If you purchase a new version of the diagnostic software, always run the firmware update tool before attempting to scan a vehicle.
The software is looking for the DS100E on one virtual COM port, but Windows has assigned it to another.
A faulty USB cable or changing the USB port during the update can interrupt the process.
Plug the 16-pin OBD2 connector of your DS100E into a vehicle's OBD port, or connect it to a stable 12V external power supply on your workbench. Once powered by 12V, connect the USB cable to your PC. 2. Verify Windows Device Manager Drivers
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By following the solutions and tips outlined in this article, users can resolve the Delphi DS100E firmware update problem and ensure that their device is running with the latest features and fixes.
Some users have found success by forcing the COM port to a specific number, such as COM 28, in the Windows Device Manager to clear communication conflicts.
Run the installer.exe with administrator privileges.
: Antivirus software frequently flags diagnostic keygens or firmware tools as "false positives." Temporarily disable real-time scanning or add the Delphi folder to your exclusions. If you purchase a new version of the
The most common cause for the "link" error on older genuine units and cloned units is that the specific firmware update servers for the DS100E hardware revision have been depreciated or moved. As Delphi (now settled under the CARS and TRUCKS brand umbrella) pushes newer hardware like the DS150E v2 or BlueTech adapters, support pathways for older DS100E units are sometimes orphaned.
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An interrupted firmware update is the primary cause of a "bricked" VCI. Before starting any update, ensure your computer has a stable internet connection, use a high-quality USB cable, and—most importantly—never disconnect the VCI or shut down the PC until the process is completely finished.
With the drivers fixed, ports optimized, and external power applied, run the update link inside the application. Plug the 16-pin OBD2 connector of your DS100E
The Delphi DS100E (and its successor, the DS150E) often encounters a common firmware update failure where the device becomes "bricked" or is not recognized after a software update. This typically happens when the software version on the PC does not match the firmware version on the VCI (Vehicle Communication Interface) hardware. 🛠️ Common Firmware Problems
"Vehicle Not Responding" after a successful update.
⚠️ Anonymous access to downloads is not permitted. You will need to use specific usernames and passwords provided in the instructions PDFs above to access the files.
Navigate to your software installation folder (usually C:\Program Files (x86)\Delphi Diagnostics\CARS\Firmware ).