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| D2 - Transmission Gearboxes, diffs, drive shafts. |
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#1
31st July 2021, 04:28 PM
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Thanks MikkiJayne. I'd best have a look for water ingress then. But where is this electronics box?
I can confirm that the fault does not come when you move the lever. Only about 100 yards after you move off. The car has been here in warm, dry Bulgaria for a few months, but before that it stood outside in Scotland unused, for 18 months. There was some water ingress to the boot, caused by a perished bung, in the boot gutter side. Is there anything in the boot that could cause this? 
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#2
31st July 2021, 04:54 PM
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The electronics box is the black plastic lump at the base of the screen on the left. There are a bunch of philips screws holding the lid on which are almost certainly seized in place if it's sat for that long, but worth a try. The TCU sits at the top and is not water-tight, unlike the ECU, so has a tendency to be the first in line for condensation damage. Its a bit of a pain to get to, but if you can remove the connector its worth looking for corrosion there first and giving it a spray of WD40. Sometimes that will help it, but sometimes there is internal corrosion too. Have a look for my General Vod workshop thread - I show the process in there. That one got scrapped for a blown gearbox whereas in fact it was just water-borne deposits on the TCU pcb. I cleaned it with isopropyl alcohol and a toothbrush and let it try overnight and it worked perfectly  Btw, I sell replacement boot grommets here: https://www.ebay.co.uk/itm/153918842338 
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#3
1st August 2021, 01:54 PM
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Hi Mikki.
Ok, I'll have a look in that box for water etc. I need a couple of those grommets, so will buy as soon as I have a UK shipping address. We are in Bulgaria and shipping anything here from outside the EU is a pain. Sorry for late response, last night we had a major storm here and lightning must have struck the mast-thus no internet. I'm just relieved that its not 'curtains' mechanically for the box....yet. I really like this car.
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#4
1st August 2021, 02:09 PM
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Ok. got the lid off and it's clear there has been moisture in there. very light rusting of steel parts, and typical alumium corrosion, but not much.
I take it the engine ECU is nearest the wing and gearbox item nearest the middle of the car? It is. Getrieb = transmission! Last edited by Simon Wallwork; 1st August 2021 at 02:50 PM.
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#5
1st August 2021, 04:07 PM
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Oh dear.
Scooshed some WD-40 in there, and refixed the cover- seeing as the fault had gone away. Took it out on the road and not only is the fault back, but it also does it in tiptronic now too! I guess next step is remove the TCU and clean its insides?
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#6
1st August 2021, 04:23 PM
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How the heck do u remove the TCU wiring connector???
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#7
1st August 2021, 05:59 PM
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Just picked up on this thread - 37 degrees in Langbank - really?
__________________
2002 Final Edition S8. Ebony black with Silver Grey leather and myrtle wood trim. Current mods: solar sun roof, 20mm rear spacers, 15 mm on front, red brembo callipers, 6k headlights, rear view camera, engine remap, alloy dash dial rings, alloy navi rings, tt/phaeton pedal upgrade, (and custom matching foot rest) dension ipod interface & parrot hands free kit (both fully hidden), av input, tv in motion switched thro' PF switch in blanking plug right of steering column, Audi 'quattro' sill covers, repositioned centre console switches, radio clock, .Planned mods: auto-dimming rear view mirror, dash cam (as steamship's), fit the ski hatch, refit philips drl's (or maybe not - nope, definitely not - horrible botch!).
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#8
1st August 2021, 08:52 PM
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Hybrid Mode
