Remove the connecting plug of the throttle position sensor and measure the resistance with a multimeter. The resistance between the signal output pin of the sensor and the grounding pin is connected and slowly changed at the same time. The opening of the throttle valve should be changed. The valve opening increased continuously, and there was no sudden change.
Use a multimeter to measure the resistance between the idling contact (IDL) signal terminal and the ground terminal of the sensor. When the throttle is closed, the resistance is 0 ohms. The throttle should be opened from a small opening to full opening. Is infinity.