Once flashed, do open the official VCDS shortcut. Instead: Install the VIIPlusLoader (v08.022.xx or newer) .
If the test says "K1: OK, K2: OK, CAN: Questionable," your car might not use the CAN bus, or the high-speed transceiver chip in your clone has failed physically. Conclusion
Connect the cable to your car (12V power is often required for the PC to recognize the interface).
Shows as "Revoked" or "Expired" in the About screen. Prerequisites for Repair Before attempting a repair, ensure you have the following:
Check your 12V power. VCDS cables require the car's OBDII port power to be fully recognized by the software during the "Test" phase.
You need the .bin or .hex firmware specific to version 22.3.1. Step-by-Step Repair Guide (Atmega162 Chips) 1. Disassemble the Interface
Completely remove previous VCDS installations and delete the Ross-Tech folder in C:\ .