I was working on an audi A5 all keys lost. I tried to read bcm2 with my vvdi key tool plus and soldering free adapter but key tool plus keeps telling me that failed to connect with the adapter. I correctly connected the adapter with DB15 cable. Don’t know why KTP still can’t connect to the adapter.
Check if the adapter is connected to the board properly.
If you look at where the pogos are supposed to go, line them up first before putting the side clips on it will work.
If check all the pin connections and they all good. The adapter is right. Try to update vvdi key tool plus software/firmware to latest version.
We had a customer solve this error by updating the software to V1.8.0 and everything works.
3). If still not working, contact vvdishop.com customer service to reach technical support from xhorse engineer directly.