[SoCal LS-L]

I just realized something that may help.... I went around the same left turn my car died on, in my moms RAV4, and noticed theres some pretty bad jarring from potholes at the exact spot my car stalled. I think now something got jarred loose! Forgive me for not knowing, but where is the ECU at? I thought it was behind the pass side kick panel for some reason.... I want to check all my grounds and power feeds before giving in and going to Lithia...who ive been reading arent all that swell.