How to Install VAG-COM 409.1 KKL Cable on Windows
Posted by Alex (Im) E. on 30 January 2013 12:52 AM
vag-com kkl usb cable
VAG-COM 409.1 KKL Car Diagnostics Cable

This article will guide you on how to install the VAG-COM 409.1 KKL USB cable on your Windows system. It will then successfully work with OBD-II software (like Ross-Tech VCDS) and your car.

CAUTION: In our experience, we do not recommend using VAG-COM 409.1. Because whether you bought it from eBay or random website, it's functionality is still very limited. What's more, you'll need to pay extra $97 to upgrade the free VCDS-Lite software to full version. And even if you do upgrade for $97 — you can only scan cars made up to 2004.

For that reason, we recommend you get the full VAG-COM 2014 Kit with original, unlocked and full version of VCDS from Ross-Tech™ — by clicking here.  


STEP 1: Download VAG-COM Drivers

Download the VAG-COM Driver Pack 1 here.


For Windows Vista, 7, 8:

Uncompress the file. Double-click on "Install.exe" to install the drivers. When complete — plug in the cable into any USB port on your computer and wait as it installs automatically.

For Windows XP:

  • Uncompress the file. Double-click on "Install.exe" to install the drivers.
  • Plug the cable into an appropriate USB port.
  • The ‘Found New Hardware Wizard’ will start and it will ask you “Can Windows connect to Windows Update to search for the software?”. Select ‘Yes’.
  • Select “Install the software automatically”.
  • After the installation is complete, click “Finish”.
  • The ‘Found New Hardware Wizard’ will start once again because there are two drivers for this cable.
  • Go through the same steps as explained above to install this second driver.


Drivers failed to install on Windows XP, Vista, 7, 8? Here's a fix...

This simply involves installing another set of drivers. Download the VAG-COM Driver Pack 2 here.

Unextract the file into any folder. Then while your cable is connected to the computer — go Device Manager.

  • Windows Vista/7/8: Control Panel » System » Device Manager
  • Windows XP: Control Panel » System » "Hardware" tab » Device Manager

You'll see a device similar to "USB Serial Port" under either "Other devices" or "Ports (COM & LPT)".

Right-click and choose "Update Driver Software". Like this:

Then select the location where you unextracted Driver Pack 2. Let it install.


STEP 2: Discover What Port Number Your VAGCOM Cable is Using

Go to Control Panel.

  • Windows Vista/7/8: Control Panel » System » Device Manager
  • Windows XP: Control Panel » System » "Hardware" tab » Device Manager


Expand "Other devices" or "Ports (COM & LPT)". Whichever contains "USB Serial Port".

Next to "USB Serial Port" — you'll see a number.


If the COM port number is between 1-4, then everything is fine. And OBD software will successfully detect your cable and you can being scanning your car.

If the COM port number is above 4, then we'll have to change it so it's between 1-4. Let's do that now...

Right-click on "USB Serial Port" and click on "Properties" — as per below pic:



  1. Click: Port Settings

  2. Click: Advanced

  3. For "COM Port Number" — you MUST choose any number between 1-4.

That's it! OBD software will now successfully detect your VAG-COM cable, and you're ready to begin scanning!



Testing the COM Port with the Vag-Com Software

For testing the COM Port with the Vag-Com Software you will need to follow the steps explained below:

  • Plug the cable into your computer’s port and into your vehicles socket.
  • Turn the ignition on.
  • Start the VAG-COM software.
  • Click the “Options” button.
  • You will see “Select COM Port” box; select the “COM Port” number that the device uses as displayed in the Device Manager.
  • Click the ‘Test’ button.
  • If everything is good, it should display “Interface Status: Found!”.


If the test is not successful, you should check the following:

  • Other software or devices using USB ports or that same COM Port could be conflicting. You should uninstall the suspected software or device for troubleshooting this problem.
  • It should be noted that this Vag-Com does not work on vehicles running on the CAN-BUS System.
  • The cable must be plugged into the vehicle with the ignition ON.
  • Test the cable with each COM Port from 1 to 4 in Windows Device Manager.
  • Make sure that the driver is installed and configured as explained in the above instructions.


Troubleshooting Common Issues:

Following are the solutions to the most common problems that you may face.

  • Firstly, you need to make sure that all of the above guidelines for installation of driver files and for configuration of the COM Port where properly followed.
  • Be sure that you are using the item on an Audi, VW, Skoda or Seat vehicle.
  • Service Pack 1 for Windows 2000 does not work reliably with VAG-COM. If you are using Windows 2000 with Service Pack 1, you are advised to apply Service Pack 2 or Service Pack 3.
  • If the device doesn’t connect or if you get the error message “Can't Synch Baud Rate”, go to the Options Screen and try setting the Start Baud to 9600. If 9600 doesn't work, try 4800 and 1200 as well. Turn the vehicle’s ignition OFF and back ON after each failed attempt to connect! Also verify that the controller exists on the vehicle.
  • If you have installed the Vag-Com Software more than once or installed a different version without uninstalling the previous, it could conflict. The best way to resolve this issue is to uninstall all versions of VAG-Com software and then re-installed. It is preferable to uninstall with an uninstall program such as Norton.
  • If all of the above measures fail to solve your problem, as a last resort; remove and uninstall all unnecessary devices and hardware from your PC e.g. modems, printers or other USB devices. You should also uninstall all Vag-Com software. Re-install the Vag-Com software and cable drivers. If any device is conflicting with Vag-Com, this method will highlight such an issue.


For further information and instructions for troubleshooting, visit the following 2 links:


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