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Prius C Traction Battery please help i am out of ideas

Discussion in 'Prius c Main Forum' started by Javierz0509, Dec 18, 2017.

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  1. fotomoto

    fotomoto Senior Member

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    We've already seen reports here of a few Prius C batteries failing. The first one I recall was also a delivery driver from like Az or southern California (both hot like Miami) who had a lot of miles and was well past the 150k mile warranty. I believe he found and installed a used pack from another 2013.
     
    #21 fotomoto, Dec 19, 2017
  2. fotomoto

    fotomoto Senior Member

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    This is first evidence I've seen of an auto parts store reader actually seeing a hybrid specific code. Hopefully this good news for hybrid owners if they are using more capable code readers now.
     
    #22 fotomoto, Dec 19, 2017
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  3. Sam Spade

    Sam Spade Senior Member

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    12.5 is NOT a good charging voltage.
    Since the resting voltage of a fully charged AGM runs around 12.8, that indicates a slight discharge.
    If that reading was taken when the car was actually ON and ready to drive......then you have a charging system problem.
     
    #23 Sam Spade, Dec 19, 2017
  4. TMR-JWAP

    TMR-JWAP Senior Member

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    Toyo Kings Used Auto Parts in Opa Locka (about 5 miles from you?) shows as having a 2014 Prius C battery available. 29k miles.

    1-305-688-6200 No price listed but may be worth checking out.
     
    #24 TMR-JWAP, Dec 19, 2017
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  5. Prodigyplace

    Prodigyplace Senior Member

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    Thanks.
    I meant to tag you, but could not remember your username. :(
     
    #25 Prodigyplace, Dec 19, 2017
  6. jerrymildred

    jerrymildred Senior Member

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    Nope. 8 years or 100,000 miles.
     
    #26 jerrymildred, Dec 19, 2017
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  7. bisco

    bisco cookie crumbler

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    how are the mpg's?
     
    #27 bisco, Dec 19, 2017
  8. Javierz0509

    Javierz0509 Member

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    High 55 to 65mpg

    And here are the voltage of the individual module.
     

    Attached Files:

    #28 Javierz0509, Dec 19, 2017
  9. Javierz0509

    Javierz0509 Member

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    Thank you I will call tomorrow and ask them how much is that battery
     
    #29 Javierz0509, Dec 19, 2017
  10. fotomoto

    fotomoto Senior Member

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    Your voltages aren't horrible but wait for a professional opinion on that. You might also look into grid charging and see if that could be right for you and your situation.
     
    #30 fotomoto, Dec 19, 2017
    Last edited: Dec 19, 2017
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  11. Javierz0509

    Javierz0509 Member

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    Well since I have the battery out I am cleaning out the terminals or whatever these things are call but they seem really dirty. Guys I thank you for the advice and I appreciate it more if anything
     

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    #31 Javierz0509, Dec 19, 2017
  12. TMR-JWAP

    TMR-JWAP Senior Member

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    Cleaning them is a good step. Although I use muriatic acid, the green Scotchbrite pads can sometimes work miracles, and are much easier to dispose of....... Loosening and re-torquing all the fasteners won't hurt either. I would also disconnect and inspect all the electrical plugs. Just be sure to fully "click" them back together afterward.
     
    #32 TMR-JWAP, Dec 19, 2017
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  13. Javierz0509

    Javierz0509 Member

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    Here is what they look like now.
     

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    #33 Javierz0509, Dec 19, 2017
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  14. TMR-JWAP

    TMR-JWAP Senior Member

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    Looking better!! Don't forget, recommended torque value for those module fasteners is 48 INCH pounds. (3 ft lbs)
     
    #34 TMR-JWAP, Dec 19, 2017
  15. Javierz0509

    Javierz0509 Member

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    By the way those terminal plates are the ones that have the wires that go into the battery computer on the side, those plates were the most dirty.
     
    #35 Javierz0509, Dec 19, 2017
    Last edited: Dec 20, 2017
  16. jerrymildred

    jerrymildred Senior Member

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    Good job! Those ones you just mentioned are the ones I think cause some people to replace batteries that aren't necessarily bad.
     
    #36 jerrymildred, Dec 20, 2017
    Last edited: Dec 20, 2017
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  17. Javierz0509

    Javierz0509 Member

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    I hope that's my case, well I put everything back together and the car turns on fine no error, but since the error message comes on randomly I guess now I have to drive it and see.
     
    #37 Javierz0509, Dec 20, 2017
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  18. Prodigyplace

    Prodigyplace Senior Member

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    Did you torque the connections to the proper spec? Some people who just guessed at the torque have had issues later.
     
    #38 Prodigyplace, Dec 20, 2017
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  19. Javierz0509

    Javierz0509 Member

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    i did yeah @TMR-JWAP gave the torque spec.
     
    #39 Javierz0509, Dec 20, 2017
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  20. ericbecky

    ericbecky Hybrid Battery Hero

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    While you are in there check for corrosion on the pins of the voltage sensing wire connector at the ECU.
    As well as at the crimp portions of the ring terminals.
     
    #40 ericbecky, Dec 20, 2017
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