So against my better judgement, I left my 2017 Four Touring parked in our Fort Myers, FL driveway undisturbed from just before Memorial Day of this year until today, November 6th. (I'm tired of driving back and forth between Florida and New York every fall and spring.) It was under a cover until the recent hurricane blew it off, but I've felt how warm it gets in the cabin even with the cover on, and I am quite aware that the cover doesn't help that much to reduce the temperature in there. Although I couldn't find it anywhere in the manual, I seem to recall that leaving the car without starting it over a 60 period voids the hybrid warranty. So it was with considerable trepidation that I went out to the car this morning after replacing the original 12V battery and tried to start it. Wonder of wonders, the hybrid battery started the ICE without a hiccup. Prior to putting my foot on the brake and pressing the start button, I tried to use my Carista app to check the voltages of the modules while in the Ignition On mode. I thought I had been able to do this before, but possibly, as I realized after actually starting the car, I had used Dr. Prius for that purpose on prior occasions. Anyway, after running the ICE for several minutes, I did switch over to Dr. Prius and took the screen shot attached. Perhaps, I need to run the app while driving around to get a more complete picture (I will do that tomorrow once the car is insured again), but for now I am just relieved that I was able to start the car.
i'm glad it started for you! you may want to rethink your strategy. as the battery gets older, it will be less and less happy with being left sitting that long. especially in the heat
Don't quote me on this but I believe I read somewhere that your suppose to place the car in ready mode every 60 days for at least an hour or two. That allows the car's ECU to maintain the traction battery. I think it was under the long term storage.
Thanks for your comments. Before doing what I did, I tried to research the cost of replacing the hybrid battery, just in case. It's very hard to get good information on that, especially for the lithium version that I have. I would guess this is because relatively few have had to be replaced so far, which is actually a good thing. I suppose I really should trade the car for an ICE vehicle, given my snowbirding habit and my aversion to driving long distances at my age (70 in a couple of months), but I am really fond of hybrids in general, and this car in particular. For the data points that others might be able to use, I will try to give an annual update if I keep doing this until the battery dies.
Sorry about that HV batt Dave. Some of our snowbird relatives do the AutoTrain ...my town is one town over from Lorton VA. .Welcome the septuagenarian Hybrid club, we went with RAV4HV next.
Nothing to be sorry about yet. In the 6 years we owned our Gen 2, it sat around for weeks and sometimes a month or more at a time and the (original) hybrid battery never threw a code. We gave it to charity when it was 15 years old with 301k miles (and replaced it with a new Corolla hybrid), partially because we were afraid of the HV battery eventually dying, but more because we didn't want to deal with the intermittent combo meter issue. I did put the Gen 4 on the Autotrain to get it down here, but going back and forth that way all the time would get expensive, and it would mostly sit around in NY anyway, since my wife prefers the Corolla (whose trunk lid she can actually reach when it is open ;-)).
Our 3rd gen was purchased new, off the dealership lot, in November 2010. It had about 10kms on the odometer. A month or two later I notice the decal in the driver's door opening, said build-date was August 2009 (roughly 15 months previous). The 12 volt battery was dead as a doornail*, but the hybrd seemed fine, still does. To be fair, maybe a brand-new battery is more resiliant, in such a scenario. * Open Road Toyota Port Moody actually tried to hide the mask the dead 12 volt battery, had the car running when we showed up for a test-drive,to "warm it up" for us. We got charged full dealer-prep, and when I checked the temp spare it was at 40 PSI.