12 volt battery

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by Costantino Volpe, Jan 18, 2018.

  1. Costantino Volpe

    Costantino Volpe Junior Member

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    Anyone know if there is a way to check the condition of the 12 Volt battery on a 2013 PIP? I've seen posts and You tube videos on how to do it on other years and makes but my car doesn't have the same buttons on the dash. I tried poking around all the different menus and screens but couldn't come up with anything. Can you even check your 12 volt on the 2013 PIP?

    Thanks
     
  2. Mendel Leisk

    Mendel Leisk Senior Member

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    Clore Automotive Solar BA5

    upload_2018-1-18_13-12-47.png
     
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  3. bisco

    bisco cookie crumbler

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    i use a $15. multimeter on the jump point under the hood. check it in the morning before touching anything in the car, including the drivers door.
    are you having any problems, or just curious?
     
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  4. padroo

    padroo Senior Member

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    Here is a video from Dorman on the 12 Volt battery. They say it has to put out a minimum of 11.5 Volts under load. Unloaded voltage readings are not the best way to determine battery capacity. The video does mention throwing a couple codes but the 11.5 Volts sounds good to me.



    It would be interesting if someone had an amprobe and actually measured current draw on Prius start up. This cold weather has been the death to a lot of Prius batteries since it is such a common question. A lot of Southern Prii have lead a sheltered life until this winter.
     
    #4 padroo, Jan 18, 2018
    Last edited: Jan 18, 2018
  5. CaliforniaBear

    CaliforniaBear Clearwater Blue Metallic

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    Prius PHV Manual, Section 6.1 page 618 gives values for state of charge.
    My measurements on my 2012 PiP
    April 2013 12.77 v
    January 2014 12.65 v
    May 2017 12.62 v
    January 2018 12.50 v
    While that is not a proper load test it implies somewhere above 50% capacity.
    I was thinking that if I had to leave it in a parking garage for a 2 week vacation
    it might be a good idea to replace this 5-year old battery. Battery-PriusPHVmanualPg613.jpg
     
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  6. drysider

    drysider Active Member

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    If it is original equipment, I suggest you change it. It is a failure waiting to happen.
     
  7. CaliforniaBear

    CaliforniaBear Clearwater Blue Metallic

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    No problems of any kind.
     
  8. bisco

    bisco cookie crumbler

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    curious then?
     
  9. CaliforniaBear

    CaliforniaBear Clearwater Blue Metallic

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    I like keeping track of things, mileage, kWh to charge the battery, solar panel output for the house, etc.
     
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  10. bisco

    bisco cookie crumbler

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    same here. i'll be checking mine on sunday before leaving it for 7 weeks.
     
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