AUDI TT 225 haldex controller

[TTNUNNY]

Hi all
having a problem with haldex controller ... when ignition is switched on the haldex clicks and keeps clicking. with esp light on, on the dash,
I know about the wiring harness issue's with the tt and sensors ect.

I think its just the controller that's at fault but my question is,
as I've never fitted one before,
when fitting replacement haldex is it possible to fit it without draining oil with it being a separate unit ? or will I have to drain oil then do it as I only want to see if it is the controller at fault as I have a spare here. any help would be appreciated
thank
nunny

[SuperchargedVR6]

You will lose a bit of Haldex fluid and make a mess if you don't drain it first, so yes, it's sensible to drian it before you start. Have a new tube of Haldex fluid, a filter and a controller gasket on standby.

Removing the controller is a pig on the drive. One of the two 5mm hex bolts is a real swine to get at.

Before you even get the spanners out, fault code the ECU first with VCDS. It might even be something as simple as a faulty handbrake or foot brake switch.

[TTNUNNY]

many thanks gonna tackle it this week end weather permitted