Auto distance problems
- Thread starter Samfisher
- Start date
Hey mmi, just while you’re there !!!! I always get that and 
. But anyway!! I did see a post about clutch wear can you give any indication on my clutch condition?? I have got to do the DMF soon before it explodes!! Obviously the clutch is a different beast. Thanks for your time and help so far by the way 
. But anyway!! I did see a post about clutch wear can you give any indication on my clutch condition?? I have got to do the DMF soon before it explodes!! Obviously the clutch is a different beast. Thanks for your time and help so far by the way 
Thanks for the files. Well, the controllers seem to work as expected.
Hmmm, front tyres would make the speedo underread -8.1% compared to factory tyres (205/65-16). There is also 1.6% difference between front and rear axles.
I'm highly confident that the front radar also measures speed internally - being a doppler radar.
Have you adjusted the speedo to display correct speed?
In the thread below it is suggested that big wheels possibly confuse front radar
But then it has been assured that big wheels won't cause any issues
Well now I’m confused 
doesn’t take a lot 
So the wheels and tyres have been on the van a couple of years now and this is only a recent thing ?? I haven’t changed anything regarding the Speedo but do want to but was unsure of what was the correct process ?
How did you know what the coding was for the radar from factory ? What would you recommend doing now ?
doesn’t take a lot So the wheels and tyres have been on the van a couple of years now and this is only a recent thing ?? I haven’t changed anything regarding the Speedo but do want to but was unsure of what was the correct process ?
How did you know what the coding was for the radar from factory ? What would you recommend doing now ?
Just my guess - based on quite a few (hundred or so) VCDS Scans of T6 - DSG and towbar seem to be factored in, nothing else affecting on T6 - thus only few different codings has been used.
Also I wouldn't expect there would be a unique/secret coding for your van.
Yes, I would start by changing the radar coding, or the speedo - not both at the same time - just to learn
Well, that's just a theory that it's the wheels. Certainly the tyres wear... if it has been just on the edge....
T6 is an easy one
Module 17 – Instruments carries also the coding to select a few scaling factors for speedometer.
Byte 0, bits 0..3 have mysterious value “K-number”. It turned out changing this coding adjusts measuring values IDE00842 (K-number) and IDE00845 (Wheel circ. mm) of module 17 - Instruments, and thus adjusts speedo scaling.
I run through all the above coding combinations 01-07 and read the measuring values for each coding combination. The results are in the table below.
Speedo can be adjusted simply by changing the coding. Resulting speedometer delta (vs...
Byte 0, bits 0..3 have mysterious value “K-number”. It turned out changing this coding adjusts measuring values IDE00842 (K-number) and IDE00845 (Wheel circ. mm) of module 17 - Instruments, and thus adjusts speedo scaling.
I run through all the above coding combinations 01-07 and read the measuring values for each coding combination. The results are in the table below.
Speedo can be adjusted simply by changing the coding. Resulting speedometer delta (vs...
Ok so radar settings didn’t have an effect on the issues but the coding for the speed did.
Now I have no messages from the radar and no implausible data from the abs
The K number was at 1 and I changed it to 3 and it’s quite accurate with a gps speed reading.
Thank you kindly mmi for all your help
I’m so glad I didn’t have to repair the gearbox!!
Now I have no messages from the radar and no implausible data from the abs
The K number was at 1 and I changed it to 3 and it’s quite accurate with a gps speed reading.
Thank you kindly mmi for all your help
I’m so glad I didn’t have to repair the gearbox!!
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