Toyota Rav4 EV Forum
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Battery light on!!!
http://www.myrav4ev.com/forum/viewtopic.php?f=8&t=2307
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Author:  stradivaria [ Mon Dec 03, 2018 9:08 am ]
Post subject:  Battery light on!!!

Hi, I have a problem with RAV4.
I have 12V battery signal all the time on (small read battery on the speedometer) I am not sure that it is for a 12v system malfunction.
I had some problems with the main battery (contactors was replaced) no faults in the Tesla system side, but light still lights on all the time.

Does anybody experience that light on? What does this light stand for?

Thank you!!!!

Author:  TonyWilliams [ Mon Dec 03, 2018 2:03 pm ]
Post subject:  Re: Battery light on!!!

stradivaria wrote:
Hi, I have a problem with RAV4.
I have 12V battery signal all the time on (small read battery on the speedometer) I am not sure that it is for a 12v system malfunction.
I had some problems with the main battery (contactors was replaced) no faults in the Tesla system side, but light still lights on all the time.

Does anybody experience that light on? What does this light stand for?

Thank you!!!!


The DC to DC converter may have failed. Turn the car to READY (ON), and use a voltmeter to measure 14 volts (plus or minus 0.5 volts) on the 12 volt battery.

If you have 12.7 volts or less, the DC to DC has failed.

Author:  stradivaria [ Tue Dec 04, 2018 10:07 am ]
Post subject:  Re: Battery light on!!!

It is charging, I have measured 14,3V in Ready modus.

Is this light stands for 12V system or for HV system faults?




TonyWilliams wrote:
stradivaria wrote:
Hi, I have a problem with RAV4.
I have 12V battery signal all the time on (small read battery on the speedometer) I am not sure that it is for a 12v system malfunction.
I had some problems with the main battery (contactors was replaced) no faults in the Tesla system side, but light still lights on all the time.

Does anybody experience that light on? What does this light stand for?

Thank you!!!!


The DC to DC converter may have failed. Turn the car to READY (ON), and use a voltmeter to measure 14 volts (plus or minus 0.5 volts) on the 12 volt battery.

If you have 12.7 volts or less, the DC to DC has failed.

Author:  miimura [ Tue Dec 04, 2018 6:41 pm ]
Post subject:  Re: Battery light on!!!

stradivaria wrote:
It is charging, I have measured 14,3V in Ready modus.

Is this light stands for 12V system or for HV system faults?


Image

I think this should answer your question.

Author:  TonyWilliams [ Tue Dec 04, 2018 7:19 pm ]
Post subject:  Re: Battery light on!!!

Have you done a load test on the existing 12 V battery?

Author:  stradivaria [ Tue Dec 11, 2018 2:50 pm ]
Post subject:  Re: Battery light on!!!

Found the faults, fixed... The case is closed :)

Author:  TonyWilliams [ Tue Dec 11, 2018 7:26 pm ]
Post subject:  Re: Battery light on!!!

stradivaria wrote:
Found the faults, fixed... The case is closed :)


What was the issue?

Author:  dstjohn99 [ Thu Dec 13, 2018 6:07 pm ]
Post subject:  Re: Battery light on!!!

stradivaria wrote:
Found the faults, fixed... The case is closed :)


Yes, it would sure be nice if you shared the details so that other's may learn from your experience. You were certainly eager to find help on this forum, so will you also share to help others that might encounter the same or a similar issue?

Author:  alflash [ Thu Mar 14, 2019 1:36 am ]
Post subject:  Re: Battery light on!!!

This is the result of the operation of the RAV4EV,
Image
which occasionally / occasionally turned on the fault indicator of a 12V battery (https://youtu.be/i3_7cYj0wXw)

Author:  TonyWilliams [ Sun Mar 17, 2019 10:55 pm ]
Post subject:  Re: Battery light on!!!

alflash wrote:
This is the result of the operation of the RAV4EV


We now modify all RAV4 (Tesla) motor assemblies with a drain hole for leaking coolant.

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