Something crapped out. First battery failure?

Discussion in 'Prime Main Forum (2017-Current)' started by Mikhail Bond, Mar 3, 2020.

  1. Mikhail Bond

    Mikhail Bond Member

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    Hey all,

    just dropped my car off at Toyota.
    My car has 129k miles

    Went to work, plugged into a ChargePoint charger at the office(free)like every other day.

    only abnormal thing was yesterday’s charged mileage was only 22 after a full charge.

    get back in the car after work and I had 4 warnings on the dash.

    Will update as results come up tomorrow
     

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  2. pghyndman

    pghyndman Active Member

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    Could simply be a loose connector, wiring issue, or electronic component failure that is responsible. The LA Toyota shop techs should be able to quickly sort it out.
     
  3. bisco

    bisco cookie crumbler

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    low 12v?
     
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  4. Mikhail Bond

    Mikhail Bond Member

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    12V battery is pretty new. Also i don't think the Engine would have started if this was the case.
    basically the engine would start and then all the warning would pour out during hybrid health check.

    Preliminary report before i left said something along the lines of BMS failure unable to resolve, battery system inspection required.
    they are currently ripping the rear apart and gave me a courtesy rental.
     
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  5. Salamander_King

    Salamander_King Senior Member

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    At 129K miles, the traction battery should be still under warranty in CA. I hope the dealer can fix it free for you. Let us know how it goes.
     
  6. Mark57

    Mark57 2021 Tesla Model 3 LR AWD

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    When my 12V battery on my 2010 went and stayed below a certain voltage, I got all kinds of strange errors like you are seeing over several days. Yes, it would start but that didn't last very long before it finally crapped out. It took me a while to figure out it was the 12V battery after dumping and reading codes. A new 12V battery fixed it.

    Depending on how often and how far you drive or don't drive can still draw the battery down over time. If your daily drives are not far enough to recharge what's used, the 12V battery can draw down over time even if you drive it every day. This can be quickened if you have a lot of stuff pulling off the 12V battery inside the vehicle. The 12V battery mostly gets a trickle charge while driving so length of time per trip is a big factor. Lots of short trips can draw it down over time unless you have longer trips sprinkled in to build it back up.

    I put my Schumacher SC-10030A on all three of our Toyotas every 6-7 weeks just to check the battery condition. Results can be surprising.

    I hope it's as simple as the battery. Good luck.
     
  7. Mikhail Bond

    Mikhail Bond Member

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    update**

    I received this message from Toyota in Irvine, CA
    HELLO MIKHAIL, THE PRIUS HAS A HYBRID /EV BATTERY SENSOR A SIGNAL BIAS LEVEL OUT OF RANGE/ZERO ADJUSTMENT FAILURE, I HAVE TO GIVE YOU A REVISED ESTIMATE TO CHECK INTERNAL JUNCTION BLOCK 2 FOR POSSIBLE ELECTRICAL DAMAGE THE ESTIMATE IS $389.00 TO PROCEED WITH DIAGNOSTICS, WE HAVE CONTACTED TOYOTA TECHNICAL ALSO, LET ME KNOW IF OKAY TO PROCEED. THANKS
     
  8. bisco

    bisco cookie crumbler

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  9. Mikhail Bond

    Mikhail Bond Member

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    I'm just wondering what causes this damage?
    was it the Chargepoint charger?
     
  10. Mikhail Bond

    Mikhail Bond Member

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    You guys won’t believe this.

    I had a unplugged, 12 inch subwoofer that I picked up from my friend and it was in the trunk. This apparently caused the malfunction in the HV battery system and the only way to clear it was to do a complete system reset which required something out of the scope of their usual tech stream software.

    still cost me the amount above..
    Note to self. Do not keep anything magnetic in the trunk
     
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  11. Gokhan

    Gokhan Active Member

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    Hmm, I wonder if the complete system reset amounts to disconnecting and reconnecting the negative terminal of the 12 V battery. This is what I would have done before I took the car to the dealer and paid $$$.
     
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  12. bisco

    bisco cookie crumbler

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    wow, that is really unusual
     
  13. Mikhail Bond

    Mikhail Bond Member

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    Was kind of stuck At a university parking lot with no tools and a car that has a systemic problem that id had never encountered before.

    See attached doc
     

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  14. Mikhail Bond

    Mikhail Bond Member

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    I had Techstream and my connector but when I reset everything it changed nothing.
     
  15. Gokhan

    Gokhan Active Member

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    Yeah, I bet disconnecting and reconnecting the negative terminal of the 12 V battery would have solved the problem. I need to keep a socket set handy in my car myself.
     
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  16. Mikhail Bond

    Mikhail Bond Member

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    Subwoofer in question
     

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  17. Gokhan

    Gokhan Active Member

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    That produces a constant but large magnetic field for sure, albeit short range.

    I wonder what it interfered with. Normally it shouldn't be a problem, but perhaps it interfered with a sensor somehow.
     
  18. Mikhail Bond

    Mikhail Bond Member

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    They said it affected the current sensor.
     
  19. Gokhan

    Gokhan Active Member

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    That makes sense. The current sensor is probably a Hall effect sensor, which measures the magnetic field produced by the current. An external magnetic field would certainly alter the reading, such as giving nonzero results when there is no current.
     
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  20. pghyndman

    pghyndman Active Member

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    Possibly, but you could also muck things up, necessitating reprogramming or, minimally, re-flashing.

    WARNING: Below blurb is included ONLY for fellow pedants!

    I went nuts troubleshooting what should have been simple fix on our summer car (used very little during the off-season) which uses a communication network (CAN, Controller Area Network) and satellite modules (SAM, System Acquisition Module) to interface everything. IE: if a tail light fails, the system senses and reports it, informs you of the malfunction, and re-allocates another lamp in the cluster to serve the purpose until repairs are made... and many far more complex algorithms. While the modules should remain stable, power fluctuations or re-initialization may create the need to be flashed or reprogrammed. After many wasted hours, it was found that a power anomaly scrambled a SAM which needed to be re-programmed....Aaaargh!
     
  21. Rob43

    Rob43 Senior Member

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    Where in the trunk/cargo area was your subwoofer located, please reference this picture and give us a number.


    Rob43

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