Open , find the "USB Serial Port" or "Unknown Device," right-click it, and select Update Driver .
Launch the application, click Options , and uncheck "Autodetect." Manually enter the COM port number identified earlier.
is a specialized diagnostic and programming tool for Volkswagen Group vehicles (Audi, VW, Seat, Skoda) typically manufactured before 2007. It is distinct from standard OBD2 scanners because it allows deep-level operations such as odometer correction, security PIN code reading, and immobilizer programming.
In , find your cable under "Ports (COM & LPT)".
Most connection failures ("Open Port Failed") happen because the USB-to-Serial drivers aren't manually assigned. Installing and Registering VCDS Cable or VAG-COM
