David Richoux wrote: > > David Katsuki wrote: > > > > Where is there a coolant pressure sensor in the system? I've never seen > > one and don't recall > > any reference to one in the manual. > > as I mentioned in another part of this thread, AFAIK the coolant pressure is > determined by the temperature sensor - if the pressure is high the computer assumes > that the temperature is high. That is what the techs at VWOA HQ told me More like the other way around, IF the system is sealed. But I don't think the computer is concerned about the coolant pressure. >They may have been full of crap, You called that one.
> but anyway, from the Bentley I cannot tell how the Temperature Sensor II actually > works (thermocouple or pressure) - anybody know? > Semiconductor material with a NTC (negative temperature coefficient), meaning that its resistance goes down as the temperature goes up. BTW a thermocouple is a junction of two different metals which produces a small voltage which increases with temperature, not used in stock vanagons, AFAIK. Larry A. |
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