Awd control unit 22

[s5joe]

I have tried to connect to my Awd control unit to check my temp before doing a haldex service and my Vcds is saying it cannot connect to this. I have had a look at the fuse is says it is and there is no fuse there and than it look like there is only one side of a connection in there available footwell c8 is says it is. It is on a 2018 S5

 

[AlS3BE]

S5 doesn’t have a haldex controller. Only the a3/s3 had it.
S5 has has a mechanical centre diff as far as I’m aware.

 

[s5joe]

S5 doesn’t have a haldex controller. Only the a3/s3 had it.
S5 has has a mechanical centre diff as far as I’m aware.

How come they do a service on them and here is a link that shows it??

How to Service Haldex Generation 5 Full Guide – VW, Audi Specialists Leeds

www.jcr-leeds.com

 

[AlS3BE]

How come they do a service on them and here is a link that shows it??

How to Service Haldex Generation 5 Full Guide – VW, Audi Specialists Leeds

www.jcr-leeds.com

S5 isn’t on the list.
S3/rs3 is.

 

[s5joe]

S5 isn’t on the list.
S3/rs3 is.

What controls the Quattro system.

 

[AlS3BE]

It’s permanently running through a mechanical centre differential. Awd is permanently on.
Haldex systems only turn back wheels when slip occurs otherwise they are fwd.
maintenance will be like any other diff so old will need changed and most likely part of the gearbox service as centre diff is probably built in the gearbox.

 

[s5joe]

It’s permanently running through a mechanical centre differential. Awd is permanently on.
Haldex systems only turn back wheels when slip occurs otherwise they are fwd.
maintenance will be like any other diff so old will need changed and most likely part of the gearbox service as centre diff is probably built in the gearbox.

That will make sense that now. Thanks for explaining it too me as it seems a lot don’t know the setup of the drive chain.