Pint X - Error yellow 17 hot or cold with normal temp : How to change battery thermistor?
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Re: Error yellow 17 hot or cold with normal temp
Hello! :)
It seems my pint X is having the same issue than @agyas had more than three years ago now.
I am getting the hot or cold warning : "Your battery temperature is out of its safety range" when the temperature is normal.From what I understand from @Lemur 's answer to @agyas , one potential fix is to replace the four thermistors of the battery.
I would like to change them myself.
I found in this reddit thread someone giving the thermistor model for an XR.
Does someone know if the thermistor model is the same for a Pint X?
Do you have any other resources that could help me changing them on my own etc...?Thank you very much!
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@rob-s It may be a bit of a tricky repair to pull the thermistors from the pack but if you’re up for it those should work fine on a pint-x. It’s a fairly basic 10k thermistor so not hard to find alternatives for if the one mentioned isn’t easy to get where you are.
Regarding getting inside the battery Mario did a teardown of a 3rd party battery that isn’t too dissimilar in structure that may help you in your journey.
Best of luck with the repair :)
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@lia Thank you very much for your help :)
I'll order the thermistor you mentioned and see what i can do with the help of the video! -
Hey!
I have a CBXR which is exhibiting identical symptoms. Outside temperatures around 6 C or lower and the board starts throwing error 17, even though diagnostics show battery temp around 15-17 C.I have measured the resistance of the thermistors and they seemed fine-ish (between 10.2 and 10.3 kOhm at room temperature), but I went ahead and installed a new set of thermistors anyway. I have yet to test it out as the glue is still drying.
Here they are visible after plucking them out of the pack. It was strange to find them just hanging there, without actually being attached to anything, and covered by a thin layer of tape. I've decided to glue them to the cells to get a more accurate reading.
But I am still hesitant that this will fix the issue.
Is there a known problem with the BMS where its internal resistance becomes too high with cold weather that it triggers the fault itself, even with working thermistors?
Anything else I could check?The board is a 4209 without a chip. Battery is around 4 years old and I am a new owner. Previous owner said he has never ridden in weather colder than 15 C ambient...
Thanks for any input!
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@martinlink Personally not aware of known temp issues with the XR platform. Do you have any high res pics of the bms just in case I can spot anything that looks a bit off?
Being 4209 there's quite a lot of options if it is the BMS that's faulty. Hoping your thermistor swap worked but if it is the BMS there's probably a good few people in a local ride group with a bunch just laying around since most swap them out when vescing and have no other use for them.
For other checks I'd try probing between ground and each one of the thermistor pins on the BMS while it's disconnected from everything. All should return a similar reading to eachother. If you find one way out of line then that's where to start looking by tracing back that one pin to a component like a cap that may have gone bad or been knocked at some point.
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@lia thanks for the thorough reply! Too bad I've already reassembled the battery box, and will be assembling the board first thing tomorrow. Then it'll hopefully be dry & cold enough to test it.
If the issue persists, I'll tear it down once again and take some good pics, and also perform the measurements you mentioned.
I do vaguely remember measuring the thermistor resistances from the BMS (the legs of the white connector) when the battery was attached, and remember seeing slightly varying results, between 4 and 6 kOhm at room temperature. Just found it odd at the time because it was way lower than the specified 10 kOhm but didn't think much of the difference... As soon as I removed the plug and measured straight from there, they were around 10 kOhm as specified.
I'm from eastern Europe where the OW isn't really popular so my best bet will be finding one online - maybe someone happens to have one which will fit my board? I'd happily take it even if just as a backup.
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Wellll, no dice... New thermistors in, board on the balcony for a few hours at +6 C and almost immediately triggered the same fault. Battery temp at that moment +11 C.
If anyone has some more pointers or measurements to take to narrow it down, please let me know. I'll be disassembling it again today or tomorrow :(
Also, any working BMS on offer?
Thanks!
