Hi wanting to know if anyone can help im new to Forscan and wish to know if anyone can assist me in resetting my VSS for larger tyres i need to increase as my speedo is out by around 1015ks with my 34' tyres
Any help would be great and even explain
Thanks
2015 Ford Ranger xlt PX mk1 3.2ltr diesel
2015 Ford Ranger xlt PX mk1 3.2ltr diesel
Last edited by sarge on Sat Jan 21, 2017 1:14 am, edited 1 time in total.
Re: 2015 Ford Ranger xlt PX mk1 3.2ltr diesel
My XLS came with 255/70/16 tyres. The formula to figure out the nominal circumference of the tyre size is ((255 * 70 * 0.02) + (16 * 25.4) ) * Pi(3.14159). Result is 2398.2898. Multiply that by the conversion factor of 96.7% and you get 2319mm rounded off.
My “As Built” HEX at address 7261201 is 0163 0910 510E. 0163 is the diff ratio and 0910 is the tyre size. If you take 0910 in hex and convert to decimal you get 2320mm so its within 1mm.
So 285/75/16 tyres equal 2533mm. 2533 converted to HEX is 09E5 So when then you write 0163 09E5 51XX into address 7261201 the speedo will be correct. Don’t worry about changing the xx Forscan will calculate the checksum for you.
This does bring up a DTC in the PCM which can be seen with Forscan but doesn’t seem to affect anything.
This is for the MK2 so your address will be different. Try searching your As Built data for "0910" or send me your VIN and I will see if I can work it out.
0163 0910 510E is the mk2 manual.
0175 0910 5120 is the mk2 auto.
My “As Built” HEX at address 7261201 is 0163 0910 510E. 0163 is the diff ratio and 0910 is the tyre size. If you take 0910 in hex and convert to decimal you get 2320mm so its within 1mm.
So 285/75/16 tyres equal 2533mm. 2533 converted to HEX is 09E5 So when then you write 0163 09E5 51XX into address 7261201 the speedo will be correct. Don’t worry about changing the xx Forscan will calculate the checksum for you.
This does bring up a DTC in the PCM which can be seen with Forscan but doesn’t seem to affect anything.
This is for the MK2 so your address will be different. Try searching your As Built data for "0910" or send me your VIN and I will see if I can work it out.
0163 0910 510E is the mk2 manual.
0175 0910 5120 is the mk2 auto.
Re: 2015 Ford Ranger xlt PX mk1 3.2ltr diesel
Hi my vin is MNAUMFF50FW402666 as im new to the software im unsure of how it works and where to look to make adjustments
Re: 2015 Ford Ranger xlt PX mk1 3.2ltr diesel
Tyres fitted are 305/70/17 with and od of 864

 Posts: 2
 Joined: Sat Mar 25, 2017 5:49 am
 Vehicle: Ford ranger 3.2L ,2016
Re: 2015 Ford Ranger xlt PX mk1 3.2ltr diesel
hi KyranrKyranr wrote:My XLS came with 255/70/16 tyres. The formula to figure out the nominal circumference of the tyre size is ((255 * 70 * 0.02) + (16 * 25.4) ) * Pi(3.14159). Result is 2398.2898. Multiply that by the conversion factor of 96.7% and you get 2319mm rounded off.
My “As Built” HEX at address 7261201 is 0163 0910 510E. 0163 is the diff ratio and 0910 is the tyre size. If you take 0910 in hex and convert to decimal you get 2320mm so its within 1mm.
So 285/75/16 tyres equal 2533mm. 2533 converted to HEX is 09E5 So when then you write 0163 09E5 51XX into address 7261201 the speedo will be correct. Don’t worry about changing the xx Forscan will calculate the checksum for you.
This does bring up a DTC in the PCM which can be seen with Forscan but doesn’t seem to affect anything.
This is for the MK2 so your address will be different. Try searching your As Built data for "0910" or send me your VIN and I will see if I can work it out.
0163 0910 510E is the mk2 manual.
0175 0910 5120 is the mk2 auto.
so for 285/50r/20 should be 9BB?
is that correct?
 narrco
 Posts: 13
 Joined: Mon Jul 23, 2018 1:42 am
 Vehicle: Ford Ranger Wildtrak (P375/J26E) 3.2 TDCI 2016
Re: 2015 Ford Ranger xlt PX mk1 3.2ltr diesel
Love this formula of your. Will have a look onto this in module and have a try. Since my wheel was 285/75/16 under Auto. Thanks for sharing.Kyranr wrote: ↑Thu Jan 05, 2017 5:41 amMy XLS came with 255/70/16 tyres. The formula to figure out the nominal circumference of the tyre size is ((255 * 70 * 0.02) + (16 * 25.4) ) * Pi(3.14159). Result is 2398.2898. Multiply that by the conversion factor of 96.7% and you get 2319mm rounded off.
My “As Built” HEX at address 7261201 is 0163 0910 510E. 0163 is the diff ratio and 0910 is the tyre size. If you take 0910 in hex and convert to decimal you get 2320mm so its within 1mm.
So 285/75/16 tyres equal 2533mm. 2533 converted to HEX is 09E5 So when then you write 0163 09E5 51XX into address 7261201 the speedo will be correct. Don’t worry about changing the xx Forscan will calculate the checksum for you.
This does bring up a DTC in the PCM which can be seen with Forscan but doesn’t seem to affect anything.
This is for the MK2 so your address will be different. Try searching your As Built data for "0910" or send me your VIN and I will see if I can work it out.
0163 0910 510E is the mk2 manual.
0175 0910 5120 is the mk2 auto.
Sharing each other for improvement!!