How to reset your GOM (secret menu!)

My from-the-factory GOM read 108 miles in Green+, so that process doesn't exactly correspond to a "factory reset". I've also never driven a mile in temps over 40F & it's still colder than that (20s/30s) so I don't think the current weather or previous weather has anything to do with what it comes up with. I'm not sure if this reset is a good thing or not, but the 4 miles I've driven since used 2% where it used to use 5-6%. Definitely need more data to figure out what exactly is going on.

 

I'm beginning to think temperature is a factor when it comes to the GOM calculation, at least when you first start out. I don't have enough data to point to anything specific yet, but I've seen some big jumps in GOM range day-to-day when the only significant change is temperature.

 

That’s my observation as well. As outside temperature changes I’ve seen significant change in GOM range prediction.

On one cold (5F & windy) day GOM predicted 103 miles range on full charge. After driving 2 miles range dropped to 73 miles. Later that day, at 35F, again driving another 2 miles, range jumped back to 93 miles.

 

Finally remembered to reset the GOM after I dropped off the kids for school this a.m. I had about 97% battery charge left when I did it. At 90%, the GOM predicted 112 mi. It was 50 F outside, and I was in sport mode. I average about 4.5 mi/kwh on this leg of my commute.

 

This is the kind of ???'s that the manufacturer should be providing answers to right in the owners manual. Explain how they set it up to work.

 

Does resetting lose the car's averaging over distance and temp to get at a prediction?

 

I've experimented with resetting the GOM once. But I think the GOM is only using the last 5 miles (or 5km) or so to calculate the average. So resting it only changes the value for a short time. It's seems to come up with the same range again after it recollects just a little bit of history after the reset.

I think the greatest limitation of the GOM is that it does not use elevation in it's calculation. The car knows the elevation and I think it could calculate and average elevation change in the general direction you are heading.

For example, I left Estes Park, CO with a 90 mile range estimate. By the time I coasted all the way down to Loveland,CO (25 minutes) the range climbed up to about 140 miles. But then after driving in Loveland (flat ground) for about 5 minutes the range dropped to a more realistic 80ish miles. Changes in elevation can really make the GOM erratic. It can be scary if you have an entirely uphill trip that could test your range. If I had 100 miles on my GOM and I was going to go uphill into the mountains I would count on getting about half that for my range.

I can tell by how elevation can make the GOM erratic that the GOM is not using a lot of history for it's calculation. So I don't think resetting it frequently is going to change anything (for very long).

 

I thought just coasting the Mini is impossible due to the regen brake function always being on ? Also I watched a youtuber recently stating that on his i3 that he thinks the GOM is tied into the trip planner function. Meaning when you put in a route the system knows the lay of the land, so to speak and adjusts the GOM accordingly. I mention the i3 because it and the mini come from the same chicken.

 

I'm still unclear about the benefit or even the actual effect of resetting the GOM. No two people are reporting the same results.

The biggest problem with the GOM is that it doesn't know where you will be driving or the conditions through which you will be driving. Once the GOM is modified to see into the future, it will be completely accurate (I hope they'll include a lottery number button).

 

Agreed. I pretty much pretend the GOM does not exist and just use battery-%. Now, if we could control which trip computer value displays where GOM currently sits, that would be AMAZING.

 

When I was in an ICE Clubman S loaner for a week I noticed the fuel GOM is even worse! The memorable moment was when I started the car and the GOM said 58 miles remaining, and after driving about two miles it said 42 miles remaining. Needless to say I suffered ICE range anxiety since I forgot where to find and how to pump fuel.

 

There are two ways to coast the SE: shift into neutral; or find and hold with your foot the sweet spot between acceleration and braking on the e-power gauge on the left.

 

Shhhh those are secret manual transmission techniques. Don't tell them about the third pedal.

 

Watching Archer?

 

As was posted/suggested by others last summer, I just went to using the % battery number at the bottom of the screen. It has kept us from ever having range anxiety. Normally you can expect 1% charge to equal a bit over 1 mile of range in Green mode. It makes for an easy one-to-one conversion. As others have posted on this thread, the only safe way one could rely on the G-O-M would be to reset it regularly. I'll stick to using the % battery number and continue to use the G-O-M for its entertainment value

 

This is what I did in my i3 as well. 1% to 1mile of range was always a safe bet.

 

I will try it today !! thanks everyone

 

Well spotted! We were watching Archer on the iPad while we were charging. I used to watch it on tv but stopped so we’re now working through all seasons on Netflix.

 

Interesting, but after doing this a couple times and reading all the anti-GOM advice I completely agree. The GOM is next to useless, unless you just want a very conservative and inaccurate estimation of miles. First time I did it I was thrilled to see 134mi on 100% charge at about 50F. Then it changed dramatically the next day, though my usage and charge did not. Frankly, I'm happy to use the charge percent as my true indicator, and am still VERY happy with the range at NorCal temps (it did get down to a weenie-shrinking 27F this morning!). Great input from all, as always!