[electro wrks]

I have used the early, simple, two wire Prius coolant pumps in cooling systems. Prius also has a three-way motorized coolant control valve in the 04-09 Gen 2 models, that I have not used yet:

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[electro wrks]

Looks like that valve may have a motor in it. Any idea how it works, the connection modes, & the pinout?

No idea, at this point. In this video at~8:30, one is taken apart. It's motor driven through a gear train. It looks like it has a simple, electromagnetically activated positioning switch or sensor. Or, it could have Hall sensors. Although, that would probably take more wires?

 

[electro wrks]

remy wrote: "Looks like a potentiometer. So there should be a feedback pin, and then a way to forward/reverse the motor".

I hadn't thought of the pot potential(sorry). The valve, from what I understand, controls coolant flow in and out of a thermos that stores hot coolant to aid in rapid warm-up of the gas engine. Also,this apparently provide some cabin heat with the engine off, reduces emissions, engine wear, sludge build-up in the crankcase, etc. Hey, it's an ICE thing! The motor drive along with some kind of position sensor(pot or otherwise) implies some kind of proportional control.
brian, we need a deep dive into this!