Why are modern computer controlled IAC valves heated with coolant? From what I have read, it appears coolant is there to prevent freezing. However, many believe coolant warms the IAC and controls operation. I think that used to be true with older designs where IAC valves had bimetallic springs and slowly closed as coolant temperature increased. With a computer controlled IAC valve, coolant lines to/from IAC valve do not affect operation, right? Thanks.