Note: This tutorial is for Civic, CR-V and Clarity only.
1. Use your PC to format a USB stick as FAT32. To format a USB stick larger than 32 GiB, you may need to download MiniTool (https://www.minitool.com).
2. Right click this link and save it as recovery.sh to the USB stick.
3. Attach the USB disk to your head unit and reboot your head unit. You may need to unplug the negative terminator of the battery to force a rebooting.
4. Wait 3 minutes and the head unit should reboot into recovery mode automatically.