Previously I have noted that sometimes the MFD will show the motor as not being on when I can hear it starting and running: Motor runs but does not show up on MFD? | PriusChat I have also previously noted that sometimes when the car stops the wheels on the display are shown turning for quite a while while the real ones are not - as the car is not moving. Today we went to a toxic waste drop off. This involved crawling around a parking lot, moving one car length at a time, for 40 minutes or so, following a previous 40 minutes doing the same thing on a city street just to get into the event. Naturally this drained the HV pack down to two pink bars. (Annoyingly the car isn't bright enough to realize what is going on and let the ICE run long enough to charge up the pack. Instead at that charge point it starts the ICE for every move, then shuts it right down again.) Anyway, while it was in this state, I noticed that at most stops the display was showing power going from the pack to the electric motor. Put it into park and all the arrows instantly went away. Put it back into drive and they returned. Press harder on the brake, much harder than I normally would to remain still on flat ground, and once again the arrows disappear. My hypothesis is that with brake pressure that is light the car tries to get the car to crawl by sending power from the pack to the electric motors, but the physical brakes hold. Press harder on the brakes and then it decides that the driver doesn't want to move and doesn't send power. If this is correct then the current should show up in Techstream. I felt that the amount of brake pressure needed to cancel the power transfer shown in the display was excessive, corresponding more to what I might use while holding the car on a significant grade, and overkill for keeping it still on the flat. (Not just this car, any car.) It crosses my mind that this might be something which needs to be calibrated, and it is out of calibration. Either because the car needs to go through a relearning procedure of some kind, or because the brake position sensor isn't sending the right information. Note, even though it was a fairly hot day (around 85F outside at the time) neither the AC nor the fan were on, we had all the windows down instead.
That is what it does. Whether the pedal pressure threshold is too high in yours is a question I can't answer, and seems maybe like a matter of personal taste. I like making very gentle stops, so usually my brake pedal pressure is quite light at the moment the car comes to a stop. Then, once it's no longer moving, I press harder and hold, so the drive torque cuts off. It's long-ingrained habit by now.
