2012 won’t power on without jump start

Discussion in 'Gen 3 Prius Technical Discussion' started by gptoyz, Jan 13, 2020.

  1. gptoyz

    gptoyz Junior Member

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    Brand new true start 12v aux battery

    One car is jumped with a battery pack it has no problem starting and continuing to run. Once you power it off it will not start back. Checked 12v battery voltage at the terminals and read 12.4v.

    Pulled a p2610 code with a snap on scanner

    I have checked for loose terminals on the battery compartment everything is tight.

    I’m going to try and swap in my old battery see if the problems come back.

    No triable or exclamations or anything out of the ordinary so far.


    iPhone ?
     
  2. PriusCamper

    PriusCamper Senior Member

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    Hi... I spent the first 8 years of my life in your town of Los Altos... That is if it's the one in California.

    As for your error code, let's get the 12v battery issue solved first.

    Check all you connections, look for any signs of damage or things out of place, put a trickle charger on your 12v to give it a good charge. Then once that is done try this and let us know the results:

     
  3. Mendel Leisk

    Mendel Leisk 'Orrible Oracle

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    You might have bought a dud. 12.4 volts is not very good. Is purchase through a local dealership? I would complain, and have them test it's Cold Cranking Amps with an electronic load tester. You can DIY the test with something like Solar BA9.

    Nowadays nobody should be sold a battery without an electronic load test at time of purchase, it eliminates the fiinger pointing.

    You might also have a higher than normal phantom load drawing the battery down: have you got any accessories plugged in all the time? Maybe something's not shutting down properly?

    You can test for this by disconnecting the negative lead, splicing your multimeter in series. Doing that I found around 16~20 milliamps, steady, with regular spikes to around 40. The spikes may have been the little security icon blinking on the dash, not sure.
     
  4. tvpierce

    tvpierce Senior Member

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    Where are you connecting the jump start battery pack?
     
  5. jerrymildred

    jerrymildred Senior Member

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    If the new battery was mishandles, there could be a broken/loose connection inside.
     
  6. Rebound

    Rebound Senior Member

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    Check the battery negative terminal cable. It should be solidly bolted to the car metal. Make sure it’s snug... not on the battery side but also on the car sheet metal.

    Otherwise, sounds like the battery is a dud.
     
    jerrymildred likes this.
  7. tvpierce

    tvpierce Senior Member

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    Again, are you connecting the jump pack at the battery, or at the access point under the hood?
     
  8. psusi

    psusi Junior Member

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    Yea, a fully charged battery with no load should be 13.0-13.2 volts. 12.4 is no good unless it's running the headlights.
     
  9. sam spade 2

    sam spade 2 Senior Member

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    It might be.......but it doesn't NEED to be.
    The nominal resting voltage for most AGM batteries is 12.8-12.9.
    More than that probably means that it was disconnected from a charging source in the last couple of hours......with no load.
     
    Grit likes this.
  10. psusi

    psusi Junior Member

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    Ahh, right... I was thinking the charge voltage. But even with the headlights on, it should be able to stay above 12 volts. If you run the headlights for a few minutes and the voltage drops below 11.5 ( and doesn't quickly come back up ) it's no bueno.
     
    sam spade 2 likes this.
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