![]() ![]() So nothing available there.Ĭlick to expand.Yes, the main question is which one you need to read “more correctly” with new wheels, speedometer or odometer. Yes, correct, the “out of range” means that the controller does not accept those coding values. Just a note that the change affects also odometer reading, and thus your fuel consumption readings - improving them, as seemingly you are doing more miles. At speedo reading 50 your real speed is 51. The correction by +7.8% would make your speedo very optimistic – showing about 53 when actually doing only 50.Ĭurrently with your bigger wheels I think that your speedo under reads about 2%. Speedo reading would be about 2% more than actual speed – at speedo 51 when real speed is 50. So for you the setting +4.0% definitely would be better match – taking away some of the EU tolerance. They have been reading 103 when real speed is 100 with factory wheels. I have observed about 3% error in T6 vans. I think EU regulations has forced speedos read over a little. Īs “” tells that speedo error is -5.18% your wheels are significantly bigger than factory wheels (also revealed by your avatar) – so the correction choices (if table 2 applies to your van) at first glance would be +4.0% or +7.8%. Thus giving actually a couple of choices for bigger wheels.įor smaller wheels – use "-" values of table, unfortunately not much to do. So changing (table 2) coding from factory setting “4” to “3” will just make my speedo read more – at certain speed at factory setting "4" speedo would read 100 units and after coding to “3” speedo would read 104 units at the same speed.Īnyways, the bottom line is that for bigger wheels you need to make speedo read more, that is “+” values in the table. ![]() In the tables above my simplified approach was to look only how coding change affects speedo reading. Yes, the challenge is not to get confused with speedo reading, correction, speedo error with new wheels, etc. Of course the coding change can be done with other tools, too.
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