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Discussion in 'Gen 3 Prius Main Forum' started by analoggirl, Aug 21, 2024.

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  1. analoggirl

    analoggirl Member

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    2011 Prius. The main hybrid battery has been changed last year, as well as the ABS system.12v 4 years ago.

    The car won't start. The only thing that shows is the door open sign, when I open the engine there's a little whiny sound on the right side. What's going on?

    Help I'm stuck after surgery
     
    #1 analoggirl, Aug 21, 2024
  2. Brian1954

    Brian1954 Senior Member

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    Do the interior lights work.

    I am guessing that your 12v battery is low.
     
    #2 Brian1954, Aug 21, 2024
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  3. Mr. F

    Mr. F Active Member

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    Yep, I'd check the 12V battery. That little whiny sound is the brake booster pump trying (and probably failing) to build up brake fluid pressure at startup. With a healthy battery that sound would have been a much louder buzz.
     
    #3 Mr. F, Aug 21, 2024
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  4. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    Do you have a digital multimeter?
     
    #4 Mendel Leisk, Aug 21, 2024
  5. 3PriusMike

    3PriusMike Prius owner since 2000, Tesla M3 2018

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    An analog one would work as well. look at her name :)

    Mike
     
    #5 3PriusMike, Aug 21, 2024
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  6. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    Nope, digital or go home.
     
    #6 Mendel Leisk, Aug 21, 2024
  7. analoggirl

    analoggirl Member

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    a friend is here and trying to jump the 12 V, and now the red light for the door doesn't even come on, the whining has stopped, there's no noise nothing. And the brakes are really hard to press down.
     
    #7 analoggirl, Aug 21, 2024
  8. analoggirl

    analoggirl Member

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    [a friend is here and trying to jump the 12 V, and now the red light for the door doesn't even come on, the whining has stopped, there's no noise nothing. And the brakes are really hard to press down.
     
    #8 analoggirl, Aug 21, 2024
  9. analoggirl

    analoggirl Member

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    It's not working, I'm looking to see if I have something else
     
    #9 analoggirl, Aug 21, 2024
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  10. analoggirl

    analoggirl Member

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    We're going to get a new multimeter, what should be looking at after we get it?



    we, what should we look for?
     
    #10 analoggirl, Aug 21, 2024
  11. analoggirl

    analoggirl Member

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    Be out?
     
    #11 analoggirl, Aug 21, 2024
  12. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    Just check the voltage on the battery. A healthy battery should be showing at least 12.6 volts. If it's something like 10~11 volts, it's pretty much toast.
     
    #12 Mendel Leisk, Aug 21, 2024
  13. analoggirl

    analoggirl Member

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    Thanks. The fact that the brake is insanely hard to press, would that indicate any brake issue? or is that the 12 V still?
     
    #13 analoggirl, Aug 21, 2024
  14. analoggirl

    analoggirl Member

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    What's the best battery to get to replace? I looked at some videos, and I think I can get my son to change it, it looks pretty simple
     
    #14 analoggirl, Aug 21, 2024
  15. analoggirl

    analoggirl Member

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    #15 analoggirl, Aug 21, 2024
  16. Brian1954

    Brian1954 Senior Member

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    A battery from Toyota dealership is a good choice. They last a long time.

    The cheapest that I have found is from Walmart, about $180. Look online for stock a Walmart near you.
     
    #16 Brian1954, Aug 21, 2024
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  17. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

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    I don't know if you'll find your size there, but Walmart is a great choice for batteries just because they sell a bunch, so you are likely to get a fresh one instead of something that's been on the shelf a year already.
     
    #17 Leadfoot J. McCoalroller, Aug 21, 2024
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  18. ChapmanF

    ChapmanF Senior Member

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    What normally makes the brake not insanely hard to press is an accumulator of brake fluid used to assist you, kept filled to high pressure by a 12-volt electric pump. If there hasn't been power to run that pump, the assist pressure gets used up and, without it, the brakes are insanely hard to press.
     
    #18 ChapmanF, Aug 21, 2024
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  19. fuzzy1

    fuzzy1 Senior Member

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    I'd still try charging the 12V battery first, before moving to replace it.
     
    #19 fuzzy1, Aug 21, 2024
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  20. analoggirl

    analoggirl Member

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    it wouldn't charge, I ended up replacing it with a Toyota battery
     
    #20 analoggirl, Aug 29, 2024
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