GOM Drop After Turning Off Car?

R

rhysaveryrb

New Member
Just wondering if anyone here has their GOM drop when turning off their car? Recently my GOM would drop a decent portion of miles off once I turn off the car. For example I ran to take care of an errand today and the GOM was registering 116 miles of range left with 96% battery in Mid mode (75F was the outside temperature) after driving but when I parked and turned off the car, the GOM said 94 miles. When I turned the car back on, the GOM said 115 miles of range.

I know the GOM is absolutely useless and I don't rely on it but it used to just keep the last registered range left when I turned the car off before. I'm just a little concerned if there might be something wrong with the battery pack or something that is causing the GOM to recalculate and drop off so many miles once the car is off. Thanks in advance for the responses!
 
I can't remember seeing that much difference, however it definitely changes between turning off, then on again. I will say that recent firmware updates have made my GOM more consistent. It is now very close to 40% out consistently. That is easy to do in your head - get the current range, double, double again and divide by 10. Add that to the current range, and that is the actual range. Ok, maybe not that easy. I have seen the GOM drop between turning off and on again, but it then only drops a km or so in the next 10 till it catches up. I wouldn't worry at all about the GOM, and definitely wouldn't worry about a potential battery problem based on the GOM. Next time, note the percent just before you turn off, then again when you turn on. You can drop maybe a percent if the fan (glycol A/C) stayed on to cool the batteries, but it should be minimal. Basically, ignore the GOM :)
 
vader said:
You can drop maybe a percent if the fan (glycol A/C) stayed on to cool the batteries, but it should be minimal.
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I'm pretty sure the cabin is R1234YF but the HV batteries are water/glycol cooled instead of the banned R134a refrigerant on the i3.
 
Yep, that is what I mean. There are 2 A/C (cooling/heating) systems. One is for the cabin, but the glycol one is for the battery.
 
vader said:
I can't remember seeing that much difference, however it definitely changes between turning off, then on again. I will say that recent firmware updates have made my GOM more consistent. It is now very close to 40% out consistently. That is easy to do in your head - get the current range, double, double again and divide by 10. Add that to the current range, and that is the actual range. Ok, maybe not that easy. I have seen the GOM drop between turning off and on again, but it then only drops a km or so in the next 10 till it catches up. I wouldn't worry at all about the GOM, and definitely wouldn't worry about a potential battery problem based on the GOM. Next time, note the percent just before you turn off, then again when you turn on. You can drop maybe a percent if the fan (glycol A/C) stayed on to cool the batteries, but it should be minimal. Basically, ignore the GOM :)
Click to expand...

Thanks! Percentage remains the same after overnight so I guess I shouldn't worry about it. It's just odd. I did notice that the GOM might hack off a 1 mile or 2 when I turned the car off but dropping 22 miles had me concerned something was up with car. Thanks again for the responses!
 
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