How can I adjust the Throttle Position Sensor on my 3.5

[werminghausen]

I have my TPS open and wanted to adjust it but couldn't find out how this works. I have seen that there are different ones. Mine has no numbers at the 4 leads. I read that there is a switch that has no continuity when throttle is closed and continuity when it opens 0.4mm.
1) I tested with the 2 middle pins at the socket but I am not sure (see pic). If these are the right pins to measure (the two in the middle) then the one lead is connected to the 10 step sliding contact and the second is right next to the constant sliding contact (shown in the upper right of pic 1680).
I can adjust the 0.4mm (when continuity shows up) by turning the unit on the butterfly housing.
If the throttle is completely closed the two points on the bottom right of pic1680 are open....and when I open the throttle slightly then the points close and continuity appears. So with the 2 middle leads at the socket I am measuring the described scenario but I am not sure if this is correct.
If I move the butterfly a bit further then the sliding contact moves to a dead zone and continuity is lost until the next 'tooth' of the 10 contacts is reached. Continuity goes on and off for 10 times until full throttle is reached.
Can someone confirm if I am doing the right thing?

2) On the left side of pic 1680 there are 2 blades which have contact when butterfly is closed and these contacts open approx. when the points of the right side close. The 2 blades can be adjusted with a screw. The question is what is the setpoint when this contact opens?

I am happy if there is someone who could help me here.