You mean a gauge to indicate the engine's internal temp? There's not one because when they designed the car neither of us were asked if there should be one.
If you want to put one in, you might look at this article : http://www.techno-fandom.org/~hobbit/cars/ect/
Temperatures? We've got temperatures. Inside, outside, engine water, air intake, MG1/MG2, traction battery, tires (all 4 individually), plus a few others that I can't recall at the moment. The problem is that the only driver display is the red triangle that says that one of them is out of range. A ScanGauge can show many of them, and the Toyota Techstream scantool can show all of them.
Out of the box it will display engine coolant temperature. If you program the Xgauge feature you can choose from 7 other temperatures to display. It can also display RPM, throttle opening, HV battery current, and a bunch of other stuff. You can only display 4 things at a time though. check this thread: http://priuschat.com/forums/gen-iii...discussion/64406-scangaugeii-work-2010-a.html
For such a technologically advanced vehicle, I'm surprised they didn't consider offering displaying a lot more information than usual to the driver. Given that it's an electronic display, doesn't take much more resources to give us more information on how the vehicle is operating instead of making the complex HSD display. Something similar to a "debug" screen/info, but more closer to information one would expect from a FADEC - a nice monitoring screen might display engine RPM, temps, battery/bus voltage, oil pressure/temp, exhaust gas temps, etc.
It would be nice if they had provided more information but we, on PriusChat, are not average Prius owners. The average owner probably wants to know how fast they are going and how much gas in left in the tank, anything else would be to much to absorb.
Toyota got an "eye-ful" when I submitted my satisfaction survey. Since they used a generic form & asked about problems with the instruments I selected "yes" & said some of the problems are that coolant & inverter temps are missing. They also need to supply more feedback space. I ran out of room explaining my dissatisfaction. IMO the bottom line is that Toyota doesn't want to provide useful data to the driver/owner. It would rather have little problems become big problems that only the dealer can solve, hopefully out of warranty.
Ok, ok, I have the answer ... aroma therapy: Soft accelerator and braking - heat a flower smelling wax Hard accelerator and braking - heat a diesel smelling wax Speeds averaging +75 mph for 10 minutes - diesel Speeds averaging 65 mph for 10 minutes - whiff of roses Bob Wilson
