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My GoM was working perfectly after the brake regen update until I brought the car in for the unexpected battery drain. The service advisor told me that they couldn't reproduce the problem and that the car was on the latest software and that no updates were introduced. I drove home and now the GoM is stuck at 201 miles at 100% SoC and the reset procedure no longer works. I have no fricking idea what happened while the car was in for service! My last long driver prior to the trip to the dealer showed the GoM was within 1.4 miles after a 100 miles trip. I was happy that for some reason my car had escaped the GoM breaking but now it is not even close to real-world conditions.
 

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After actually reading the entire Topix bulletin... it states that the GoM should slowly reset after 11 hours of driving. Has anyone who experienced this issue have the GoM come back to somewhat a normal state?
 

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Discussion Starter #24
Just an update to this thread: I am able to reset now using the brake and accelerator pedal method. Maybe it has something to do with me resetting the "roadside assistance button."
 

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Just an update to this thread: I am able to reset now using the brake and accelerator pedal method. Maybe it has something to do with me resetting the "roadside assistance button."
I'm imagining 100 guys, including myself, running out to their cars to try this technique. If true, bruintoo will be the hero of the forum. I will try this tomorrow morning as my wife already thinks I'm crazy by sitting in the car during the night pushing buttons.
 

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I was getting the 201 mile GoM estimate, but I just ignored and continued driving. Not that I checked every day, but after some time which is like over the last 2-3 weeks, it is not stuck to 201 anymore when full charge is completed. It has posted 208, 205, 203, so there is some variance. This is with different driving since the trips are not the same each day. This after I had the aux battery replaced where before I was getting GoM estimates in the 230 range. The most we drive is about 120miles in a day, so not really worried about the complete full range based on how the vehicle is driven.
 

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I was getting the 201 mile GoM estimate, but I just ignored and continued driving. Not that I checked every day, but after some time which is like over the last 2-3 weeks, it is not stuck to 201 anymore when full charge is completed. It has posted 208, 205, 203, so there is some variance. This is with different driving since the trips are not the same each day. This after I had the aux battery replaced where before I was getting GoM estimates in the 230 range. The most we drive is about 120miles in a day, so not really worried about the complete full range based on how the vehicle is driven.
Thanks, alphanstein. I tried resetting the Jaguar assistance button and then the GoM but was unsuccessful. I guess I need to be patient and hope to have it change over time.
 

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Range Reset

I have experienced range issues since Jaguar performed the two major software updates a few months ago. I was then told that the H228 Enhancement Program would resolve these issues. It did not resolve them so I have continued to complain to my dealer. Two weeks ago the dealer called me and asked to have my vehicle in the shop because they were about to have a visit from the Jaguar NA EV Specialist (apparently the only one in the US), Martin Barratt. After Martin had worked on my vehicle he reset the range to 282 by gunning it from stationary to 45mph three or four times which he informed me is now the Jaguar recommended reset method and all previous methods no longer work. He also informed me currently the range after a full charge will always read either 201 or 282. The problem for me is that neither of these numbers is close to being accurate. I have calculated that the real range for my car is around 180 or slightly less. Bottom line is that you cannot rely on the range indicator which really makes road trips difficult. Martin said that Jaguar Software Engineering are working on a new software to restore the range. It would seem that the updates have destroyed the ability of the vehicle to adjust the range prediction based on driving style, terrain, and traffic conditions.

Oh and by the way I now have another phenomenon in that if I select Eco driving mode the range reverts to 201 but if I select Comfort mode (the default) it will show 282. Also if I turn the A/C off the range will show 201. I can only get 282 range with the A/C turned on. Martin says that is because he calibrated it with the A/C on to allow for the heat in Arizona.
 

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After Martin had worked on my vehicle he reset the range to 282 by gunning it from stationary to 45mph three or four times which he informed me is now the Jaguar recommended reset method and all previous methods no longer work. He also informed me currently the range after a full charge will always read either 201 or 282.
Bad news is the GoM is even more worthless than it was before. Good news is that resetting it is a lot more fun than it was before!
Can't wait until morning to try it!
 

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Discussion Starter #31
I have experienced range issues since Jaguar performed the two major software updates a few months ago. I was then told that the H228 Enhancement Program would resolve these issues. It did not resolve them so I have continued to complain to my dealer. Two weeks ago the dealer called me and asked to have my vehicle in the shop because they were about to have a visit from the Jaguar NA EV Specialist (apparently the only one in the US), Martin Barratt. After Martin had worked on my vehicle he reset the range to 282 by gunning it from stationary to 45mph three or four times which he informed me is now the Jaguar recommended reset method and all previous methods no longer work. He also informed me currently the range after a full charge will always read either 201 or 282. The problem for me is that neither of these numbers is close to being accurate. I have calculated that the real range for my car is around 180 or slightly less. Bottom line is that you cannot rely on the range indicator which really makes road trips difficult. Martin said that Jaguar Software Engineering are working on a new software to restore the range. It would seem that the updates have destroyed the ability of the vehicle to adjust the range prediction based on driving style, terrain, and traffic conditions.

Oh and by the way I now have another phenomenon in that if I select Eco driving mode the range reverts to 201 but if I select Comfort mode (the default) it will show 282. Also if I turn the A/C off the range will show 201. I can only get 282 range with the A/C turned on. Martin says that is because he calibrated it with the A/C on to allow for the heat in Arizona.
I don't know what to say about this. Because I upgrade to the H228 and the latest 19A infotainment software. However I believe I'm still on 14.2 on telematics. The old method of GOM works for me now, but it didn't before. Maybe it is a combination of H228, 19A, and 15.1 (some have this) that nullify the old method of resetting the GOM.
 

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BTW folks - I omitted to say in my previous message that the “NEW” reset procedure only works in ECO mode. I tried it in Comfort mode several times and it did not work. So, if you are following this you have to reset in Eco mode but to retain the higher predicted range you need to drive in Comfort mode. Oh, BTW, after you have driven a few miles (I haven’t figured out exactly how many yet) the range will drop to a lower total anyway which kind of makes a nonsense of resetting it in the first place.
 

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Hello All - If I'm reading this right - I can't see any value to re-setting this to an arbitrary value which would mean nothing to your actual mileage.

Makes more sense to first check the cars "True Mileage" (odometer) by fully charging then driving in your own manner to first see how close this reading is to your true actual Mileage. In other words, it might be perfect as it is.

If it happens to be way off, then it might be worth re-setting to see if it make the mileage more accurate, or it could change in the wrong direction.

Mike
 

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Since the meter adapts based on current state of charge, driving style, current temperature, consumption by vehicle features (e.g. AC), and route characteristics, resetting its learned knowledge will allow a new driver (for example the car was purchased used or it was a demo car) to start all over with the guessing. If the current driver changes driving style or commutes a different route, then it would also wipe out all the previous fudge factors for the guess and start over. New tires on the car would also be a good reason to reset it.

It's call artificial intelligence. Definitely artificial, but intelligence is anyone's guess.
 
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