Sorry to revive such old topic, but I just became really interested in it a short time ago, and I didn't see fit to start a whole new one, when it's been brought up so many times.
I have a 1997 1.9JTD Alfa 156, which is the pre-facelift version, interior and exterior. A picture of my ECU is attached below.
From what I have read on previous posts, you can't retrofit cruise control on a pre-facelift interior version, which made sense at first, as the ECU's weren't even alike (notice how pins up to 77 are mentioned, whilst my ECU only goes as far as 52 and is divided into five blocks, from A to E). However, not all hope is lost, yet.
Forum member "Alecto28", you mentioned at the beginning of this post that your 156 is pre-facelift interior and exterior, and that you managed to retrofit it. Is this correct? How on earth did you do it?
I have tried looking at electronic diagrams to try and match the pins from one ECU to the other, but the info I got was just too uncertain, and ECUs are not to be messed around too much with. Is it a matter of wiring the switches to the correct pins? Is any firmware flash necessary?
Forum member "DieselManiac", you mentioned it was as easy as to flash the Lybra firmware and pull another brake switch to feed the ECU with 12v when the brakes are engaged, but where does the wiring go in the ECU? Won't the Lancia ECU maps be different from Alfa's?
Maybe the problem is that nobody was ever really referring to my ECU, and that everyone was talking about the more modern one from the beginning... Could this be? From what I know, my type of ECU was replaced when the interior facelift came out in 2002. Has no one ever retrofitted it on a pre-facelift interior version?
Please tell me if there's no hope for me. I'm really interested in this, and it's really getting on my nerves
Thank you all in advance.