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post #1 of 6 (permalink) Old Jan 13th, 2014, 11:40 AM Thread Starter
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United-States Speedo Error

Hi All,

I took delivery of my 2014 S Highgate Convertible last week. I finally got around to installing my GPS unit in it and notice that the speedo reads high by some 5%. When I'm going 80mph, the GPS reads 76.

The Highgate comes with 17" tires, so if anything, I would have expected the error to be in the other direction, if anything.

Is this something that can be easily adjusted??? Auto transmission by the way.....

Thanks!

Paul Cardoza
2014 Cooper S Convertible --- Highgate
New Bedford, Massachusetts USA
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post #2 of 6 (permalink) Old Jan 13th, 2014, 02:31 PM Thread Starter
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My apologies to everyone. I did some searching and found out this is a knows and very common problem. Sorry for wasting everyone's time!

Paul Cardoza
2014 Cooper S Convertible --- Highgate
New Bedford, Massachusetts USA
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post #3 of 6 (permalink) Old Jan 13th, 2014, 08:35 PM
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I think you will find that all speedometer's read a higher speed than is actually being travelled. That is so that there is some leeway for speed traps, you would not want it to be the other way around, going at 85 when you think you are doing 80.
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post #4 of 6 (permalink) Old Jan 13th, 2014, 09:20 PM
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Welcome to a European car! The rules here are that the speedo must not under-read, so the safest route for manufacturers is to make them over-read generously. As you've found out, all Minis do it!
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post #5 of 6 (permalink) Old Feb 10th, 2014, 08:00 PM
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If you enter the car's hidden service menu on position 09 it will show you both speeds : Veff (true) and Vdsp (display speed).

To enter the service menu:
- Press the 0.0 button on the tachometer until you see VIN
- Immediately press the 0.0 key multiple times unti you get to menu 19
- There you need to enter to enter the sum of your VIN (i.e. if TL37565 then enter 26)
- You do that with short press of the 0.0 button
- Then go to menu 09 and you will be in speed menu. Short press 0.0 to switch between the different speeds.

PS: I know, it is a little difficult to control the menu using 1 key only, but you will get used to it. Long press to enter Main selection options and short press for options within menu. In the menus you will find detailed sensor readings, battery voltage, coolant temeperature etc...
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post #6 of 6 (permalink) Old Feb 10th, 2014, 10:06 PM
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Paul

it does not matter what size wheel your mini was delivered with, mini varies the aspect ratio of the tire with wheel size to maintain the same OD of the tire

on my all4, i replaced the stock 225/45R18 tires with 225/50R18s and now my speedo reads spot on! (od of oem tires was 25.9 inches, od of new tires is 26.9 inches)

scott

2012 CM S All4 (03/12) | Abs Black w/White Roof/Mirrors/18" White Wheels | Cold Pkg | Sport Pkg | Xenon w/ Black Housings| Manual | Sport Susp| Anth Headliner | Flat Load Floor | Bluetooth | 2 Part Center Rail | Milltek downpipe back exhaust
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