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TonyWilliams
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Re: Speedometer calibration ?

Wed Feb 29, 2012 8:26 pm

garygid wrote:Where does one see the "Average Speed" displayed, please?


It's on the driver's console with miles/kWh.

dhanson865
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Re: Speedometer calibration ?

Thu Jun 04, 2015 7:59 pm

TonyWilliams wrote:Have you tried the calibration settings in the service menu?

(Audio Power off, Map, Map, Map, Audio Power, Audio Power, Map)

...

The adjustment in the service pages, "Navigation", "Speed Calibration", is only +/- 2.5%.


Thank you very much!

I was about to buy tires and knowing I can adjust this by 2.5% is very nice.

I did fail to get in on the first couple of tries. You have to hit the sequence at a relatively fast speed. I was doing it more slow and deliberate the first two tries. Do it faster and it works on the first try every time.
Blue 2012 Leaf 195/65/15 tires, 15" Rims
Silver 2012 Leaf 16" stock wheels
wiki/index.php?title=Real_World_Battery_Capacity_Loss
(efficiency 3.x KW vs 6.x KW)
please join Truedelta.com and input your repairs.

LeafMuranoDriver
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Delivery Date: 01 May 2015
Leaf Number: 323189
Location: Los Angeles, CA

Re: Speedometer calibration ?

Fri Jun 05, 2015 8:22 am

How can you adjust it with an S model? Any other way besides taking it into Nissan to have them change it?

Mine isn't off really bad but it's annoying. 1mph off @ 30mph, 2mph off @ 50mph, 3mph off @ 65mph, 4mph off @ 75mph.
2015 Leaf S w/ QC
Mfg: Jan. '15 // Pur: May '15
Best: 6/27/15 - 1,416 Miles - 292 GIDs - 63.11 Ahr - 22.6 kWh - 100% SOH - 97.2% Hx - 4 QC, 29 L2
Worst: 12/12/15 - 4,616 Miles - 259 GIDs - 55.02 Ahr - 20.1 kWh - 99% SOH - 82.8% Hx - 17 QC, 96 L2

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dgpcolorado
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Delivery Date: 15 Dec 2011
Location: The Western Slope, Colorado

Re: Speedometer calibration ?

Fri Jun 05, 2015 9:25 am

dhanson865 wrote:Thank you very much!

I was about to buy tires and knowing I can adjust this by 2.5% is very nice.

I did fail to get in on the first couple of tries. You have to hit the sequence at a relatively fast speed. I was doing it more slow and deliberate the first two tries. Do it faster and it works on the first try every time.
I found that it was more practical to adjust it by 2%. When I tried 2.5% my speedometer would bounce up and down 1 mph when cruise control was set. I found that annoying so I backed it off to 2% and the problem went away. FWIW.
Blue 2012 SV Dec 2011 to Feb 2016
CPO 2014 Tesla S60 Mar 2016
One car, no ICE, at last!
Tesla Referral Code

dhanson865
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Re: Speedometer calibration ?

Fri Jun 05, 2015 10:37 am

dgpcolorado wrote:
dhanson865 wrote:Thank you very much!

I was about to buy tires and knowing I can adjust this by 2.5% is very nice.

I did fail to get in on the first couple of tries. You have to hit the sequence at a relatively fast speed. I was doing it more slow and deliberate the first two tries. Do it faster and it works on the first try every time.
I found that it was more practical to adjust it by 2%. When I tried 2.5% my speedometer would bounce up and down 1 mph when cruise control was set. I found that annoying so I backed it off to 2% and the problem went away. FWIW.


Do you know the RPM of the tires you were using when that happened?

Check the specs tab on tirerack.com for the tire in question.

I got a used leaf with Goodyear Eagle RS-A tires and they have good traction in dry summer conditions but suck for rolling resistance, wet traction, snow traction, basically anything other than dry pavement.

Eagle RS-A 205/55/16 is 23 pounds and 840 rpm

stock tires according to tirerack for my 2012 SL are Bridgestone Ecopia EP422 205/55/16 at 20 pounds and 837 rpm

I'm planning on trying to find some more Energy Saver A/S and if I can I'll do a -1 conversion with some new rims and go to

Energy Saver A/S 195/65/15 at 18 pounds and 832 rpm.

I'm not sure the exact adjustment I'll need to get the speedometer accurate but I'm assuming it will be greater than 2.5% with in tire in the 830-840rpm range. I'll be testing that with my 840 rpm tires in the next day or two.
Blue 2012 Leaf 195/65/15 tires, 15" Rims
Silver 2012 Leaf 16" stock wheels
wiki/index.php?title=Real_World_Battery_Capacity_Loss
(efficiency 3.x KW vs 6.x KW)
please join Truedelta.com and input your repairs.

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dgpcolorado
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Re: Speedometer calibration ?

Fri Jun 05, 2015 1:45 pm

dhanson865 wrote:Do you know the RPM of the tires you were using when that happened?...
No, and my sense was that it doesn't matter. What I found was that the set point of the cruise control changed when using that speedometer adjustment and 0.5% changes caused the cruise set point, as measured by the speedometer, to appear unstable, which I found annoying. So I dropped the adjustment to the next whole number, 2%, and the problem went away. It had nothing to do with tires or wheel rpm, it is an artifact of the electronic control of cruise setting. That's all I'm saying. I mention it in case someone else notices it and wonders why the cruise seems unstable.

After making the adjustment I find that 61 mph indicated is about 59.5-60 mph actual, as measured by a radar detector here — located on a curve so that it is pointing almost directly down the highway, by the way — using nearly new Ecopia tires. I think that's as close as I'm going to get to an accurate speedometer reading without some sort of dealer adjustment. And it is good enough for me.
Blue 2012 SV Dec 2011 to Feb 2016
CPO 2014 Tesla S60 Mar 2016
One car, no ICE, at last!
Tesla Referral Code

dhanson865
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Re: Speedometer calibration ?

Fri Jun 05, 2015 3:15 pm

I went out and tried using GPS speedometer to compare but no matter if I set it +2.5% or -2.5% my dash showed a couple miles an hour fast.

I wonder if you have to come to a stop and/or power cycle the entire car while in park to get the change to take effect?

That would require a lot more trips from 0 to 60 and back to 0 to change the setting and try again. But as cumbersome as that is, that is what I plan to do next.
Blue 2012 Leaf 195/65/15 tires, 15" Rims
Silver 2012 Leaf 16" stock wheels
wiki/index.php?title=Real_World_Battery_Capacity_Loss
(efficiency 3.x KW vs 6.x KW)
please join Truedelta.com and input your repairs.

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TomT
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Re: Speedometer calibration ?

Sat Jun 06, 2015 9:53 am

It won't work if the car is going faster than 5MPH... You need to calculate the offset needed (in my case it was 2.4% fast) and then enter it when stopped.

dhanson865 wrote:I wonder if you have to come to a stop and/or power cycle the entire car while in park to get the change to take effect?
59,991 miles/12 bars/289 Gids/68.54 AHr/101% SOH/101.64% Hx 7May15 w/ new Lizard (barely made the warranty).
71,770 miles/12 bars/256 Gids/59.04 AHr/88% SOH/87.92% Hx 3Mar16 at lease return.

Now driving a 2016 Volt Premier.

JeffInCO
Posts: 8
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Re: Speedometer calibration ?

Fri Nov 27, 2015 6:48 am

I have a 2015 SV that came with 17" wheels. I recently switched them out for 16" winter wheels/tires, and tried to recalibrate. I tried +2.4%, +2%, -2%, -2.4% and the setting seems to have no effect on the dash speed. (I power-cycled the vehicle before driving after each setting change.)

Has anyone had success changing the calibration on a recent vehicle? If so, what steps did you take?

Thanks,

Jeff

dhanson865
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Re: Speedometer calibration ?

Fri Nov 27, 2015 8:32 am

JeffInCO wrote:I have a 2015 SV that came with 17" wheels. I recently switched them out for 16" winter wheels/tires, and tried to recalibrate. I tried +2.4%, +2%, -2%, -2.4% and the setting seems to have no effect on the dash speed. (I power-cycled the vehicle before driving after each setting change.)

Has anyone had success changing the calibration on a recent vehicle? If so, what steps did you take?

Thanks,

Jeff


Consider 2.4% at 51 miles an hour would still be 50 miles an hour (only 1 mph indicated difference). At 80 mph a 2.4% difference indicates 2 mph difference.

It is very hard to tell the difference without a perfectly flat straight road, high speed, and a very responsive accurate GPS speedometer.

I found my GPS speedometer app was always a second or so behind and I couldn't keep a steady speed (no such thing as a flat highway around here).

Maybe a dyno would make it easier to test? Or maybe just take it on faith and leave it at -2.x%?
Blue 2012 Leaf 195/65/15 tires, 15" Rims
Silver 2012 Leaf 16" stock wheels
wiki/index.php?title=Real_World_Battery_Capacity_Loss
(efficiency 3.x KW vs 6.x KW)
please join Truedelta.com and input your repairs.

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