Right-click on the VCDS installer (e.g., VCDS-Release-21.3.0-Installer.exe ) and select "Run as administrator" from the context menu. This gives the installer the necessary permissions to write files to protected system folders, such as C:\Ross-Tech\VCDS and the Windows registry, preventing permission-based errors.
Click to flash both the Flash memory and the internal EEPROM space. 4. Best Practices to Prevent Future Failures
Third-party loaders are often blocked by modern security features.
: Windows 11 features like "Memory Integrity" (Core Isolation) or incompatible 64-bit drivers can block the low-level USB communication required by the loader. vcds loader kolimer failed 2
Uninstall VCDS and delete the installation folder completely. Disable your internet connection.
: Ensure your laptop is offline when launching the loader. Many users find that launching VCDS through VCDSloader.exe while online triggers security checks that lead to failure.
The loader requires deep system permissions to hook into the VCDS software package. Right-click on your shortcut. Select Properties and navigate to the Compatibility tab. Right-click on the VCDS installer (e
: The next time the user tries to launch the software through the Kolimer loader, they are met with the dreaded "Failed 2" message. This effectively means the loader can no longer "talk" to the cable because the cable's firmware has been flagged or corrupted by the official software's counter-measures. The Legacy
Different versions of Kolimer exist (e.g., Kolimer 18.9, 19.6, 21.3). The loader is specific to:
: Windows Defender or third-party security suites flags the loader executable as a false positive, deleting or locking its runtime components. Uninstall VCDS and delete the installation folder completely
The Kolimer loader acts as a bridge, allowing aftermarket diagnostic cables to safely communicate with VCDS software without triggering the official software's anti-piracy countermeasures. When it throws a "Failed 2" error, it typically points to one of three issues:
The "Failed 2" error is a catch-all for various underlying problems, but it generally means: "The Kolimer loader attempted to inject its patch into the VCDS process, but the operation was rejected or failed at a critical step."
The Kolimer loader must match the specific firmware version on your cable's chip (e.g., ATmega162 or STM32). If you updated the VCDS software without using the loader, it may have "deactivated" or bricked the cable's license. Clean Reinstall: