This morning I saw something in the HSD that I don't understand. Base line conditions.: Air temp ~48 deg F. I had entered S4, verified with an "idle check," and easily finding/holding no arrows glide above 42 MPH. I then stopped for ~2 min. to debark passenger. Put the car in park, but did not turn off ICE -- I do this because I believe it "preserves" S4 over the stop. Resumed trip, but had difficulty finding/holding no arrows glide. Then it happened... Speed 47 MPH, 6 blue bars, roadway level/very slight down grade, can't find glide. Scan Gauge shows: 990 RPM, IGN 5 -- or maybe switching between 5 and 10 -- coolant temp 170 deg F. Mimic shows yellow arrows, battery assisted glide. 99.9 MPG The weird thing is this went on for over a mile with speed remaining at 47 MPH, and the six blue bars never changed. I was just agog, and going over a bump in the road I lost it. I motored up a slight rise with no arrows to/from the HV battery, and then went into a half mile long no arrows glide/regen as the expressway transitioned onto surface roads. Usually I arrive here with six blue bars. But today I had eight green bars. Can anyone help me understand what was going on -- the really low RPMs and IGN, (S3 perhaps?) the HV battery seemingly not discharging despite the extended yellow arrow "assisted glide," and the final full-up HV battery? Is it possible that the HV battery was being charged (MG1?) and discharged (MG2?) at the same time with the net charge increasing but staying in the sixth blue bar display range?
If you went to eight green without doing a whole lotta regen, you might have seen one of those very rare battery recalibration events. They do happen, but they don't plague the Prius nearly as much as they do the Insights. . _H*
Hobbit, What is a "battery recalibration event?" Did a quick Google search with no results. Is it a good thing? Just CPU/ECU housekeeping? There was some regen as the highway transitioned on a slight down slope to surface roads, regen roll-down from say 40 MPH to 10 MPH. I wouldn't call it a lot. I see this every day and it contributes to the typical six blue bars at this location. I'm gonna have to get off my butt and program the HV SOC, amps, and voltage XGauges into the SG. I suppose that readouts from the first, and one of the later two would be helpful investigative tools in a case like this.
