VCDS 409.1, a legacy version of Ross-Tech’s diagnostic software, wasn’t designed for Windows 7. While VCDS-Lite offers better compatibility with modern operating systems, some users might still need to use VCDS 409.1. This guide provides a detailed walkthrough for installing and configuring VCDS 409.1 on a Windows 7 machine.
Installing USB Drivers
Before installing VCDS 409.1, you need to install the correct USB drivers for your diagnostic interface.
For internet-connected PCs:
Windows 7 can usually automatically download and install the necessary drivers via Windows Update. Simply connect the interface to a USB port and follow the on-screen prompts.
For PCs without internet access:
Download the drivers from another computer and save them to a USB drive. A compatible driver package can be found at: www.gendan.co.uk/download/gendandriver.exe. Run the installer on the offline Windows 7 machine.
Verifying and Adjusting Port Settings
After installing the drivers, identify the assigned COM port:
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Right-click “Computer” on the desktop or Start Menu and select “Properties.”
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Click “Device Manager” in the left pane.
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Expand “Ports (COM & LPT)” to find the “USB Serial Port” representing your interface.
VCDS 409.1 only works with COM ports 1-4. If assigned a higher port:
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Double-click the “USB Serial Port” and go to “Port Settings.”
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Click “Advanced” and choose an available COM port between 1 and 4.
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Click “OK” until you return to the desktop.
Installing VCDS 409.1
Download VCDS 409.1 (“For MODERN SERIAL Interfaces”) from Ross-Tech’s website: www.ross-tech.com/vag-com/download/archives.html.
Crucially, avoid installing within the “Program Files” folder. Windows 7’s security restrictions can prevent the software from functioning correctly. Choose a different directory, for example, C:Ross-TechVAG-COM.
Configuring VCDS 409.1
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Locate the “VAG-COM Release 409-1” shortcut. Right-click and select “Properties.”
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Go to the “Compatibility” tab and check “Run this program as an administrator.”
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Apply the changes and repeat for the Start Menu shortcut if necessary.
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Open VCDS 409.1, go to “Options,” and select the correct COM port.
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Click “Test” then “OK.” Your VCDS 409.1 installation should now be functional. Remember that VCDS 409.1 and KKL interfaces do not support CAN diagnostics. Refer to Ross-Tech’s documentation for compatibility information.
