Sync3 PAM HEC modul modify , update

[lacbp]

Hello!
I wanted to program a built-in SYNC 3 module afterwards. Read from module, OK. But after writing to module, write "No answer on SEED request..0x13" What is the problem? The same problem with the retrofitted HEC and PAM module!
My car is a focus 3,5 MY16

[zaqik]

it seems as unoriginal ucds