FA Cup Champions
Join Date: Oct 2013
Location: United Kingdom
I have to agree with Vengeance, had a very similar issue with mine and then it stopped working altogether, it affects the Speedo. Your problem also tells me it is the ECU as you cant connect to it using the KKL lead. Have you tried Alfa OBD software as well as multiecuscan just as a double check? Either way, it sounds like your ABS ECU but may be not the ABS Pump. I am told it is always the ABS ECU that gets duffed. Interestingly enough, I think the reason why my ECU went is that the brake fluid bottle above the block was leaking and may have affected it...who knows. Anyway, this is what I did:
(1) open bonnet and use your camera phone with lens pointing up to take a picture of the ABS ECU part number and serial.
(2) Look on eBay, Alfa Parts dealer or someone on here to match the part/serial number. I bought mine for £30.
Replacing the plastic ECU unit is easy, there are 6 or maybe 8 screws which are all accessible (the ones at the back are more tricky), disconnect the cable, remove the old ECU and replace. Re-connect the ECU.
Let me know if you want more info