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What's That Sound?

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by Witness, Jul 24, 2013.

  1. Witness

    Witness Active Member

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    Hi All,

    You ever notice that sound coming from the driver side footwell after you powered down? After a minute or two, there's this "clunk-clunk sound" and something sliding for a few seconds. What are you doing down there PiP, I want to ask. I'm sure it's a normal routine the card does, but it does worry me that there is some kind of moving part down there that can potentially fail in the future. What is that thing?

    Thanks,
    Clunk-Clunk..ssshhh... :D
     
    #1 Witness, Jul 24, 2013
  2. Dan Cathy

    Dan Cathy Junior Member

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    Yeah...I get that too.
     
    #2 Dan Cathy, Jul 24, 2013
  3. bisco

    bisco cookie crumbler

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    no, but i usually walk away after shutting down. it might be the johnson servo disconnecting.
     
    #3 bisco, Jul 24, 2013
  4. mrbigh

    mrbigh Prius Absolutum Dominium

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    never heard the sound yet, better yet, I never paid attention .
    I would like to find out from other PC participants the origin of it
     
    #4 mrbigh, Jul 24, 2013
  5. mmmodem

    mmmodem Senior Taste Tester

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    Yup about 2-3 minutes after shutting off the car I hear that clunk. No idea what it is.
     
    #5 mmmodem, Jul 24, 2013
  6. Dan Cathy

    Dan Cathy Junior Member

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    In the morning, when you first open the driver side door, you should also hear another sound. It sounded like something is winding up.
     
    #6 Dan Cathy, Jul 24, 2013
  7. bisco

    bisco cookie crumbler

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    clockspring?
     
    #7 bisco, Jul 24, 2013
  8. VicVinegar

    VicVinegar Member

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    Yup, get both. I'm surprised it isn't covered somewhere already.
     
    #8 VicVinegar, Jul 24, 2013
  9. Ken Blake

    Ken Blake Active Member

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    I suspect it is the vacuum pump generating vacuum so your brake booster will function, despite the fact that there is no engine vacuum available.
     
    #9 Ken Blake, Jul 24, 2013
  10. Dan Cathy

    Dan Cathy Junior Member

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    Sort of
     
    #10 Dan Cathy, Jul 24, 2013
  11. SLOW_RR

    SLOW_RR Member

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    Does it go.. GLUG, GLUG, GLUG, GLUG, GLUG, GLUG, GLUG, GLUG?

    No? Hmmm. Oh, that's the air pump for the brakes on the old GE 80 tonner locomotive out at the railroad museum. It's even louder than the ALCOs. Hmmm? I would tend to agree with those that think it may have something to do with the release of a pressure reservoir for the power assist on the brakes. It would also likely make a sound as it turns on upon entering the car from the drivers door....
     
    #11 SLOW_RR, Jul 24, 2013
  12. retired4999

    retired4999 Prius driver since 2005

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    Yep! bisco, I knew Yours was a toy wind -up! and now you broke the spring! :cry:
     
    #12 retired4999, Jul 24, 2013
  13. bisco

    bisco cookie crumbler

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    actually, the sound is my feet on the ground pushing the car.:cool:
     
    #13 bisco, Jul 24, 2013
  14. retired4999

    retired4999 Prius driver since 2005

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    :D (y)
     
    #14 retired4999, Jul 24, 2013
  15. chesleyn

    chesleyn Active Member

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    My 06 Honda civic hybrid used to make fart noises when I would brake. Always had to explain that issue to my travel companions.


    iPad ? HD
     
    #15 chesleyn, Jul 25, 2013
  16. retired4999

    retired4999 Prius driver since 2005

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    Ah! brake accusatory. They could be really loud. Ah Memories! :)
     
    #16 retired4999, Jul 25, 2013
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