Update.
Cleaned the TCU more and more. Went at it with isopropyl alcohol, toothbrush, cotton buds and scraped between tracks where it looked like it might be corroded.
Fitted it two or three times- each time 100% faulty in tip and auto.
Got bored and decided to fix the two damaged brass ferrules on the box that contains the TCU/ ECU and ABS, so at least once repaired, new TCU might stay dry. I cut a slot to screw them in and bedded them with Superglue.
Decided to build it back up properly and just use it in limp mode while trying to find a new TCU. Flooded the TCU with WD-40 and dusted the terminals with a diamond file.
Built it back up.
Decided to enlist some proper help and said a prayer to God that somehow it would work!
Tried it in tiptronic- still knackered.
Restarted and set off in 4th. Went OK! Drove it in tip and in Auto.
All OK! :-)
Don't know if it'll stay fixed, but all OK for now.
Maybe it just wanted attention??
Gave thanks to God! ('Cos I don't think it was me....).
Last edited by Simon Wallwork; 2nd August 2021 at 02:00 PM.
|