2007 Prius Pump Sound

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by wooha2000, May 12, 2019.

  1. wooha2000

    wooha2000 Junior Member

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    There was a thread on this but it seems to have died. But someone posted having this exact same sound. I am wondering if anyone knows what it is and should it be fixed? It is coming from the drivers side of the car under the relay and fuse box. It has been happening for about 8 years and is intermittent. Does not seen to impact operation of the vehicle that I have noticed in any way... except is it very annoying. You hear it when the gas motor is not running.. so idling at stop light, etc. But not all of the time.

    Just wondering if it is something that needs to be fixed or is it normal?

    Thanks
    Harvey

    Link to youtube video:
     
  2. audiodave

    audiodave Active Member

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    That's around where the inverter coolant pump is. Maybe pull the fuse on that and see if it stops.

    Posted via the PriusChat mobile app.
     
  3. JC91006

    JC91006 Senior Member

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    That's not coming from under the fuse box. It's coming from the 3 way coolant valve. When it fails, you'll get a check engine light
     
  4. wooha2000

    wooha2000 Junior Member

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    From your comment, are you saying the valve in this state is not an issue until I have a check engine light?
     
  5. edthefox5

    edthefox5 Senior Member

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    yes thats what he's saying.
     
  6. wooha2000

    wooha2000 Junior Member

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    Thanks... may I ask why is the value doing this to begin with? Is it suppose to do this in this manner?
     
  7. audiodave

    audiodave Active Member

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    It's not suppose to sound like that no. You can change it before the check engine light. How's your coolant look or when's last it was changed?

    Posted via the PriusChat mobile app.
     
  8. exstudent

    exstudent Senior Member

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    The valve is trying to get into the correct position. Since it can NOT, you are hearing that sound. If the valve was working correctly, you would hear nothing.

    You should get the valve replaced soon b/c something else could cause the CEL to get triggered, but you would never know, b/c the CEL is currently on due to the 3-way coolant control valve.

    Read this post to see if replacing the valve is something you can DIY. P1121 - Coolant Control Valve Replacement (with pics) | PriusChat

    Also, if you need cabin heat, a functioning 3-way valve is needed. The valve will direct HOT engine coolant to the cabin heater core. If the valve is in the wrong position, you won't have heat.
     
  9. wooha2000

    wooha2000 Junior Member

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    Thanks ... I had full maintenance done on the vehicle last year. and coolant levels are good. Thanks
     
  10. wooha2000

    wooha2000 Junior Member

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    Thanks.. I think I will get it changed.
     
  11. audiodave

    audiodave Active Member

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    Not about levels, condition and age of coolant.

    Posted via the PriusChat mobile app.
     
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