Does anyone know how I can ceck the haldex pump.
By plugging the car to the computer with the cable under the steering they don't find any errors.

The fb6 fuse is ok.
Pulling it away doing the same test, the problem persists.
Not a good sign I think .

In the case the pum is gone, changing just it, could be enought or is better changing all the haldex?

Well the pump is around £300 and a full Haldex is around £3,000 so, although I am not an expert I this area, if I had a pump problem I would definitely change that first before changing the whole Haldex unit. FL2 HSE Auto Galway Green
Evoque SD4 Auto Blue.
FL1 HSE TD4 Manual Black - Gone.
RR Classic V8 EFI - Gone