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Servo-like noise when opening door

Discussion in 'Gen 3 Prius Technical Discussion' started by webbkr, Sep 27, 2014.

  1. webbkr

    webbkr Junior Member

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    I've had my 2014 Prius II for about a month now and am really happy with the car. I do however have a question. Every time I go the garage and open the driver's door to get in the car, I hear a servo-like noise under the hood lasting for a few seconds. probably 5-6.

    Can anyone tell me what may be causing that?

    Thanks,
    Ken
     
    #1 webbkr, Sep 27, 2014
  2. StarCaller

    StarCaller Senior Member

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    your brake system gets primed/
     
    #2 StarCaller, Sep 27, 2014
  3. David Beale

    David Beale Senior Member

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    Yes, the Prius has a hydraulic brake booster and it looses pressure in just a few hours of down time. It pressures up when the -drivers- door is opened, as the car gets ready for you to drive. It doesn't do that when the passenger or rear doors including the hatch are opened. Some cars hold the pressure longer, some shorter. Pearl held it overnight, Pearl S not so much. A few hours and it runs the pump when the drivers door is opened.
     
    #3 David Beale, Sep 27, 2014
  4. Grren4ever

    Grren4ever Active Member

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    It's your car's way of saying "hello." :). at least that is what the dealer told me
     
    #4 Grren4ever, Sep 27, 2014
  5. bisco

    bisco cookie crumbler

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    i climb in from the passenger side to avoid that.
     
    #5 bisco, Sep 27, 2014
    csp1971, dave conlon, sfprankster and 2 others like this.
  6. xliderider

    xliderider Senior Member

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    It's still going to do it when you power on the car though. :confused:

    SCH-I535
     
    #6 xliderider, Sep 27, 2014
  7. bisco

    bisco cookie crumbler

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    dang!
     
    #7 bisco, Sep 27, 2014
  8. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    I was idly wondering the other day, if I snuck in the passenger side, climbed over the buttress (THAT'S why it's there) and powered up the car, would the brakes be messed up? Xliderider's ruined my fun.
     
    #8 Mendel Leisk, Sep 27, 2014
  9. bisco

    bisco cookie crumbler

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    i thought i was getting away with something...
     
    #9 bisco, Sep 27, 2014
  10. David Beale

    David Beale Senior Member

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    Repeat after me: "My car is smarter than I, my car is smarter than I".
     
    #10 David Beale, Sep 28, 2014
  11. mediahound

    mediahound Active Member

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    Also realize your car will make a buzzing noise about 8-10 hours after driving it too. Something to do with the fuel evaporative system.
     
    #11 mediahound, Sep 28, 2014
  12. kenmce

    kenmce High Voltage Member

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    It is the digital equivalent of a stretch and a yawn.
     
    #12 kenmce, Sep 29, 2014
    Mendel Leisk likes this.
  13. Starship_Enterprius

    Starship_Enterprius Active Member

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    I thought it was just purring at me.
     
    #13 Starship_Enterprius, Sep 30, 2014
  14. David Beale

    David Beale Senior Member

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    You will find an explanation in the owners manual, if you have the patience to hunt it down.
    In fact, I will say it again. And I "paraphrase".
    -Any sound the Prius makes at any time is normal.- Which is what you come away with after -fully- reading the manual. ;)
     
    #14 David Beale, Sep 30, 2014
  15. IanIanIanIan

    IanIanIanIan Member

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    My UK PiP also 'breaks wind' some minutes after turning the power off.
     
    #15 IanIanIanIan, Jan 20, 2015
  16. Redpoint5

    Redpoint5 Senior Member

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    ... and that's why incompetent is a generous evaluation of those that work at the stealership.
     
    #16 Redpoint5, Jan 22, 2015
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