FSX-MS Diamond DA42 ECU Swap Switch

[idude]

What these two switches for?  I know that ECU stands for Engine Control Unit but  I have no idea what these are used for!

[Guest]

Basically the switch switches between the two ECU systems for checking during the run-up. Think of them as the Mag Check (1 and 2 - On/ Off - watch for the rev drop)

In flight the DA-42 will switch if the ECU 1 fails to ECU 2 so it parts company with the Mag similarity at that point.

More info here:

https://www.euroga.org/forums/report-on-the-double-ecu-fail-message-i-had-the-other-day-da40ng/7148?page=1