Can you please tell me what is involved? Can it be done just with VCDS and/or VCP and/or ODIS or is it, as you are inferring, much more complicated?
The Radar sensor is "Protected" by two Cryptographic Functions.
1. Component Protection
2. SWAP FeC Codes
Only if those are Enabled correctly, than the Radar is working.
1. is easy, every VW Dealer can do this with Odis online
With Component Protection the Radar will be matched to your Car (to your Speedo)
Every Time the ignition will be turned on, the Radar and the Speedo talk together and check that they match, if so, all ok, if not, you get a "Component Protection Error" in the Radar, and it will not work.
With this matching, the Radar is matched to the VIN of your Car, too.
2. is easy, too, every VW Dealer can do this with Odis online
Problem is VW keeps a list of enabled Functions regarding your VIN "FeC"
For Radar there are five possible FeC's possible.
- only Frontassist
- Frontassist and ACClow (160 km/h) with DSG
- Frontassist and ACChigh (210 km/h) with DSG
- Frontassist and ACClow (160 km/h) with manual Gearbox
- Frontassist and ACChigh (210 km/h) with manual Gearbox
But when your Car did not had this from the Factory, than the FeC Code will not be generated by the VW Servers.
VW started using this mechanism for a lot of stuff.
Even for GRA in newer Cars.
They wont to make money.
For some stuff like Gra you can buy an upgrade @ VW.
But not for ACC in the T6.
So in short, it is a lot more complicated than using VCDS VCp or Odis ....
But one "easy" way is existing.
- Get a used Speedo from a chrashed T6 that had ACC from factory, the same Gearbox as you, and it needs to have the same Radio configuration, too.
In T6 the Radar and the Dicover Meda are using FeC Codes !!!
- Put it into your car and get the Immobiliser configuration matched to your Engine ECU and your Keeys (Speedo manipulation software needed)
- Change the VIN around all ECU's of your car to the Doner T6 VIN (minimum: ABS, Engine ECU, Speedo)
- Go to VW and let them do Step 1 and Step 2 (for Radar and Radio) for the Donor VIN.
- Radar is working now
- Now you can change the VIN back to your original VIN, Radar will keep working
- You need to keep the Donor Speedo in the Car.