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Post by dmccook on Apr 9, 2022 2:57:20 GMT
Hi, I am trying to adjust my speedo calibration on my new 2022 T6.1 Transporter, using the long coding for Control Unit 17. OBDEleven lists two wheel circumference values. - wheel_circumference and - wheel_circumference_gen2 Can anyone confirm what these two values are, and why there are two and which one will change the speedo reading? I found this thread which suggests that one value is the average circumference and one is the maximum circumference. www.t6forum.com/threads/t6-1-speedo-adjustment-for-larger-wheels.31423/page-2I'd really like to be able to confirm what the circumference values are in mm for each of the coding variables. Is it possible to display the advanced measuring values using OBDEleven, in the same way as VCDS? Many thanks in advance for any help providing. Cheers, David.
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Deleted
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Post by Deleted on Apr 14, 2022 9:03:44 GMT
I do not recommend changing anything here, you can only do a one-time coding here, then it is locked. I changed the wheel code and now have problems with Acc.
VW can't seem to help either
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Post by dmccook on Apr 21, 2022 23:35:33 GMT
That’s a bit of a worry. I have actually changed Circumference and Circumference_2 several times without any problem, except circumference would only change if I opened the bonnet.
I’m not keen to keep testing unless I can identify what mm values correspond to each entry.
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Post by MartiniB on Apr 18, 2023 13:46:28 GMT
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Post by ascotvan on May 1, 2023 1:50:05 GMT
That’s a bit of a worry. I have actually changed Circumference and Circumference_2 several times without any problem, except circumference would only change if I opened the bonnet. I’m not keen to keep testing unless I can identify what mm values correspond to each entry. I have posted the mm values for each of the Wheel circumference Variant (Byte 3, bit 0-2) values, except for 7, here: www.t6forum.com/threads/t6-1-speedo-adjustment-for-larger-wheels.31423/post-567355However, I would like to know the effect of changing Wheel circumference2 Variant (Byte19, bit 0-4), if anyone can help with that? Can you confirm you have been able to change Wheel circumference Variant to a smaller value on a T6.1 VW Transporter, by opening the bonnet?
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Post by dmccook on May 1, 2023 2:49:02 GMT
I did change Circ and Circ2, just using adaptations, but Circ seemed to make no difference for me and now i have larger tyres so I’ve changed circ2 back to the original settings so my speedo is almost exact. I have had to open the bonnet to make some changes.
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