected all the sockets and plugs in the ECU chamber. I put it all together and mounted the battery without connecting it.
Reassembled the shifters, put on the steering wheel and cushion (put it loosely without screwing it on).
I put the T73B plug together and connected it to the BCM.
After connecting the battery, I only had coding.
CODING:
You do coding at your own risk, it is best to familiarize yourself with the program and its possibilities before doing so. Clicking pointlessly can cause serious problems.
I only had to code items from my list:
ECU 01:
Byte 05 bit 5
BCM 09:
Byte 09 bit 3
Byte 15 bit 0
Byte 17 bit 2 (I turned it on and off, I didn't notice any specific changes - I don't think it adds anything)
Byte 17 bit 7
Byte 29 bit 6
Of course, after this post, each interested person performs such maneuvers at his own risk.
Each car has different equipment and a different installation, which results from the diagrams and the fact that with the BCM I changed the wires several times before everything started and the coding ended without errors.
During the work on BCM and coding by badly connected cables, e.g. power windows, mirrors, etc.
I did everything by trial and error until it started.
Thank you all.