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Curious

Discussion in 'Gen 3 Prius Main Forum' started by hotbrass, Oct 13, 2009.

  1. hotbrass

    hotbrass New Member

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    I was sitting in park with power on reading my mail in the USPS parking lot.

    I pushed on the accelerator and the ICE started. When I let off the accelerator the ICE stopped. Did it several times just to make sure it wasnt simply trying make up for a current draw.

    Is there a reason the ICE will start in park when the accelerator is pushed. I would have thought that the car would be smart enough to know that the ICE was not needed.

    Just curious.:confused:
     
    #1 hotbrass, Oct 13, 2009
  2. a priori

    a priori Canonus Curiosus

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    It may just be smart enough to figure that the driver would be smart enough to push the accelerator only because he/she anticipated a power demand! :D

    After all (and more seriously, this time), what possible benefit may be had by pressing the accelerator pedal when in Park?
     
    #2 a priori, Oct 13, 2009
  3. hotbrass

    hotbrass New Member

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    None?

    So why would the ICE start if there is no benefit?
     
    #3 hotbrass, Oct 13, 2009
  4. eglmainz

    eglmainz New Member

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    I understand that this feature is there so that if you are troubleshooting something, you are able to turn the car on as needed. I did not search through all the threads again for this, but I know that I read it on the blog, and then tested this in my car a while ago.

    It works, I'm just not sure why. (I think it was initially posted under most obscure Prius facts, or something like that).
     
    #4 eglmainz, Oct 13, 2009
  5. hotbrass

    hotbrass New Member

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    Makes as much sense as anything I can think of.

    Thanks EGLMAINZ!
     
    #5 hotbrass, Oct 13, 2009
  6. fuzzy1

    fuzzy1 Senior Member

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    (1) forced battery recharge;
    (2) forced warmup;
    (3) test for presence of fuel in tank;
    (4) test whether engine works;
    ...

    I vote with a_priori ... Prius decides that you pushed the gas pedal for a reason, not necessarily known to it, so at some point it will respond.
     
    #6 fuzzy1, Oct 13, 2009
  7. usbseawolf2000

    usbseawolf2000 HSD PhD

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    I think this is a feature to force charge the HV battery.

    It can also be used during coolant change to get rid of the bubbles.
     
    #7 usbseawolf2000, Oct 13, 2009
  8. eglmainz

    eglmainz New Member

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    While this is also what I think happens, the limited amount of testing I did (5 minute engine run with 3 bars battery SOC) showed that it did not in fact recharge the battery noticeably.

    Does anyone know for certain if the electric connection from the MG to the batteries is open when the car is in park? It has been confirmed that it is disengaged in ‘N’ and engaged in ‘D’. I would assume that it is also engaged during ‘P’ and ‘R’, but would like to know what the status is in ‘P’.
     
    #8 eglmainz, Oct 14, 2009
  9. SlowTurd

    SlowTurd I LIKE PRIUS'S

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    i think it's a communist plot
     
    #9 SlowTurd, Oct 14, 2009
  10. pinzvidz

    pinzvidz Junior Member

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    Ppl there's a "maintenance mode" for running engine work (i.e. bleeding coolant, checking ignition timing etc.)

    With power off, foot off brake pedal
    Press power button twice (to ign on state)
    Press accelerator pedal twice
    Shift to Neutral
    Press accelerator pedal twice
    Shift to Park
    Press accelerator pedal twice
    Press power button (goes to ready state) engine will start and keep running

    Maintenance mode will be displayed in the MFD, VSC light will be on for duration of mode.

    Power off to cancel MM.
     
    #10 pinzvidz, Oct 14, 2009
    Rizzphoto likes this.
  11. hotbrass

    hotbrass New Member

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    You left out the third step, slaughter a lamb at midnight on the second full moon of the month.

    Where do they get these programmers. Must be Japanese!
     
    #11 hotbrass, Oct 14, 2009
  12. pinzvidz

    pinzvidz Junior Member

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    That's nothing. You should see some of the crazy tap dancing on brake and accelerator pedal/door opening and closing performances when it comes to programming new immobiliser keys on various non SKS Toyota vehicles.
     
    #12 pinzvidz, Oct 14, 2009
  13. qbee42

    qbee42 My other car is a boat

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    Just like playing a Wurlitzer Theater Organ, only harder.

    Tom
     
    #13 qbee42, Oct 14, 2009
  14. Mark100k

    Mark100k Dipwad Member

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    I heard there was an issue with smog testing of prior generations. The ICE shuts off which makes it impossible to test. Maybe this is the fix, as it allows the engine to be run when in park.
     
    #14 Mark100k, Oct 18, 2009
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