FADEC
I think I have found my answer. If this is not correct I would appreciate someone with more knowledge sending me a detailed correction:
1. The FADEC is powered for five minutes after electrical power is applied to the aircraft.
2. The FADEC is powered when the overhead maintenance switch is placed to "on."
3. The FADEC is powered during engine start when the mode selector switch is moved from "NORMAL" or "NORM" to "IGN/START."