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Brake Pedals, Starting Process, Hybrid Display issues...12v battery?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by richmarcia, Aug 17, 2017.

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  1. richmarcia

    richmarcia New Member

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    2010 Prius
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    ----USA----
    For the last two weeks the car has had issues starting immediately after depressing the brake pedal. Often the brake pedal has difficulty being pressed. Often the hybrid display panel/clock area won't come online/is blank.

    Usually when it finally does start, and runs for 20 mins or so, if I try again there is no problem and the display panel lights up again. I think this indicates one of the batteries has charged up again, which leads me to believe the battery might be the root problem? The 2010 Prius has 100,400 miles on it. The batteries have never been changed.

    Thanks for any suggestions/help.

    Rich
     
    #1 richmarcia, Aug 17, 2017
  2. tankyuong

    tankyuong Senior Member

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    12v battery
     
    #2 tankyuong, Aug 17, 2017
  3. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    Yeah battery replacement is overdue. Just wondering too, if the problems persist after battery change: there's a switch on the brake that detects you're pushing the brake (necessary to start the car), maybe that needs adjustment?
     

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    #3 Mendel Leisk, Aug 17, 2017
  4. jerrymildred

    jerrymildred Senior Member

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    Indubitably!
     
    #4 jerrymildred, Aug 17, 2017
  5. bisco

    bisco cookie crumbler

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    there is a 12v battery to power up the computers, ($200. plus install) and a hybrid drive battery to start the engine, run some accessories and motivate the car. ($2,600. plus install) focus on the first buy testing the voltage.
    the second isn't likely the problem.
     
    #5 bisco, Aug 17, 2017
  6. FuelMiser

    FuelMiser Senior Member

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    The hard brake pedal may be related to the 12V in that it powers the vacuum pump you hear when you first open the door. It buzzes a few seconds to create vacuum for the power brake assist. But hard brake pedal alone should not affect powering the car on. It doesn't take much pedal depress to enable the power on sequence.
     
    #6 FuelMiser, Aug 17, 2017
  7. Dessy

    Dessy New Member

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    My 2013 toyota prius is having break issues. The pedal someones becomes hard/stiff when stepped on. When this happens, the breaking system on the dash board come on with two other light all yellow. Also the car would start making bleeping sound.

    Any advise on this please?
     
    #7 Dessy, Nov 14, 2024 at 2:39 PM
  8. Brian1954

    Brian1954 Senior Member

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    You have a serious brake problem. You need to use a scan tool to read the trouble codes or take it to someone who can read the trouble codes.
     
    #8 Brian1954, Nov 14, 2024 at 5:52 PM
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