If your update has stalled or failed, this guide will walk you through why it happens and provide the exact steps to restore your hardware and complete the update. Why the DS100E Firmware Update Fails
With the device powered by the vehicle and connected via USB, you must link it inside the software interface. Launch your Delphi CARS or Trucks software. Go to the top menu and select > Hardware Setup . Under the Connection type tab, select Test (COM-port) .
Reopen the software, go to , and click Update . Step 4: Reviving a "Bricked" Red-Light Unit delphi ds100e firmware update problem link
Windows may fail to recognize the device correctly in "bootloader mode," causing the software to lose track of the hardware.
Prevention and best practices
Navigate to Windows Recovery settings and disable Driver Signature Enforcement . This is strictly necessary if you suspect a cloned FTDI chip is being rejected by the OS.
Connect the DS100E to your PC using a high-quality USB cable. If your update has stalled or failed, this
: If the update hangs, some users find success by starting the update in the software and then quickly disconnecting and reconnecting the USB cable, though this carries a risk of hardware failure.
: Always connect the device directly to your PC via USB cable . Avoid using USB hubs or Bluetooth during a firmware update, as connection drops can "brick" the device. Go to the top menu and select > Hardware Setup