Here's a short video I took while diagnosing an ABS issue on a SEAT Altea. It shows how to connect to the HEX-NET in AP mode, and open VCDS Mobile on a SmartPhone. Next, I read and describe the fault codes and view the live data to determine the fault.

After replacing the faulty ABS wheel speed sensor, I re-read the codes and clear them, and then check the live data to make sure everything is OK