If your software displays a "Communication Error" or hangs at 0% during the update, the software firmware folder likely contains files incompatible with your hardware chip. Replacing these files manually fixes the loop. Close your diagnostic software completely.

Running the firmware update only via USB without a 12V supply.

: Connect the interface to a 12V power supply (vehicle OBD port or external adapter) and the laptop via USB before initiating the update. A power loss during the flash can corrupt the firmware. Driver Reinstallation Device Manager Find the "USB Serial Port" under Ports (COM & LPT).

What (like Windows 10 or 11) runs on your laptop?

If you are facing a stop, do not panic. This comprehensive guide covers the exact reasons why these updates fail and provides step-by-step instructions to successfully restore and update your device. Why Delphi DS100E Firmware Updates Fail

: Close background programs that might interfere with the COM port and ensure you are using the firmware version compatible with your specific software release (e.g., version 1622 for 2017.3 software). Best Practices for Future Updates Delphi DS150E Firmware Upgrade Procedure

If SP Flash Tool detects nothing, you need to force preloader mode by shorting specific test points on the motherboard. This requires:

Keep the device connected until the process is fully finished.

: Long or poor-quality cables can cause data drops. Switching to a high-quality, shorter cable often fixes "stuck" updates.

For further help, are you using an device? Also, what Windows version and Delphi software version (e.g., 2017.3 or 2021.10b) are you currently running? AI responses may include mistakes. Learn more Delphi DS150E Firmware Upgrade Procedure