Why did my battery die?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Taxi/Limo, Nov 12, 2016.

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  1. Taxi/Limo

    Taxi/Limo Active Member

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    Hello All
    I decided to sleep a little in my Prius on a warm day
    I turned turned the car on to engine mode turned on the air con and the radio about a half hour my battery died
    I thought when you turn the car fully on the engine kicks in when battery power is low ?



    Nexus 6 ?
     
    #1 Taxi/Limo, Nov 12, 2016
  2. jadziasman

    jadziasman Prius owner emeritus

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    It should do that. Are you sure you did? I've left my Prius on READY just as you have and it has worked fine for me.
    Are you saying that the 12V aux battery was the one that died?

    How did you know if it was about 30 minutes if you were asleep?
     
    #2 jadziasman, Nov 12, 2016
  3. ILuvMyPriusToo

    ILuvMyPriusToo Senior Member

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    Sure you were in READY?
     
    #3 ILuvMyPriusToo, Nov 12, 2016
  4. Taxi/Limo

    Taxi/Limo Active Member

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    It could have have asleep longer I think it was the 12 volt batt. I gave it a jump and it started promptly
    I jumped it from the convenient jump terminal under the hood

    Nexus 6 ?
     
    #4 Taxi/Limo, Nov 12, 2016
  5. bisco

    bisco cookie crumbler

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    probably put it in acc.
     
    #5 bisco, Nov 12, 2016
  6. ILuvMyPriusToo

    ILuvMyPriusToo Senior Member

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    Not A Climate Controlled . . . :sleep:
     
    #6 ILuvMyPriusToo, Nov 12, 2016
  7. Taxi/Limo

    Taxi/Limo Active Member

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    Air conditioning does not work In acc mode

    Nexus 6 ?
     
    #7 Taxi/Limo, Nov 12, 2016
  8. fuzzy1

    fuzzy1 Senior Member

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    I hope you had it Ready in Park, not Neutral.
     
    #8 fuzzy1, Nov 13, 2016
  9. Taxi/Limo

    Taxi/Limo Active Member

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    It was in park

    Nexus 6 ?
     
    #9 Taxi/Limo, Nov 13, 2016
  10. fuzzy1

    fuzzy1 Senior Member

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    When my car is in ACC mode, the ventilation fan and A/C indicator light do come on. The actual A/C compressor should not come on, but my quick test moments ago didn't wait for that, it is too cold here to check that anyway.

    Make sure the 'READY' light is actually on, and/or test that the car will go really into Drive, even if you move the car only inches as part of the test. Then put it back into Park.
     
    #10 fuzzy1, Nov 13, 2016
  11. Taxi/Limo

    Taxi/Limo Active Member

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    With Acc on the ventilator fan and air condition light do not come on I can do the ready test to see if that splains it

    Nexus 6 ?
     
    #11 Taxi/Limo, Nov 13, 2016
  12. Taxi/Limo

    Taxi/Limo Active Member

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    In my 2010 Prius

    Nexus 6 ?
     
    #12 Taxi/Limo, Nov 13, 2016
  13. Taxi/Limo

    Taxi/Limo Active Member

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    Jadsiasman. You were right the car was not in the Ready mode thanks for your patience

    Note my 2010 Prius air conditioning does not work nor any component of it does not work In ACC mode

    Nexus 6 ?
     
    #13 Taxi/Limo, Nov 13, 2016
  14. ILuvMyPriusToo

    ILuvMyPriusToo Senior Member

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    So in what mode does the AC work without the engine cycling on?
     
    #14 ILuvMyPriusToo, Nov 13, 2016
  15. fotomoto

    fotomoto Senior Member

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    None. In ACC mode the fan works via the 12v battery and if the evaporator core is still cold, chilled air will still come out the vents for awhile and the length of time it stays cool will depend on local conditions (heat & humidity).

    The OP had a failed start. These are usually caused by rushing the start procedure and letting off the brake too quickly.
     
    #15 fotomoto, Nov 13, 2016
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  16. fuzzy1

    fuzzy1 Senior Member

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    Perhaps I misstated, or was unclear.

    Foot off brake, if I press the Power button once, it goes into basic ACC mode. The dashboard remains mostly dark, and the climate control is dead.

    Foot still off brake, if I press Power again, the car goes into another mode where the whole dashboard lights up, and the climate controls go live. Ventilation fan turns on, A/C indicator light can be turned on. But the ignition won't go Ready, the engine won't fire up, neither battery will charge, and I don't believe the A/C compressor can run. This is also the same condition as the 'failed start' fotomoto mentions, when the foot brake is not applied properly during starting.
     
    #16 fuzzy1, Nov 13, 2016
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  17. bisco

    bisco cookie crumbler

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    what is the purpose of the second mode?
     
    #17 bisco, Nov 13, 2016
  18. Taxi/Limo

    Taxi/Limo Active Member

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    I don't consider the second mode an Acc mode but I see what you mean

    Nexus 6 ?
     
    #18 Taxi/Limo, Nov 14, 2016
  19. Taxi/Limo

    Taxi/Limo Active Member

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    The air-conditioning works in two and three mode in three mode the engine cycles on and off

    Nexus 6 ?
     
    #19 Taxi/Limo, Nov 14, 2016
  20. bisco

    bisco cookie crumbler

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    wow, a mode that let's you use a/c but doesn't run the ice to recharge the battery? does it give you a warning on the screen?
     
    #20 bisco, Nov 14, 2016
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