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2001 V70 XC , speedometer misreads 137km/h when actual speed is 120km/h

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shodanx
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2001 V70 XC , speedometer misreads 137km/h when actual speed is 120km/h

Post by shodanx » Mon Jun 17, 2019 6:04 pm

Hi,

I have a good condition 2001 V70 XC with 652000 km on the odometer.

However the speedometer reads about 15% too fast.

I have 205/55R16 tires on there but I believe it was originally 215/65r16. This should account for about 8% of the difference.

Is there any way to adjust the speedometer to match actual speed ?



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Rattnalle
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Re: 2001 V70 XC , speedometer misreads 137km/h when actual speed is 120km/h

Post by Rattnalle » Tue Jun 18, 2019 2:15 am

Correct Tyre size would be a better option. As it is now you're getting the wrong gear ratios and everything as well as the speed showing too high. 214/65-16 is indeed the correct one. The car is programmed so it'll show a few km too high with the correct tyres as well if compared to a GPS but the difference should be quite small.

Speedometer can be adjusted but you need to find someone who can change the carconfig to do it.



shodanx
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Re: 2001 V70 XC , speedometer misreads 137km/h when actual speed is 120km/h

Post by shodanx » Tue Jun 18, 2019 11:20 pm

Can the adjustment be done using VIDA ? (I have it working)

This is my backup car so I'll be with these tires until they wear out (probably 2 more summers). So I'd like to adjust if possible.



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Rattnalle
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Re: 2001 V70 XC , speedometer misreads 137km/h when actual speed is 120km/h

Post by Rattnalle » Wed Jun 19, 2019 1:48 am

A regular vida doesn't have the capability to change the carconfig. People who can reprogram the car to add equipment should be able to help though. I only know a guy here in Sweden not on your end. But im thinking trying to swap tyres with someone is probably cheaper.



shodanx
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Re: 2001 V70 XC , speedometer misreads 137km/h when actual speed is 120km/h

Post by shodanx » Sat Jun 22, 2019 1:19 am

Thanks,

Is this a special version of vida ? Does it have a distinctive name I could search for ?

This is my backup car and I don't want to spend more on tires than I already have. So it will stay like that until they are used up.



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abscate
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Re: 2001 V70 XC , speedometer misreads 137km/h when actual speed is 120km/h

Post by abscate » Sat Jun 22, 2019 3:45 am

You probably got the speedo from an R.

( MVS humour)


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Re: 2001 V70 XC , speedometer misreads 137km/h when actual speed is 120km/h

Post by XC70Rider » Sat Jun 22, 2019 5:29 am

Smartphones have speedometer applications. Mount it safely on window or vents using magnets.

Had this mount for a over a year in my P2.

https://www.amazon.com/IPOW-Universal-M ... 146&sr=8-3



shodanx
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Re: 2001 V70 XC , speedometer misreads 137km/h when actual speed is 120km/h

Post by shodanx » Mon Jun 24, 2019 5:34 pm

I have an android auto dock works great but if I want to use the gps app I need to exit android auto, it's kind of annoying but that'll do I guess.

Though, the computer is so conveniently accessible, I am tempted to mess with it with my microcontroller programming tools



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