500 MultiECUscan reset after UniAir change

[Tropicalmike]

Hi
I am going to change out the Uniair unit in my 500 twin air 105 and can see there is advice in MultiECUscan as per below image .
OK so I can do the reset as in the image but it also recommends doing "Uniair actuator dispersion correction" . Anyone know what this is and can it be done from MultiECUscan too ( maybe it has a different title ? ) thanks in advance

 

[varesecrazy]

Hi
I am going to change out the Uniair unit in my 500 twin air 105 and can see there is advice in MultiECUscan as per below image .
OK so I can do the reset as in the image but it also recommends doing "Uniair actuator dispersion correction" . Anyone know what this is and can it be done from MultiECUscan too ( maybe it has a different title ? ) thanks in advance
View attachment 445266

@puntodeltathema

May have the broadest experience of the Regulars on here..

 

[s130]

You need to scroll down the page. 'UniAir actuator dispersion correction' is 3 from the bottom in MES V5.2 just before 'Neutral signal learn'.

 

[puntodeltathema]

Thanks for the tag. That procedure only seems to feature on the Euro 5 cars - and I think not all of those cars have the facility either. I remember trying it on a 2011 Euro 5 and found the correction wasn't enabled in the ECU. So I wonder if it was an early thing that they later decided wasn't needed.

(All the 105s were Euro 6 I believe...)

By the way, I'm sure a writeup of the replacement would be welcome, as I suspect there will be a growing need for this in the coming years!

 

[steveras57]

Thanks for the tag. That procedure only seems to feature on the Euro 5 cars - and I think not all of those cars have the facility either. I remember trying it on a 2011 Euro 5 and found the correction wasn't enabled in the ECU. So I wonder if it was an early thing that they later decided wasn't needed.

(All the 105s were Euro 6 I believe...)

By the way, I'm sure a writeup of the replacement would be welcome, as I suspect there will be a growing need for this in the coming years!

Or tomorrow!

 

[s130]

Thanks for the tag. That procedure only seems to feature on the Euro 5 cars - and I think not all of those cars have the facility either. I remember trying it on a 2011 Euro 5 and found the correction wasn't enabled in the ECU. So I wonder if it was an early thing that they later decided wasn't needed.

(All the 105s were Euro 6 I believe...)

By the way, I'm sure a writeup of the replacement would be welcome, as I suspect there will be a growing need for this in the coming years!

Not sure what you mean about "writeup of replacement". Are you referring to the replacement of the Uniair unit? As for MES I was referring to the only 0.9 Uni Air 500 listing where the 'UniAir actuator dispersion correction' is listed in MES. Are you using/choosing a different vehicle?

 

[Tropicalmike]

Thanks for the dialogue back on this Guys , very quick and helpful
I have now looked in the other version of the engine available for the 500 0.9 Turbo Twin Air ( IAW 8GSF CF5 ) in simulation mode in MultiECUscan and can see it . So hopefully not required for my engine ( IAW 8GSW CF6 ) .

I was thinking of taking a few pictures and notes when I change the UniAir out and creating a guide for the forum . I have been going through the Fiat E-learn-WEB FCA at https://lab-aftersales.fiat.com/elearn/ for information on the UniAir . Once I had got a handle on finding my way around the website and entered my VIN I was very pleasantly surprised just how much info there was available for "Joe public" , both on fault finding and the procedures for changing it . I also found the full electrical diagrams for the car and detailed descriptions on the engine. The only limitation is MultiECUscan is probably not 100% equivalent to the FIAT diagnostic computer and they also mention other special FIAT test tools and test plug connectors that wont be available . If you haven't looked at E-learn before it is well worth it.

 

[Tropicalmike]

Thanks for the tag. That procedure only seems to feature on the Euro 5 cars - and I think not all of those cars have the facility either. I remember trying it on a 2011 Euro 5 and found the correction wasn't enabled in the ECU. So I wonder if it was an early thing that they later decided wasn't needed.

(All the 105s were Euro 6 I believe...)

By the way, I'm sure a writeup of the replacement would be welcome, as I suspect there will be a growing need for this in the coming years!

I have looked at the Fiat e-learn WEB manual again about removing the rocker cover and was gutted to see it says remove the inlet manifold/air box and to do this the AC compressor needs to come off too after removing AC gas. This needs the right front wheel and arch liner off for access . Any experience/advice with this access to the UNIAIR would be much appreciated . Changing the Uniair itself looks OK it is just all the removals to get to it !!!
Thanks

 

[steveras57]

I have looked at the Fiat e-learn WEB manual again about removing the rocker cover and was gutted to see it says remove the inlet manifold/air box and to do this the AC compressor needs to come off too after removing AC gas. This needs the right front wheel and arch liner off for access . Any experience/advice with this access to the UNIAIR would be much appreciated . Changing the Uniair itself looks OK it is just all the removals to get to it !!!
Thanks

thats cause the factory robots get an engine/chassis and then bolt the rest of the car around it! good for profit - not so good for maintenance afterwards
What? they should have designed it so it can be worked on by the owner! now your just being stupid it was designed( but not built by them!) by ITALIANS you know! -(form over function an all that!) you wanna da practical! bya da van!.