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jarring, screeching noise.......

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Matthew J Anderson, Aug 5, 2019.

  1. Matthew J Anderson

    Matthew J Anderson New Member

    Joined:
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    Location:
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    Vehicle:
    2012 Prius
    Model:
    Three
    The car had been very quiet when I bought it at 43k miles. However, it now has 80k miles on it. I brought the car to the dealer to have them check it out/diagnose it. They stated it was a normal noise, which I thought it was weird.

    To describe what noise I am talking about:

    I turn the car on, to run, with "ready" displayed. I let the AC, with fan on HIGH, Lights turned on, wiper blades turning, every known device running as I purposely drain the IMA hybrid battery. When it gets depleted, the engine is forced to run and charge it back up a little bit then cuts off when it has some reserve power stored in the hybrid battery. During this time when it cycles between charging mode, and start of discharge (engine turned off, but accessory running mode,) there is a loud jarring noise that is audible from the engine. I can hear it sometimes while driving as well in slow traffic at traffic stops. To me, it sounded like a loud worn out AC cycling clutch engaging/disengaging, but the hybrids don't have that, as it is electrical.

    Any suggestions what to look at, or if it is indeed "normal?" Should I go to another Toyota dealer and get a second opinion?
     
    #1 Matthew J Anderson, Aug 5, 2019
  2. ChapmanF

    ChapmanF Senior Member

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    It would probably help a lot to post a recording if you can ... I just read all that and still have no idea what sort of noise you've got.
     
    #2 ChapmanF, Aug 5, 2019
  3. bisco

    bisco cookie crumbler

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    the electric a/c is noisy and gets noisier when it is dying. any change in sound when you switch it off and on?
     
    #3 bisco, Aug 5, 2019
  4. sam spade 2

    sam spade 2 Senior Member

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    Yes.

    I hope the starting procedure above is just for diagnosis purposes.......because doing that on a routine basis is just.....well......not wise. ;)
     
    #4 sam spade 2, Aug 5, 2019
    Montgomery likes this.
  5. tankyuong

    tankyuong Senior Member

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    Egr circuit needs to be cleaned
     
    #5 tankyuong, Aug 5, 2019
  6. bisco

    bisco cookie crumbler

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    how can it be normal, when it didn't make the noise for 80k?(n)
     
    #6 bisco, Aug 5, 2019
  7. ChapmanF

    ChapmanF Senior Member

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    a recording would answer so many questions
     
    #7 ChapmanF, Aug 5, 2019
  8. Grit

    Grit Senior Member

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    Are you sure the car is a prius? I know a non-toyota hybrid vehicle that uses the acronym "IMA"
     
    #8 Grit, Aug 5, 2019
    CR94 likes this.
  9. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

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    I’m with you in that I think it’s a funny way to spell “HSD” but I got the gist of what he was saying anyway, you know?

    We all want to see (and hear) “Jarring, screeching noise… THE MOVIE” (2019)
     
    #9 Leadfoot J. McCoalroller, Aug 5, 2019
  10. schmuber

    schmuber Member

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    JARRS

    In theaters this Christmas
     
    #10 schmuber, Aug 5, 2019
    Leadfoot J. McCoalroller likes this.
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