I'm not sure how, it's pretty simple mechanically, it's just a flap on a rod
that covers a hole. The actuator pushes against it's internal spring and
pulls the flap away from the hole.
One other thing to check, if this car has a compressor bypass valve is to
see if it's somehow stuck open, the older Garrett turbochargers had a
separate CBV mounted to the left of the timing belt cover, the Mitsubishi
turbos have it on the turbo compressor housing itself.
