It will say "ecu in test mode" then "bootloader" a few times. But as soon as it starts running bootloader I noticed that it loses the ecu. Ive used ecuflash and ecuexplorer. I have the same error code. But with ecuexplorer you can actually see in the left box it will say ecu disconnected after it recognizes it in test mode.
I'm able to read realtime data from ecuflash and explorer. Also able to adjust idle speeds. God forbid I try to test write~! lol