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
     
  2. Dan Cathy

    Dan Cathy Junior Member

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    Yeah...I get that too.
     
  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.
     
  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
     
  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.
     
  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.
     
  7. bisco

    bisco cookie crumbler

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    clockspring?
     
  8. VicVinegar

    VicVinegar Member

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    Yup, get both. I'm surprised it isn't covered somewhere already.
     
  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.
     
  10. Dan Cathy

    Dan Cathy Junior Member

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    Sort of
     
  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....
     
  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:
     
  13. bisco

    bisco cookie crumbler

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    actually, the sound is my feet on the ground pushing the car.:cool:
     
  14. retired4999

    retired4999 Prius driver since 2005

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    :D (y)
     
  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
     
  16. retired4999

    retired4999 Prius driver since 2005

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    Ah! brake accusatory. They could be really loud. Ah Memories! :)
     
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