That error code is almost always caused by the combination of using a USB-serial converter with MS2 firmware. We occasionally see it, and when we do, we just try loading the firmware over and over until it works. Sometimes we try different boot jumper configurations upon powering up the ECU (i.e. leaving it installed while applying power, or having it initially removed, as the download-firmware.bat instructions seem to suggest); but I don't know if doing this necessarily helps.

My only other suggestion is to move whatever other device you have installed at COM1 to another port. Then upgrade the USB-serial adapter's firmware to the latest version you can find, and set it to COM1.

Good luck!

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-Paul

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