[Mk2] [Turbo] A 'what does this do' air hose question

[dex]

The cast aluminium pipe that connects the turbo to the intercooler on the rev 3 turbo has a take off boss cast just below the dump valve, from this a small bore hose it fitted; Does any one know what this hose is for and what it should be connected to?

Thanks.

[3sgte]

it goes to the aircon idle up vsv which iirc is next to the injector resistor pack
the other pipe to this vsv goes directly to the back of the inlet manifold

[dex]

Ah, so it's a re-route on the rev 3. On the rev 1/2 this take off is from the breather going back to the induction system before the turbo.

Cheers