17 what is the self-test voltage of Jetta throttle position sensor line 3?

The self-test voltage is about 1.8V, and there are six wires on the throttle position sensor. Lines 3 and 5 are motor lines. When the ignition switch is turned on, the voltage values of the two lines are equal, about 1.8V, and the two lines are controlled by the engine computer through the duty ratio signal. After stepping on the accelerator, Line 3 has been in DC square wave signal, with the highest value of 12V and the lowest value of 0V. When released, the signal voltage becomes 0V.