Quote:
Originally Posted by pcmentor
I think the coolant hoses are on the air valve to keep it hot say when you turn off the engine at a store and then come out 20 mins later. The valve will still be hot without having to heat up the electric bimetal lever electrically. How does this sound?
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Possibly that's why the coolant lines, but I can't verify anything you or I have figured. It seems the techs at Toyota don't know much about the older models like ours since they don't work on them much....or AT ALL..lol! Then again, maybe I just haven't talked to the right person, yet.
I've thought about those coolant lines and what you're suggesting, but it seems to me that might be what the coolant temp switch is for on the thermo housing. That's all I can surmise since this switch seems to serve no purpose for anything else. (I'll have to hunt for a wiring diagram, on that). The other thing is the element on the AAV seems to work only one way.....to heat and not detect temps. There's only two wires to it, after all, and one is voltage and the other would have to be a ground. Look at heated O2 sensors, for example, on later models. There's four wires; one to heat and it's respective ground, and another for signal/voltage with it's respective ground. Again, I don't know...just figurin'. Soooo, if the AAV element does nothing but heat, I can't see the point in the bypass coolant lines. How does THIS sound?
