Reconnect the USB cable to the computer, but do not connect to the car yet. Step 5: Click Test and then Update in the software. 2. Troubleshoot USB Communication and Power
Many users try to update the firmware with only the USB cable connected to their laptop. The USB port rarely provides enough amperage to power the internal relays and flash memory during a firmware write.
Device completely stops responding; red LEDs light up permanently; failed update loops. How to Manually Downgrade or Move Firmware Files
Training and Documentation
Open your Delphi software, navigate to -> Hardware Setup , select the exact COM port number you assigned, and click Test .
Never attempt to flash or update the Delphi DS100E or DS150E unit while it is only plugged into your PC via USB.
: 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
If you are using a faulty USB cable or a USB 3.0 port (some older VCI devices prefer USB 2.0), the data transfer will fail. 5. Antivirus/Firewall Interference
[Windows Device Manager] ---> Set Port to COM 2 to 9 | [Delphi Software Settings] -> Match COM Port -> Run "Test" -> Click "Update" Step 3: Reinstall FTDI USB Drivers
Choose and navigate directly to your Delphi software root installation folder (e.g., C:\Delphi\Drivers or C:\Autocom\Drivers ). Reconnect the USB cable to the computer, but
The firmware update proceeds to 45%, 67%, or 92%—then freezes. You get an error: "Timeout on USB Write. Operation Failed." The DS100E is now bricked.
A "Tester Not Responding" warning often highlights a broken driver layer.
The DS100E uses a fragile FTDI USB chip. Windows 10/11’s power management loves to turn off USB ports to save energy mid-flash . Troubleshoot USB Communication and Power Many users try