Is it OK to switch modes while in motion?

Discussion in 'Prime Technical Discussion' started by ml888, Oct 5, 2017.

  1. ml888

    ml888 Member

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    New owner here. Love the car and have some questions. I believe these things are OK but just want to confirm:

    1. While in driving gear and in motion, press the button to switch b/w HV / EV / EV Auto.
    2. Also while driving, press the button to switch b/w Eco / Normal / Power modes.

    I think some users mentioned that they switch b/w HV / EV based on driving situation, so I guess it must be OK? Just want to know if it's going to hurt anything at all.

    Thanks!
     
  2. wb9tyj

    wb9tyj 2017 Prius Prime Advanced

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    won't hurt a thing...i switch back and forth as needed...
     
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  3. Skylis A

    Skylis A Senior Member

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    You will notice difference in accelerations and responsiveness among the various modes. But no the car is not going to "break" just playing with those buttons since the computer makes the transitions smooth.
     
  4. ml888

    ml888 Member

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    Thanks! BTW someone mentioned press and hold HV/EV button will force charging? Is that right? I couldn't find it in the manual.
     
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  5. priuscatprimeguy

    priuscatprimeguy Senior Member

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    correct
     
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  6. dalcon95

    dalcon95 Senior Member

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    Screenshot_20171006-215650.png

    #1 in Easley,SC
     
  7. ml888

    ml888 Member

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    Cool, thanks! I spent literally an hour sifting through multiple manusal and didn't notice this. I gotta go to that page and check again ... ...
     
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  8. fabio

    fabio New Member

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    Something I didn't know. Will probably be using this a lot now lol. Thanks!
     
  9. FuelMiser

    FuelMiser Senior Member

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    You might want to register with Toyota Owners Official Web Site with your VIN number, and then you can download PDF versions of the manuals. Then it is easy to search electronically for terms...
     
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  10. fabio

    fabio New Member

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    There should be a manual available online. They usually go for on ebay anyways :)
     
  11. zigzag

    zigzag New Member

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    Thanks for posting that. I thought it must be possible but had not found it yet in the manual.
     
  12. SteveMucc

    SteveMucc Active Member

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    It's all software.

    In HV mode the car is constantly switching the ICE on and off (it's always doing some sort of electric drive at a minimum just to engage the sun gears in the transmission even if the ICE is on).

    those buttons just change the pedal mapping (echo/normal/pwr, the ac settings (echo/others)) and how and when the ICE comes on (hv vs ev vs ev auto). All of that is controlled by the computer and those buttons are simply inputs to the computer. The computer is ultimately the thing that decides what to run and where and these are just settings, but ultimately it's all up to the computer.
     
  13. sistersinhim

    sistersinhim Junior Member

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  14. Salamander_King

    Salamander_King Senior Member

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    It is probably never "necessary" to use the Charge Mode. But if you are low or out of EV range, and you are on highway at fairly good speed 50-70mph, and expect to hit a stop-and-go city traffic later before you have a chance to plug-in, then you can use the Charge Mode to increase EV range (up to 80% max) so you can do pure EV drive later. Still it is generally not cost effective to use gas engine to charge the battery.
     
    #14 Salamander_King, Dec 13, 2019
    Last edited: Dec 13, 2019
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  15. drash

    drash Senior Member

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    Well during normal HV operation the battery is always “force charged” while the engine is running up to the HV level. But if you are talking about force charging the EV level by pressing the EV/HV button for 3 seconds, then no. It’s not a necessity unless you have a specific requirement. Here’s a couple scenarios where it may require you to use it.

    1) if you go on a trip and end up using all of your EV before getting there and you want to use remote climate (or the A/C button).

    2) if you go on a trip and end up using all of your EV before getting there and you want to use EV instead of gas. Like pulling into the neighborhood at 3 AM and don’t want to wake anyone.

    This of course assumes there is no (or cheap) charging structure en route.


    Unsupervised!
     
  16. sistersinhim

    sistersinhim Junior Member

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    That was my thought. I think the hybrid would make better sense. If in stop and go traffic the ice will run infrequently and the braking will charge it back up.

    How does the forced charging work differently than the regular hybrid charging?
     
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  17. drash

    drash Senior Member

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    The engine stays on until force charging is either canceled (by pressing the EV/HV button again or the EV Auto button) or it charges the battery up 80%.


    Unsupervised!
     
  18. sistersinhim

    sistersinhim Junior Member

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    Ah, that makes sense. Thanks.
     
  19. bisco

    bisco cookie crumbler

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    that's 80% of the whole battery, not just the 'hybrid' portion
     
  20. jerrymildred

    jerrymildred Senior Member

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    To be more specific, 80% of the portion of the battery that Toyota makes available for EV/HV driving. It will show as 80% on the SOC indicator.
     
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