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sdbonez
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Joined: Tue Sep 28, 2010 11:44 pm
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Location: San Diego, Ca (San Marcos)

Driving range display 'changes' after NTB11038 Svc Campaign

Wed Apr 20, 2011 8:13 pm

I searched and couldn't find any dedicated threads to this and wanted to start a new one since others may be missing the reports here and here. I suspected this yesterday but after my standard commute today, I know this for a fact. My range has been 'reduced' following the VCM reprogram yesterday as a part of the NTB11038 service campaign.

I'll also note that I believe (haven't yet proven) that the range is indeed more accurate. I view this as a good thing.

Several of us noted the careful wording by Nissan in the email we received stating that the VCM program would also "improve the accuracy of the driving range display." I had a drop of a couple of bars 'in the service bay' with no driving which made me suspicious. The service manager was also asking curious questions about whether I noticed a difference. So I was extra careful to map my commute today to another carefully tracked commute I had done previously today.

Initial estimates show that my 'bars' appear to 'drop' approximately 10% faster. I think they also may be more stable and again, I think they may be more accurate as Nissan noted in their email. I also noticed that I 'lost' a bar between when I turned off/parked my car and when I turned it on which I found odd.

What's everyone else seeing?
EV Prj: prereg 4/19 11:21a, appvd 7/22 11:34a, on-site eval 8/27 1pm, installed 3/30
Leaf: Red eTec resvd 4/20 2:33p, order open 8/31 11:30a, confirmed 9/3 2:00p, Carwings 3/9
Dash@Delivery 4/8, 7-day on 3/23, Delivered 03/30, Carwings: 'Bonez' VIN#728

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malloryk
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Location: Santa Monica, CA

Re: Driving range display 'changes' after NTB11038 Svc Campaign

Wed Apr 20, 2011 8:25 pm

I lost 3 bars with the update. which ok, that's fine that it recalibrated, but I don't think my car was ever plugged in while they had it. It wasn't sitting plugged in to the EVSE in the customer parking when I went to pick it up. It was just sitting on a regular lot unplugged. They had it for a couple hours between calling me to tell me it was ready and when I picked it up.

oh and I had to reset my timers
Previous Leaf SL w/QC Owner
Current CMAX Energi (302A Package) Owner
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sdbonez
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Re: Driving range display 'changes' after NTB11038 Svc Campaign

Wed Apr 20, 2011 8:52 pm

malloryk wrote:I lost 3 bars with the update. which ok, that's fine that it recalibrated, but I don't think my car was ever plugged in while they had it. It wasn't sitting plugged in to the EVSE in the customer parking when I went to pick it up. It was just sitting on a regular lot unplugged. They had it for a couple hours between calling me to tell me it was ready and when I picked it up.

oh and I had to reset my timers
Mine went from my hands to the bay 50ft away and straight back - 40mins. I did a full charge last night and then today, carefully ran my regular route which I have down to a science (I know almost exactly to the light when the bars are going to 'drop' +/1 a couple of hundred feet usually). A little extrapolation is what yielded the 10% figure I mentioned above (might be closer to 8%) based on bar 'drops' that occurred over a 50.5 mile roundtrip today...but I did have to estimate partial bars that were left.

I'm making the improved accuracy claim because the bars also dropped at more consistent intervals than they usually do when adhering to a consistent driving style --- I think this is what ultimately led it to feeling more stable.... more predictable. (Though I still wish I could just see an accurate battery reading at all times).

I've never tracked the jumping around of the range display so I can't quantify accuracy...but it makes me wonder if the 'improved accuracy' isn't a strategy to help those of us pushing toward turtle mode on a regular basis to have more confidence in the range display at low SOC (or to avoid dead turtles...).
EV Prj: prereg 4/19 11:21a, appvd 7/22 11:34a, on-site eval 8/27 1pm, installed 3/30
Leaf: Red eTec resvd 4/20 2:33p, order open 8/31 11:30a, confirmed 9/3 2:00p, Carwings 3/9
Dash@Delivery 4/8, 7-day on 3/23, Delivered 03/30, Carwings: 'Bonez' VIN#728

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GeekEV
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Re: Driving range display 'changes' after NTB11038 Svc Campaign

Wed Apr 20, 2011 8:56 pm

I had noticed a change as well, though a bit different:

http://www.mynissanleaf.com/viewtopic.php?f=27&t=3263

Now that we know the update DID include range changes, maybe my observations were related after all.

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evnow
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Re: Driving range display 'changes' after NTB11038 Svc Campaign

Wed Apr 20, 2011 9:01 pm

Any observations on how fast or slow the range estimate changes (say as you get on to the highway) ?
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turbo2ltr
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Re: Driving range display 'changes' after NTB11038 Svc Campaign

Wed Apr 20, 2011 9:11 pm

SOC Bars and "driving range display" are two different things. I would not expect any change in the bar display if they say they are adjusting the driving rage display.
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turbo2ltr
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Re: Driving range display 'changes' after NTB11038 Svc Campaign

Wed Apr 20, 2011 9:16 pm

If I decide to get the update (Don't fix what aint broke), I could easily identify if the points at which the bars turn on and off changed in relation to SOC since I've logged that data previously.
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palmermd
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Re: Driving range display 'changes' after NTB11038 Svc Campaign

Wed Apr 20, 2011 9:17 pm

turbo2ltr wrote:SOC Bars and "driving range display" are two different things. I would not expect any change in the bar display if they say they are adjusting the driving rage display.
+1
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Randy
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Re: Driving range display 'changes' after NTB11038 Svc Campaign

Wed Apr 20, 2011 9:30 pm

Does anyone know what the part number is for the upgraded software? My software was upgraded on 4/5 to 237D0-6NA0C, but I haven't noticed anything yet with the range-o-meter...

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sdbonez
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Re: Driving range display 'changes' after NTB11038 Svc Campaign

Wed Apr 20, 2011 9:59 pm

GeekEV wrote:I had noticed a change as well, though a bit different:

http://www.mynissanleaf.com/viewtopic.php?f=27&t=3263

Now that we know the update DID include range changes, maybe my observations were related after all.
I missed your note on this - but it goes with my reasoning for stabilizing the low end.
palmermd wrote:
turbo2ltr wrote:SOC Bars and "driving range display" are two different things. I would not expect any change in the bar display if they say they are adjusting the driving rage display.
+1
turbo2ltr wrote:If I decide to get the update (Don't fix what aint broke), I could easily identify if the points at which the bars turn on and off changed in relation to SOC since I've logged that data previously.
Wish I had the ability for more quantitative analysis like this... but I log my trips daily and today's was the first where bar-usage stood out like a sore thumb. I'd love to get at least a wider data pool (both myself with more tests as well as the observations of others)...if not someone actually measuring the damn thing...
EV Prj: prereg 4/19 11:21a, appvd 7/22 11:34a, on-site eval 8/27 1pm, installed 3/30
Leaf: Red eTec resvd 4/20 2:33p, order open 8/31 11:30a, confirmed 9/3 2:00p, Carwings 3/9
Dash@Delivery 4/8, 7-day on 3/23, Delivered 03/30, Carwings: 'Bonez' VIN#728

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