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

Check Hybrid - 12V bad and replaced

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by RichInWatts, Dec 11, 2018.

  1. RichInWatts

    RichInWatts New Member

    Joined:
    Dec 11, 2018
    3
    2
    0
    Location:
    California
    Vehicle:
    2011 Prius
    Model:
    N/A
    Greetings!

    I have had CHECK HYBRID SYSTEM on my 2011 Prius (157,000 - original owner) for a few weeks, unable to start the car.

    I picked up an OBDII and Torque and discovered my 12V was at about 8V. I removed the battery and my voltmeter confirmed 8V.

    The rest of the battery packs report 15.5V.

    This morning I replaced the 12V and it now reads 12V+ in Torque.

    I have powered off and on over and over (with pedal/without) but cannot clear my Hybrid fault.

    Anything else I can check with Torque to pinpoint where my problem is?

    Thanks!
     
    #1 RichInWatts, Dec 11, 2018
  2. tankyuong

    tankyuong Senior Member

    Joined:
    Nov 9, 2012
    1,555
    660
    0
    Location:
    Central MO
    Vehicle:
    2012 Prius c
    Model:
    II
    You need techstream to read the real codes
     
    #2 tankyuong, Dec 12, 2018
    jerrymildred and Raytheeagle like this.
  3. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,703
    48,947
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    welcome!
    clean the battery cooling fan and intake grille

    a new, fully charged 12v should read 13 volts stone cold
     
    #3 bisco, Dec 12, 2018
  4. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,674
    38,219
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Can you display any codes with Torque? With warnings on the dash, there for sure will be codes, and even generic readers should be able to see at least some of them. Post what you can.

    If you're stumped, a dealership visit and $75~100 should shed some light. Or we can continue to guess here.
     
    #4 Mendel Leisk, Dec 12, 2018
  5. sam spade 2

    sam spade 2 Senior Member

    Joined:
    Mar 31, 2018
    7,035
    2,782
    0
    Location:
    USA
    Vehicle:
    2017 Prius c
    Model:
    Four
    Not necessarily.
    Anything above 12.6 is considered "good" and after the "surface" charge dissipates, 12.8 or 12.9 is a more common reading.
     
    #5 sam spade 2, Dec 12, 2018
    Mendel Leisk likes this.
  6. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,674
    38,219
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Yeah my brand new Optima Yellow Top, after an initial charging and a day or two driving, first thing in the morning would read around 12.8.
     
    #6 Mendel Leisk, Dec 12, 2018
    bisco likes this.
  7. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,703
    48,947
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    i have read that optima chemistry is different?
     
    #7 bisco, Dec 12, 2018
  8. RichInWatts

    RichInWatts New Member

    Joined:
    Dec 11, 2018
    3
    2
    0
    Location:
    California
    Vehicle:
    2011 Prius
    Model:
    N/A

    If you are describing the "Fault Codes" that take a minute or so to load it always comes up empty.

    I don't plan on fixing this car myself. Although I have experience with repairing industrial equipment (30+ years) I am the one guy on the crew who wasn't a car junkie. I know next-to-nothing about engines and where to be cautious. The 12V battery was pretty much the extent of my car knowledge.

    I'm not going to lie...I was hoping somebody had a magic-reset sequence and hoped the 12V was the issue.

    It makes sense that it's something else and the 12V was just a symptom.

    The car does not currently run (ICE never fires up) so I'll need to have it towed to be serviced but I was hoping to at least prove it's not the battery pack so I don't get taken for a ride. I don't know any local reputable repair shops from personal experience so will likely take it to the Toyota Dealership where I have had every scheduled service done.

    All of my modules come up 15.5 and I am hoping that's a good sign.

    I sure appreciate everyone's attempts to help.
     
    #8 RichInWatts, Dec 13, 2018
    Mendel Leisk likes this.
  9. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,703
    48,947
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    how many miles on her?

    where all in cali are you? there's some great indy's out there
     
    #9 bisco, Dec 13, 2018
  10. RichInWatts

    RichInWatts New Member

    Joined:
    Dec 11, 2018
    3
    2
    0
    Location:
    California
    Vehicle:
    2011 Prius
    Model:
    N/A

    157,000. :D

    Central Coast. Watsonville, CA to be specific.
     
    #10 RichInWatts, Dec 14, 2018
    bisco likes this.
  11. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,703
    48,947
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    are you too far from luscious garage?
     
    #11 bisco, Dec 14, 2018
    Raytheeagle likes this.
  12. Raytheeagle

    Raytheeagle Senior Member

    Joined:
    Jul 1, 2016
    11,251
    15,476
    0
    Location:
    Bay Area, California
    Vehicle:
    2019 Prius Prime
    Model:
    Prime Plus
    He’s in strawberry country and about 100 miles away ;).

    @James Powers is close by and might have a suggestion :).

    When the message is displayed, how does tour Prius drive?

    Good luck and keep us posted (y).
     
    #12 Raytheeagle, Dec 14, 2018
    kc5dlo likes this.
(You must log in or sign up to post here.)