AAN Vs ABY ECUs?

[Error404]

Are they the same functionally, i.e. will an AAN ECU work with an ABY loom?

[Ian Simmonds]

I hope so, we have run the Rallywreck (AAN V2 Spink) on the S2 MTM ECU for testing without issue....

[Rocco]

Are they the same functionally, i.e. will an AAN ECU work with an ABY loom?

i have and had a 3B wiring loom working with AAN and ABY ECUs... all the same


i have a ABY wiring loom with AAN and ABY ECUs... works perfectly

[AndyP]

I ran my old UrS4 on a homefried ABY ECU.

[Error404]

That's cool then, I have an AAN ecu here supplied by a forum member, we thought it was an ABY one but I checked the p/n and its actually an AAN, but as long as it works plug & play with an ABY engine loom its happy days

cheers lads

[prj]

Will work fine, but watch out for "551A" AAN ECU's from the early UrS4-s which had a pseudo dizzy.
They have a 87C64 inside instead of a 87C257 boost chip. Those are a bitch to emulate, and there are few programmers that support them.

They will work fine, but a lot harder to tune, shall you want to.

[twoqu]

And of course if its an immo ecu it won't work unless you either un-immo it or use the appropriate immo box!

[Error404]

the VAG P/N is 4A0 907 551 AA, Bosch 0 261 200 456/466 from 11/08/1993
Will that be ok?

[prj]

And of course if its an immo ecu it won't work unless you either un-immo it or use the appropriate immo box!

Uhm, "appropriate immo box"?

1. If your car does not have immo, you will need to de-immo the ECU.
2. If your car does have immo, you can use a de-immoed ECU OR you can use any immo-ed ECU after adapting it with VAG-COM. Takes about 30 seconds.

ABY and AAN ECU-s are compatible with ABY and AAN immo boxes and vice versa.
You just need to adapt the ECU to the box when doing a swap, that's all.

[prj]

the VAG P/N is 4A0 907 551 AA, Bosch 0 261 200 456/466 from 11/08/1993
Will that be ok?

551 AA is OK, that is a late UrS4 ECU, and it does not have immo.

[twoqu]

Check what car he has!
If he is retro fitting a Motronic, what I said was correct.
If he already had an ABY he would not need either an ECU or indeed a loom!
As the ecu is unimmo its not a problem.

[Error404]

good news. yes retrofitting so no immob is perfect for me

thanks guys

[prj]

Just read the topic title, that's all.
Was not trying to have a go at you twoqu, sorry.

Immobox is a pain in the **** anyway, easier to just get it de-immo'd, but you don't need to do this, as it's a non-immo ecu

[varia]

Bumping an old topic up, is the ABY and AAN (late) ecu the same?
I believe ive read somewhere the map is different cos the weight of the cars.

[butchone]

i have and had a 3B wiring loom working with AAN and ABY ECUs... all the same


i have a ABY wiring loom with AAN and ABY ECUs... works perfectly

3b ecu work on AAN and ABY?