rambeau

hi everyone, this is my first post, hopefully i'm including everything i need to here, i need some advise, i have a 1998 gs300 recently i got a tps error changed it and got a idle valve motor error, i removed the motor and noticed the gear that i believe operates the butterfly for the air intake spins freely, completely separate from the motor, is this normal ? i put it back together, still idles rough but throws a speed sensor error warning and says nothing about the motor even though i made no changes to it, very confused. all else aside is this gear supposed to free spin?