Diagnostic Software for VW-Audi Group Cars

881 Sumneytown Pike, Lansdale PA 19446, USA

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Current Beta   

Important Note: Beta versions contain new features and functions that have not yet been as fully tested as have Release versions. If you use a Beta, you may find bugs or problems and you are expected to report them to Ross-Tech so that we can fix them before making a new Release.  Please be sure that you have also installed the latest Release on your computer  as well so that you can revert back to using that if you encounter problems with the Beta.  

Beta 904  includes the following new features and improvements:

  • Output Tests for latest Control Modules using UDS/ODX/ASAM protocols.
    These control modules only support Selective Output Tests -- the old-style Sequential tests are a thing of the past.   

    This functionality requires a control module specific "data dictionary" file, so as new modules are introduced, it becomes more important than ever to be sure you are using the latest version (including the latest Data Version).

  • Optional Auto-Refresh for Gateway Installation List. 
    Handy because it can show when a fault code appears in a particular system.

  • Support for new UDS addresses.    
    We believe that VCDS now supports addresses for all UDS control modules in production as of this writing. 

  • Entirely new and revised ODX/ASAM data set.    Now supporting all control module known to be in production cars at the present time.

  • Much improved automatic chassis detection for UDS/ODX/ASAM control modules.  

  • A number of Improvements in the Auto-Scan Function
    Showing even more information from the latest control modules and automatically skipping some "Phantom" modules in the latest cars.

  • Modified SRI Screen to allow presentation of additional Information
    In addition, there is not longer a "default" Job.   The user must actively select a job from the drop-down list.  On many 2008 and newer cars, we found users simply running the default job (which often didn't match the way the car was programmed) and then incorrectly telling us that the SRI function didn't work. 

  • New HEX Firmware Version 1.80
    Allows VCDS more flexibility in selecting which K-Line is used. This will increase compatibly with cars that use Pin 15 for proprietary purposes.    As with the previous version 1.79, HEX interfaces no longer boot in "dumb" mode and are no longer compatible with 3rd party applications unless the "Boot in Intelligent Mode" feature is disabled on the Options screen.

  • New USB Drivers
    Incorporating a number of small compatibility & stability improvements. 

  • Includes all new features first introduced in Beta 812.   Click here to see what those were.

Known Issues:

  • USB Driver Versioning Problem:  The previous USB drivers reported an incorrect version -- much higher than it should have been.    When you install the new drivers, Windows will probably complain that they are older than the ones which are already installed.   You must answer "Yes" when asked if you want to replace the files anyway.   Previous versions of VCDS will also complain that the new drivers are outdated.  This can and should be ignored.

  • Micro-CAN users only: Check the sticker on the Micro-CAN to read the UC number. If the first numerical digit is a number 7, such as UC700000 then you should NOT install the new USB driver included in this Beta. Instead, use the driver that is installed with Release 805, even if Windows complains that the driver is out of date. If your Micro-CAN has a number other than 7 following the UC then the new driver should be fine to install.

Release Notes:

  • Works only with Intelligent Interfaces (HEX, KEY and Micro-CAN).  

  • Works on Windows 98, ME, 2000, XP, Vista and 7.   Windows 95 is not supported.

  • Default installation location is C:\Ross-Tech\VCDS-Beta\. If allowed to install to its default location, it will not overwrite or interfere with the use of Release 805.

  • For controllers using the new UDS/ODX protocol, the following functions are supported:  Control Module ID (including Advanced ID), Coding, Security Access, Fault Codes, Advanced Measuring Values and Output Tests.    Fault Codes and Advanced Measuring Values require a control module-specific "data dictionary" file.    If a data dictionary file is not available for a specific control module, VCDS will show an obvious error message, in which case you should contact Support@Ross-Tech.com.   We are still working on support for other diagnostic functions, but no timetable is available yet.

  • The Copyright Notice, Disclaimer, and Instructions posted on our main download page apply to this version as well.


  • VCDS Beta 904 is no longer available for download.  Please use our current Release or Beta instead.

Current Beta