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Got the trans ECU back today with a staggering £268 bill attached.
Which gave me a bit of a lump in the throat, not helped by the proprietor telling me that he was retiring next year. So any other problems I get along these lines will be effectively insoluble. Nobody to fix them!
If this DOESN'T work, not only will I be out a big a wedge of money, i'll also be out of ideas. Think the only solution then, or in any future electronics failure in the trans, will be to go back to a manual trans. Not difficult, let alone impossible, just frustrating!
Will be swapping the ECU out over the weekend, watch this space!
Steve
Did you double check the pins for correct input and outputs? It's easy to destroy a new or repaired ecu in seconds when it's just a faulty pin signal.
Jeroen
How I did it in the first place was to remove the entire loom from the donor car and strip all the looming tape off. Then, starting at the 4 plugs from the engine (2, brown and white) transmission (blue) and ECU (black) I carefully traced each individual wire to it's destination in the car making only a single cut in each to remove it from the loom and rejoining each one in turn with "chocolate block" screw joiners outside the loom as I went. I never had more than 1 cut wire at a time to deal with so I couldn't get it wrong. I took great pains to stagger the cuts so there wouldn't be a whole load of joints in one place. The process got though more than 150 individual block connectors, 2 bags of 4" cable ties and literally weeks of laborious work!
Once I had this pared down assembly lying on the bench with all the leftovers elsewhere. I offered it up to the car front end loom that I had already modified to my needs to get an idea of lengths, position of units and shape and then, again working a single wire at a time, shortened and permanently joined each wire together, finally taping up the completed loom. But the engine/trans loom is a separate entity to the car loom, with just a couple of plugs interfacing the 2 looms to make it "plug and play", 1 under the bonnet by the relay box and another below the dash.
The mistake (AFAIK the ONLY mistake) came from me not being able to satisfactorily trace the path of the trans ECU/Sport mode warning light wire through the PCB on the Omega dash. So, in this ONE case I guessed and what I guessed was that the other side of the bulb was earthed. It was a dash light, what else would it be, other than an earthed bulb, right? WRONG!
I'd already decided to use the redundant choke warning light segment in the cluster as the sport mode /ecu warning and spent some time altering the cluster's board to be an earthed bulb rather than a fed one as it is originally. I should have left it as it was, would have been perfect!
The upshot was, that once everything was connected up, the first time I switched on the ignition, there was a "pop" from the trans ECU and nothing connected to it worked properly. I walked away for several weeks in disgust and frustration!
I may be many things, but a quitter I am not! So once I got over my fit of pique, I turned to finding out what i'd done wrong. I already had a Haynes manual for the Omega, but it's 30 odd page paper wiring diagram was difficult (impossible without a magnifying glass) to read and horrible to interpret. I sought out and found a downloadable wiring diagram (and masses more) which was interactive for a mere £7.
There's no doubt I should have got one of these in the beginning, if i'd known they existed, I would have! I'm completely sure the wiring diagrams are designed to be used this way, it made everything simple. So simple that I was able to check everything i'd done and almost immediately find the mistake.
Correcting it was even easier, as I just subbed a spare standard W/L cluster board for my modified one.
But I still had a blown ECU and the price quoted by the wizards to fix it (along with dire warnings that it was matched to the car) made me want to a least TRY a second hand one which I found without trouble on ebay for £30. And this is the one the car is running currently, with all it's shifting problems and that anoying false neutral.
Are the problems down to the trans ECU i'm presently using not being matched to the car? I hope so! Are all the wires in the right places? As far as I can tell, YES!
Steve