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Question: intermittent sound while driving?

Discussion in 'Gen 2 Prius Main Forum' started by AnalogColor, Jul 6, 2010.

  1. AnalogColor

    AnalogColor New Member

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    2007 Prius
    I am a relatively new owner of a 2007 Prius and am curious about a sound I hear quite often while driving.

    The sound is similar to a cd changer changing disks my package doesn't have the disk changer). It seems to happen when braking but I haven't pinned it down to one catalyst.

    It seems to be a normal sound and I am not worried about it since riding in my roommates '07 Prius and heard the same sound.

    Any insight on this sound?

    Thanks!
    Joe
     
    #1 AnalogColor, Jul 6, 2010
  2. BAllanJ

    BAllanJ Active Member

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    I bet it's the brake systems accumulator pump
    ... does it sometimes go even when the car is off?

    That pump maintains a pressure for the odd and complicated brake system...inchuding the pedal feel which is simulated.
     
    #2 BAllanJ, Jul 6, 2010
  3. edthefox5

    edthefox5 Senior Member

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    Yep its the accumulator. Sounds like a rattlesnake kinda.
    Does it all the time.
     
    #3 edthefox5, Jul 8, 2010
  4. cwerdna

    cwerdna Senior Member

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    The rattlesnake-like brake noise should be repro if you pump the brakes repeatedly, even if the car's power is off.
     
    #4 cwerdna, Jul 8, 2010
  5. AnalogColor

    AnalogColor New Member

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    I'll try that out next time I'm in my car. Thanks!
     
    #5 AnalogColor, Jul 8, 2010
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