The compensator works with the added weight in the rear. Another name for it is a Load Sensing Valve (LSV). The more weight that is in the rear, the more the compensator opens thus more pressure/fluid to the brakes.The brakes on my van after wintering were poor so after changing master cylinder etc eventually got down to the compensator
At the moment am waiting for the manual but i think the compensator is us have lubricated the compensator but am not sure how it works. I think the manual will come tomorrow so i may be able to make sense of it then but i thought if it dosent work
its not a big job to bypass it
the load load sensor valve is at the rear and should be checked by the tester to see if its free.not sticking up for your test but compensator wont actualy be tested, its the brakes that are tested and he may or may not have seen it but if it passed the required braking force then its a pass the same as they cant remove stuff to see something eg belly pan fited to some t2s all the beake pipe goes under it and all the chasis but they cant remove it to see the big holes in the floor etc LOL: and as we all know as soon as you drive out of the mot bay the cert is just a piece of paper, but should have realy pointed out that it looked seized.
one of the new things thats been tried at our local test station is people claiming that damage has been done to there car while it was been tested, even though the damage was noted to the cills before the car was put on the ramp, and also the ramp is a drive on ramp not a two post type but they still insisted that the damage was the testers fault,