Even with these steps, you might encounter issues. Here are solutions to the most common problems:
chips, use the driver provided on the included mini-CD or download it from a reputable automotive tool site. Manual Installation Connect the cable to a USB port. Device Manager (Right-click Start > Device Manager).
(FTDI or CH340, depending on your cable’s chip):
Run the VCDS-Lite-1.2-Installer.exe you downloaded from Ross-Tech. Follow the on-screen instructions to install the software on your computer.
Windows 10 64-bit blocks drivers that are not digitally signed. Most cheap CH340 drivers are not properly signed. To bypass this:
Many cheap VAG KKL 409.1 cables use counterfeit FTDI chips. Windows 10 may intentionally brick them with error 43. If that happens, you may need to roll back the driver or buy a genuine cable.
The VAG-KKL 409.1 cable is an OBDII-to-Serial adapter utilizing the ISO 9141 and ISO 14230 (KWPs) protocols. It allows users to diagnose Engine, ABS, Airbag, and Transmission systems in older VAG vehicles (roughly 1990 to 2005).
Right-click your cable (e.g., USB-SERIAL CH340 (COM8) ) and select .