Quote:
Originally Posted by MikkiJayne
Having cleaned it up and put it back in, I was checking the shifter alignment yesterday using VCDS. Between P & R and R & N the TCU shows 'Z1' and between N and D it shows 'Z2' so those intermediate contacts definitely tell it something different. Presumably its so it can prepare for what is coming next - it apparently can't tell direction, since it can be put in to Z2 from D, and then put straight back in D, but I guess it uses the Z positions to prepare the gearbox for what may come next.
I didn't get the binary code for Z, but that can probably be worked out from the contacts, or observing VCDS again.
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Excellent research.  I think that's consistent with what I worked out and documented in post #16 above.  Z1 = 1100, Z2 = 1010.
There should be another code for between D and 4/S. And a 4th code for 4-3 and 3-2 if have that available.
So we do now know that those intermediate positions exist and are recognised by the TCU, though not if it does anything (or what) as a result.
This could be the basis of another useful diagnostics test on the F125, moving the shifter slowly and monitoring the TCU.
Where exactly in VCDS do you find those codes?
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Last edited by HPsauce; 12th September 2020 at 09:31 AM.
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