Locate the "Unknown Device" or the existing "USB Serial Port" under Ports (COM & LPT). Right-click it and select .
to ensure you have the latest compatible version (currently up to DS 2025.05
: Close any conflicting customization or diagnostic software that might interfere with the USB port during the update. VCI Recovery Procedures delphi ds100e firmware update problem link
Once the software successfully identifies the device and displays your serial number, click the button.
Firmware updates bridge the gap between your physical VCI (Vehicle Communication Interface) hardware and the newer diagnostic software versions (like Delphi CARS or Autocom). When this process fails, it is usually due to one of four common issues: Locate the "Unknown Device" or the existing "USB
Real-time scanning can sometimes block the firmware write process.
Thanks in advance.
The Delphi DS100E has been around for a while, but it's still a capable diagnostic tool. It communicates with your vehicle through a Vehicle Communication Interface (VCI) module that connects to the OBD-II port. The official software runs on a Windows PC or laptop. Knowing the two main hardware versions of the DS100E is important because they use different firmware:
If you encounter an error, here is how to troubleshoot the most common scenarios: Thanks in advance
If you attempt to flash a firmware version meant for a single PCB onto a low-quality dual PCB unit, the update will fail, and the device will stop communicating. 2. Driver Conflicts