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

Entering Car With 12v battery disconnected

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Mauiman, Jul 3, 2019.

  1. Mauiman

    Mauiman Junior Member

    Joined:
    Mar 19, 2011
    43
    7
    0
    Location:
    USA
    Vehicle:
    2011 Prius
    Model:
    Four
    2011 Prius IV -- going on several months absence and will disconnect the 12V battery during the trip. It is a real pain to have to crawl over the seats to hook up the battery again. Question: If I leave the car unlocked in the first place when disconnecting the 12V battery, will I be able to open the rear hatch upon my return since it was not locked?
     
  2. JC91006

    JC91006 Senior Member

    Joined:
    Nov 10, 2013
    16,525
    8,428
    0
    Location:
    Los Angeles, CA
    Vehicle:
    2008 Prius
    Model:
    II
    No

    You can leave the hatch ajar with a towel covering the latch.

    Or you'll need to power the car upon your return using the jump start points in the engine compartment, that'll power the car and enable you to open the hatch
     
    Mendel Leisk likes this.
  3. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    110,133
    50,050
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    if you don't have a 12v source, take the battery out so you can power the jump point with it,

    but easier just to use another cars battery with cables, if you can get to the front of the car where it's parked
     
  4. Mauiman

    Mauiman Junior Member

    Joined:
    Mar 19, 2011
    43
    7
    0
    Location:
    USA
    Vehicle:
    2011 Prius
    Model:
    Four
    I had not thought it possible to power the car by jump starting it with the 12V battery disconnected. I wanted to hook a battery tender/float charger up to the jump start points in the engine compartment to keep the battery charged. But, the Toyota dealer service department told me that wouldn't work. So, I didn't think about jump starting it to get the rear hatch open. Hmmm. I'm hesitant to leave the hatch ajar -- I live in the tropics and I'd imagine geckos, ants, roaches, maybe centipedes would find their way inside the car.
     
  5. Mauiman

    Mauiman Junior Member

    Joined:
    Mar 19, 2011
    43
    7
    0
    Location:
    USA
    Vehicle:
    2011 Prius
    Model:
    Four
    I can always back the car into the carport so the front of the car is accessible. Why would I need to have a mechanic or dealer check the trouble codes after re-hooking up the 12v battery?
     
    bisco likes this.
  6. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
    56,675
    39,222
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    I always charge via the front jump point, well actually via a quick connect wired in right there. It's hooked up to a CTEK 4.3 charger thus more oft than not.
     
  7. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    110,133
    50,050
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    who said anything about trouble codes?
     
    Grit likes this.
  8. Grit

    Grit Senior Member

    Joined:
    Aug 22, 2017
    6,174
    4,078
    1
    Location:
    Wilkes Land
    Vehicle:
    2012 Prius
    Model:
    Four
    It was probably said by aliens; they take engine oil from motorcycles, and now erroneous telepathy. Can't wait for what's next.
     
    bisco likes this.
  9. Mauiman

    Mauiman Junior Member

    Joined:
    Mar 19, 2011
    43
    7
    0
    Location:
    USA
    Vehicle:
    2011 Prius
    Model:
    Four
    Well, I thought you did, bisco. On each of your posts, immediately below what you wrote is the text "...have the trouble codes checked after checking the 12v health..." It is text that is only in light gray, not sharp black text. It's not important -- sorry to bring it up. Just curious where it comes from and how it got in your message.
     
    bisco likes this.
  10. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    110,133
    50,050
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    sorry to confuse, those are just little things you can automatically add at the bottom of each post.

    if you look at others, you will see similar printing with different information/sayings/quotes or whatever.
    if you click on your avatar at the top of the page, you get a dropdown meny. 'signature' is the one that adds to the bottom of your posts.

    now you've got me thinking i should remove them, in order not to confuse :)
     
  11. Mauiman

    Mauiman Junior Member

    Joined:
    Mar 19, 2011
    43
    7
    0
    Location:
    USA
    Vehicle:
    2011 Prius
    Model:
    Four
    Thanks for the clarification...now that I know, it won't confuse me again.
    When I disconnect the 12v battery, what all will need to be reset when I hook it back up again? radio station presets, for sure, but what else?
     
  12. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    110,133
    50,050
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    sometimes the window switches don't work properly. there is a method for resetting, i think it's hold the switch all the way down, and all the way up.
     
    Mendel Leisk likes this.
  13. Grit

    Grit Senior Member

    Joined:
    Aug 22, 2017
    6,174
    4,078
    1
    Location:
    Wilkes Land
    Vehicle:
    2012 Prius
    Model:
    Four
    (n)
     
  14. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
    56,675
    39,222
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    And then continue to hold up for at least two seconds more.
     
    bisco likes this.
  15. CR94

    CR94 Senior Member

    Joined:
    Dec 2, 2014
    2,642
    1,140
    0
    Location:
    Northwestern S.C.
    Vehicle:
    2011 Prius
    Model:
    Two
    Trip A & B data will be lost, so you might want to take notes before disconnecting the battery, if you care.
     
    bisco likes this.
  16. Mauiman

    Mauiman Junior Member

    Joined:
    Mar 19, 2011
    43
    7
    0
    Location:
    USA
    Vehicle:
    2011 Prius
    Model:
    Four
    I would not have thought about the power window switches needing resetting. As for the trip A&B, I reset them to zero every time I get gas in the car. So, no loss for me on that account. Thanks for the idea though.
     
  17. Grit

    Grit Senior Member

    Joined:
    Aug 22, 2017
    6,174
    4,078
    1
    Location:
    Wilkes Land
    Vehicle:
    2012 Prius
    Model:
    Four
    Your log of last 6 months of mpgs goes to zero also. Mine goes back to 2011 when 12v gets the disconnect so I never the date.
     
    Raytheeagle and bisco like this.
  18. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    110,133
    50,050
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    you never the date? i always the date :cool:
     
    RMB, CR94, Grit and 2 others like this.
  19. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
    56,675
    39,222
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Good wine?
     
    Grit, Raytheeagle and bisco like this.
  20. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    110,133
    50,050
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    fabulous:p
     
    Grit, Raytheeagle and Mendel Leisk like this.