Loader Vcds — Vii Plus

: The loader may check your cable's firmware. If it indicates an update is needed, follow the prompts within the loader to sync the hardware with the current VCDS version.

This refers to the of the head unit.

This is the nightmare scenario. The Loader might glitch during a long coding session (e.g., updating an immobilizer or flashing a control module). If the loader crashes halfway through: vii plus loader vcds