Question about 2006 Volvo S40

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Noise while car is off

Buzzing http://youtu.be/MK2Eqzihmyo

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  • 6 more comments 
  • Max Toperzer
    Max Toperzer Mar 21, 2014

    more info. With car off this buzzing noise never stop. every 2 min it will do a click click noise then continue to buzz.

  • Max Toperzer
    Max Toperzer Mar 21, 2014

    see video


  • Max Toperzer
    Max Toperzer Mar 21, 2014

    see video

  • Ali Galam
    Ali Galam Mar 22, 2014

    Check out this linkhttp://forums.swedespeed.com/showthread....

  • Max Toperzer
    Max Toperzer Mar 22, 2014

    What ever this noise is its causing my battery to drain overnight. It sounds like its coming from the throttle body

  • Ali Galam
    Ali Galam Mar 23, 2014

    Maybe you could start pulling fuses until the noise stops to isolate the component that is still on after the car is shut down.

  • Max Toperzer
    Max Toperzer Mar 23, 2014

    I'll let you know how it turns out. Thanks

  • Max Toperzer
    Max Toperzer Mar 23, 2014

    pulled the ECM / Accel senror and noise stopped. I also noticed there was not a fuse for the alternator and the ECM. Very odd.

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  • 103 Answers

The noise is coming from the vacuum pump for the brake booster.

check all the hoses for the brake booster for a tight connection.

Posted on Mar 21, 2014

  • 2 more comments 
  • Max Toperzer
    Max Toperzer Mar 21, 2014

    Thanks Ali, I removed the vacuum pump and the noise remains. I placed my hand on the throttle body and I can feel it vibrate when it clicks. this happens every 2 minutes.

  • Max Toperzer
    Max Toperzer Mar 21, 2014

    Is there a way to see if the vacuum pump is toast

  • Max Toperzer
    Max Toperzer Mar 23, 2014

    I read somwhere that if you pump the breaks 3 to 4 times with car off, the pump should activate for a few seconds. Mine did just that.

  • Max Toperzer
    Max Toperzer Mar 23, 2014

    Guess I need spell check. Oops

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