It should display 'Interface Status: Found!'.If this test is not successful check the following: * The USB option is only available for Ross-Tech made USB Cables. In the 'Select COM Port' box, select the 'COM Port' that the device uses as displayed in the Device Manager. *Turn the ignition on (it will NOT detect the interface if the ignition is off!) Plug the cable into the computer and into your vehicles socket. Testing the COM Port in the Vag-Com Software: Make a note of the COM Port number for setting the Vag-Com software. If you need to change it, double click the device, click the 'Port Settings' tab, click 'Advanced', then change the 'COM Port Number'. Verify that the device 'USB KKL Interface VCP' has its own COM Number that is not in use by another port.

In the Console Tree, double click 'Ports (COM & LPT)' Open the 'Control Panel', click the 'System' icon, in the 'Hardware' tab Click 'Device Manager'. Plug the Vag-Com Cable into an available USB port on your computer.

As I orginally plugged the cable into the hardwired port (post driver install) it only seems to work on this For example I have 1 hardwired USB port on my laptop and a plug-in PC card with 4 USB 2 ports. What I've also found is the cable can be very picky if you try and use it in another physical USB port. What I find generally works best is to disable the COM Port that you wish to use with VAG-Com (anyof the COM ports 1 to 4) and then the cable/drivers will grab that port and use it & there is usually no conflicts. The next bit can be tricky pairing VAG-Com to the Virtual Com port. It should automatically find the drivers for the cable and install them. Install the new drivers using the exe file. It will be called something like 'Windows Driver Package FTDI CDM Driver package' with a date and drvier version appended. Unistall the existing driver using Add/Remove programs in the Control Panel.

If you're using XP & the cable which utilises the FTDI chip drivers then download the latest driver from here: Hacked something up very quickly for you using bits and bobs I've collected from the web.

311.2 Vag Com Usb Driver