There are several sensors on the accelerator, and the answer is here.

1. There are two throttles, one is a throttle position sensor and the other is an idle control valve;

2. It is the signal of throttle potentiometer 1 and the signal of throttle potentiometer 2. When the key door is open (not on fire), the voltage of potentiometer 1 signal is about 4.5 volts, and the voltage of potentiometer 2 is about 0.45 volts. When the accelerator pedal is fully depressed, the signal voltage of potentiometer 1 is about 0.45v, while the signal voltage of potentiometer 2 becomes 4.5v.. These two voltage signals are exactly the process of inversion. An increase, a decrease and an increase.