In Passats the immobilizer is in the CCM behind the glovebox, not in the instrument cluster like in a Golf.
You need to read out the EEPROM in the CCM to decrypt the PIN.
I think that AVDI or FVDI MIGHT be able do this over the OBD2 port, but its possible that you need to read it directly from the CCM EEPROM dump, should be some info online.
Bookmarks