Thanks. I've been looking on Ebay but can't find one of the corresponding part number. The ECU specialist who have told me the existing unit is unrepairable told me that the Sporting ECU is different from others, even though all the 1100cc units are 54hp apparently. The ECU on my car is a Magnetti Marelli unit but has very limited info on it - (see picture)(much less than on others I've seen advertised). The local Fiat agent told me the original part number(46817822) has been superseded by a later number (46820325), but that neither is available from Fiat now. As far as I can see, none of the parts currently on ebay have either of these numbers. There are plenty of second hand and 'virginised' ones advertised but with different numbers. Chat on here seems to imply they are more interchangeable than I've been told but frankly, I can't afford to risk the costs of a part/repair that doesn't work.You can still get new ones from Poland, Lithuania, Rumania and Hungary, most used to advertise on eBay, those that still do still export to UK
It certainly does. Getting desperate now!
Thanks. I've contacted the seller to see if the part numbers match.FIAT SEICENTO ECU & IMMOBILISER | eBay
<p>FIAT SEICENTO ECU & IMMOBILISER. </p><p>All questions welcome </p>www.ebay.co.uk
doesn't seem to state engine size but i'm pretty sure any seicento with this style ecu will be 1.1
From what i've read these micro ecu's can suffer with ignition coil driver circuit failure.
Yes, that seems to be the common fault. The existing unit failed during the MOT. The car drove there with no issues and then whilst on the ramp awaiting the emissions test, it suddenly overheated. The engine fan didn't cut in. It did the same at test the previous year but re-started after. I'd noticed the fan wasn't coming on and the temperature light did come on briefly once in traffic but went off as soon as we were moving. Several times through the summer I was caught in heavy traffic and stationary for ages with no light coming on or any sin of over heating. There's no indication of a head gasket issue so I'm thinking the coil driver issue has blown the whole ECU and hence the fan control, leading to the overheat. I also wonder if the garage jump started the car (as they didn't get round to it immediately and the battery was very weak) and that may have done for the ECU.FIAT SEICENTO ECU & IMMOBILISER | eBay
<p>FIAT SEICENTO ECU & IMMOBILISER. </p><p>All questions welcome </p>www.ebay.co.uk
doesn't seem to state engine size but i'm pretty sure any seicento with this style ecu will be 1.1
From what i've read these micro ecu's can suffer with ignition coil driver circuit failure.
yes, being a 2000 it will be a very early mpi engine - and they had so many issues with them. The ecu was replaced pretty quickly with one that doesnt just randomly blow up.Yes, that seems to be the common fault. The existing unit failed during the MOT. The car drove there with no issues and then whilst on the ramp awaiting the emissions test, it suddenly overheated. The engine fan didn't cut in. It did the same at test the previous year but re-started after. I'd noticed the fan wasn't coming on and the temperature light did come on briefly once in traffic but went off as soon as we were moving. Several times through the summer I was caught in heavy traffic and stationary for ages with no light coming on or any sin of over heating. There's no indication of a head gasket issue so I'm thinking the coil driver issue has blown the whole ECU and hence the fan control, leading to the overheat. I also wonder if the garage jump started the car (as they didn't get round to it immediately and the battery was very weak) and that may have done for the ECU.
Thanks. I contacted the uk seller on EBay who had an ecu/instrument cluster and ignition barrel for sale to ask what the part number was. All that came back was 'sorry we cannot help'. I don't know if this means the item is not the right part number, they don't know or can't be bothered to look, suspect the latter!and just as a side point, try looking on polish and italian ebay if you want to just find replacements - I've had great success sourcing ecu's and engine looms etc from them in the past. Actually have a loom for a mk1 punto sporting here from italy and a ecu, lockset, immobilser etc from a polish dude so i can put a 1.2 16v in a cinq. Theres a lot of cool cento people in facebook groups as well, as much as i loathe facebook groups
That's interesting. Nobody (except the unhelpful UK ebay seller) is advertising the ECU with the locks/instruments but there are loads of sellers offering just the ECU itself(used). This seems strange if a used unit is effectively paired to the car it came from and can't be reprogrammed to another car's keys/instruments. There are some Polish companies that still advertise the new part but when you look they say 'no stock'. I've seen a couple described as 'virginised' which presumably means the link to the donor vehicle has been erased and it should pair to my car, but my local ECU guy says i't only 50/50 whether this will work. All a bit of a gamble. I was hoping someone on here might want the car for the scrap price (it's in such good condition) and try to repair it, but if not, it looks like it will have to be scrapped.No both part numbers will both be the "micro eco" that fails, they will have done a firmware update or something.
I don't know the ultimate can do and can't do when it comes to immobiliser stuff - what i do know of this era of fiats is the ecu, immobilizer and key all have to match, you can't use the codebox and key you have with a different ecu. You can copy seicento keys, but i don't know if you can read the ecu and then code a new key to it - best call a local car key specialist on that front.
What i have alwasy tried to do is get a ecu, codebox and key from the same donor car - if you can get ignition barrel and door locks as well then you can swap them and only have a single key still. Without the ignition barrel you need to tape the matching key to the codebox antenna and not have the antenna round the ignition barrel so it picks up the right key - can stuff this up behind the dash then, but in turn means you don't really have an immobiliser anymore.
this isnt an option but had you got a new ecu from fiat how this works is it has no immobilser until you plug one in and it codes to that - known as a virgin ecu. very unlikely you will find a new virgin micro ecu but thats how this would have worked had the car been new still.
speedo wise, this is fine, the difference is the fascia not the clocks or ecu, the ecu records km in a uk car if i remember correctly.