Manually change the COM Port Number to a low, stable number (such as or COM 2 ).
Troubleshooting Guide: How to Fix Delphi DS100E Update Problems
Windows often misidentifies the hardware loop, installing generic USB serial drivers rather than the dedicated diagnostic VCI drivers.
Locate the Firmware folder inside your primary software directory (e.g., C:\Delphi\Firmware ). Copy all binary configurations within this directory.
: Older DS100E microcontrollers struggle to communicate over modern blue USB 3.0 or USB-C hub splitters. Always plug the scanner directly into a native USB 2.0 port on your computer frame. delphi+ds100e+firmware+update+problem+top
Applying the methodology described above yields a high success rate.
Never attempt to flash your VCI tool over a basic USB link alone.
You connect the DS100E to your vehicle or PC. The green power LED flashes for a second, then turns solid red . The device is no longer recognized by the Delphi software, and Windows shows "USB Device Not Recognized."
If you're still stuck after trying these steps, providing specific details in a comment will help others give you a targeted fix. Manually change the COM Port Number to a
: Open your application. Navigate to Settings ➔ Hardware Setup .
: Ensure the VCI is powered properly during the update, ideally by the computer USB for firmware updates, rather than trying to power it from a vehicle's unstable OBD2 port. 3. Resolve Firewall and Driver Conflicts
Diagnose Underlying Hardware Issues
Choose as your primary tracking interface and select the designated COM port. Copy all binary configurations within this directory
Mastering the Delphi DS100E Firmware Update Problem: Top Causes and Solutions
If you are stuck with a "No VCI" error or a failed update, enthusiasts and tech tutorials generally recommend this recovery path: Manual Firmware Swap Navigate to your Delphi installation folder (e.g., C:\Delphi\Firmware Locate a known working firmware version (often version depending on your board type).
Updating directly through the software without initiating the "Firmware Update" tool properly in the settings menu, or disconnecting the cable during the process, is a major cause of corruption. 4. Hardware/USB Connection Failure