04 Audi A8 key adaptations

[astrofil]

Hello Mates

I have 04 Audi A8 . I was trying to adapt new key to the kessy. I was following Ross Tech manuals. Dont know why but did not program new keys. Now next day the can bus is down and cant even communicate with the car. Pressing the brake pedal and high beam lever is not helping . Can somebody advise how to adapt keys in situation with no existing keys present?

[marrijonas]

Hello, key is original? If not you need to precode and PIN code prepared.

Sent from my P5_Quad using Tapatalk

[astrofil]

I have figured it out. To wake up the Diagnostic BUS I used the the High Beam lever. Main main problem was following incorrect Ross- Tech Manual saying that after saving the adaptation block 21 go back and exit the Kessy Module and than learn the keys. If You do that the key will not adapt.
I have followed the Ross-Tech manual except that I saved the adaptation block 21 and than cycled the key on while still logged to Kessy Unit than removed the key and inserted one more key to learn. All done

[astrofil]

I have figured it out. To wake up the Diagnostic BUS I used the the High Beam lever. Main main problem was following incorrect Ross- Tech Manual saying that after saving the adaptation block 21 go back and exit the Kessy Module and than learn the keys. If You do that the key will not adapt.
I have followed the Ross-Tech manual except that I saved the adaptation block 21 and than cycled the key on while still logged to Kessy Unit than removed the key and inserted one more key to learn. The second new key wont learn. I bought it from somebody who sells legit keys. Im not sure if he has prepared it with pin. What should I use to PIN prepare the Audi key ?