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Charging 2005 Prius 12V Dead Battery, How to Dismiss the Alarm?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Maisie, Feb 6, 2020.

  1. Maisie

    Maisie New Member

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    I know there has to be a key fob sequence or some other ritual for dismissing the alarm which goes off when the battery springs back to life. Advise please and thanks!
     
    #1 Maisie, Feb 6, 2020
  2. dolj

    dolj Senior Member

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    Put the fob in the slot and start the car.
     
    #2 dolj, Feb 7, 2020
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  3. ChapmanF

    ChapmanF Senior Member

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    Just pushing the unlock button on the fob has always worked for me.
     
    #3 ChapmanF, Feb 7, 2020
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  4. Maisie

    Maisie New Member

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    ----USA----
    Thanks for the responses ! I just went through the steps again and the alarm/horn goes off right when I plug in the charger on 12V. No responses to fob commands. I flipped it back to 6V, waited about 20 minutes and then back to 12V and this time alarm/horn plus instrument panel lights flash and fob plugged in, and it responds to all but starting. The commands on fob alone were not successful.

    I'm pretty sure it needs a new battery, and I have been vigilant about not letting it stay in auxiliary mode. Alas, someone who recently drove my prius may not have been so careful, and it was totally dead when I later tried to start it.
     
    #4 Maisie, Feb 7, 2020
  5. Patrick Wong

    Patrick Wong DIY Enthusiast

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    I suggest you disconnect the 12V battery before you charge it since the battery is in such poor condition. Then you don’t have to worry about the alarm. Or just face the fact you need a new battery and buy it now.
     
    #5 Patrick Wong, Feb 7, 2020
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  6. Maisie

    Maisie New Member

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    Thanks Patrick! Now is the time I think.
     
    #6 Maisie, Feb 7, 2020
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