[VagHelper]

Hi to everyone .... i ask info/support to this comunity because i really finish ideas ... forgive me if I do something wrong already now...


As the title i'm doing retrofit to new A3 8Y 2021 in the tail light .... in particular from halogen to dinamic light. The light are "intelligent" and have LIN databus and some positiv (all from BCM). Here i post my full work for retrofit / diagram and the codig.

THE PROBLEM : codig  .... this car have SFD and i try to move adaptation with SFD lock in 09 , result : i cant move any channel.... SO i take my ODIS-S and unlock SFD for 89min....result : i can move adaptation channel like "ramp"....
good ... i start coding and leutche that are "not used" i can code BUT leutche that are just "used and coded for normal work of the car" i can't code (error 31: coding rejected). i try olso to move with VCP / ODIS-E but nothing . I olso try to load with odis-e full backup of bcm of one 8Y with led front/back and my light start work but of course i have 1000 error and i make SVM to restore my BMC

There is some one that have idea/solution ecc to make a "mix setup" like i wont (like in bcm A3 8V) for finisch this work? .....i'm open to every idea. Thanks

PS2 : megafolder with my guide and diagram

[greenhorn]

you can try to compare... here is full backup... pm for pass after rep+thnx