1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Battery removal, 12v

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by mikefocke, Oct 25, 2014.

  1. mikefocke

    mikefocke Prius v Three 2012, Avalon 2011

    Joined:
    Nov 3, 2012
    3,638
    1,626
    0
    Location:
    Sanford, NC
    Vehicle:
    Other Hybrid
    Model:
    Limited
    Are there any special tricks or steps to removing the 12v battery in a v? I searched the owner's manual and didn't see any. (Have swapped dozens in other cars, no need to disconnect, just lift out so I can get underneath it.)

    Background:

    Taking trash to the dump after my wife put 2 bushels of apple peelings in a trash bag and they sat for 2 weeks. Must have overflowed because there was 3/4" of apple juice in the Weathertech trunk mat and it overflowed the rear lip and into the spare tire wheel, into the original trunk mats, etc. Those are now cleaned, deodorized etc. Still a slight smell so I figure the logical place is the battery well.

    I was surprised at the lack of acoustical sound deadening material in the wheel well under the spare.
    any special tricks or requirements to remove the 12v battery?
     
    #1 mikefocke, Oct 25, 2014
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,747
    48,962
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    nope. hook up a 12v source under the hood if you want to keep your memory's.
     
    #2 bisco, Oct 25, 2014
  3. mikefocke

    mikefocke Prius v Three 2012, Avalon 2011

    Joined:
    Nov 3, 2012
    3,638
    1,626
    0
    Location:
    Sanford, NC
    Vehicle:
    Other Hybrid
    Model:
    Limited
    What sorts of things do I lose if I "lose memory" by just disconnecting the battery? Settings for backup and seatbelts and such? Bluetooth pairings? GPS memory?
     
    #3 mikefocke, Oct 25, 2014
  4. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,747
    48,962
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    good question, there have been different reports, i'm not sure beyond radio presets, power windows, maybe trip info?
     
    #4 bisco, Oct 25, 2014
  5. Mike500

    Mike500 Senior Member

    Joined:
    Mar 1, 2012
    2,593
    763
    0
    Vehicle:
    2012 Prius v wagon
    Model:
    Two
    I disconnected the battery on my Prius"v" for 20 minutes.

    None of the settings were changed except for the clock, which was easily reset.

    It appears that most of the settings of the ecu are programmed to EPROMs, and thus, non volatile, until they are "erased" or reprogrammed.
     
    #5 Mike500, Oct 25, 2014
    Jim Starkovich and bisco like this.
  6. Easy Rider 2

    Easy Rider 2 Senior Member

    Joined:
    Aug 5, 2014
    1,584
    257
    0
    Location:
    Ocala, FL
    Vehicle:
    2013 Prius c
    Model:
    Three
    IF you end up needing to disconnect the cables to get enough slack,
    disconnect and isolate (insulate) the negative cable first.
    That way if you accidentally contact a tool from + post to chassis, no harm will be done.
    Re-connect the negative wire last.
     
    #6 Easy Rider 2, Oct 26, 2014
  7. jzchen

    jzchen Newbie!

    Joined:
    Apr 9, 2012
    3,296
    1,006
    0
    Location:
    Arcadia, CA
    Vehicle:
    2012 Prius v wagon
    Model:
    Five
    With the ATP there are two initializations that need to be done. I am not home to check, but I remember one being to turn wheel from lock to lock.

    MT2L03 ?
     
    #7 jzchen, Nov 24, 2014
(You must log in or sign up to post here.)