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Whoop?

Discussion in 'Generation 1 Prius Discussion' started by Johnmo, Sep 16, 2012.

  1. Johnmo

    Johnmo Junior Member

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    Yeah so on the way to the UCLA game last night, after the car warmed up, I started hearing a whoop sound coming from the back I thing. This is the second time I heard it doing this in the month I've owned it. It happened under some acceleration and sounded a bit like the beginning of a police siren. Not every time though.

    Hit accel, one whoop, that's it.

    2003 BTW.
     
    #1 Johnmo, Sep 16, 2012
  2. joedirte

    joedirte Member

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    Probably the fan for the battery. Maybe the bearings are going, but that is behind the driverside rear seat and doesn't run a lot of the time until batteries are hot.
     
    #2 joedirte, Sep 18, 2012
  3. z_clark

    z_clark Junior Member

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    We have had the same "woop" on our 2003 w/ 180k on it. Glad to hear we are not the only ones! We have been hearing it 6 months and maybe once every 15 days or so. We thought it might be the radio, but never have pinpointed it.

    How could I check the battery fan?

    I tried googling "Prius twerp" a few months ago to seek assistance, but the results were all about twerps that drove a Prius...lol.
     
    #3 z_clark, Sep 18, 2012
  4. Johnmo

    Johnmo Junior Member

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    revising my earlier report. The "Whoop" is happening when the gas engine starts. I initially thought it happened under acceleration but today, stopped at a traffic light with the A/C running, the gas engine kicked on and I heard the whoop.

    It does appear to be coming from the vents above the back seats. So Joe's idea that it might be the fan/bearings sounds consistent.
     
    #4 Johnmo, Sep 19, 2012
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