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Won’t go into ready mode

Discussion in 'Gen 3 Prius Technical Discussion' started by Jason Beauchamp, Jun 23, 2021.

  1. Jason Beauchamp

    Jason Beauchamp New Member

    Joined:
    Oct 4, 2020
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    Location:
    Lancaster, KY
    Vehicle:
    2012 Prius
    Model:
    Four
    Just started having this issue, sometimes when I get in the car and push the power button it doesn’t go into ready mode, everything else comes on like when you push the button without applying the brake. I can turn it off and try again and still won’t go into ready. I can come back later and try it and it will come right on like normal. I have checked the 12v battery voltage when it did this and it was about 10.4, not sure why the voltage was that low either it has a fairly new dealer battery and seems to do this more often when I get in the car after work.
     
    #1 Jason Beauchamp, Jun 23, 2021
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    110,133
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    charge up the battery. if it won't hold 12.7v overnight, take it back for warranty replacement.

    another issue can be the brake light switch on the pedal, it might need adjustment.
     
    #2 bisco, Jun 23, 2021
    Jason Beauchamp likes this.
  3. rjparker

    rjparker Tu Humilde Sirviente

    Joined:
    Jun 6, 2008
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    Location:
    Texas Hill Country
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    Or check for parasitic draw while off. Should be 15-30ma. 90ma or more can cause issues. Some have had several hundred ma which will discharge a battery quick.
     
    #3 rjparker, Jun 23, 2021
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