What is the function of the throttle position sensor?

The function of throttle position sensor is to detect whether the engine is in idle or load state, acceleration or deceleration state. Symptoms of throttle position sensor failure are: 1, too high or too low idle speed; 2, the idle speed is unstable, and the idle speed is easy to turn off; 3. Engine jitter during acceleration; 4. Accelerate the response delay; 5. The engine appears intermittent jitter during operation. The method of measuring the throttle position sensor is: 1, detect the power supply voltage, unplug the connector plug on the throttle position sensor, turn on the ignition switch, and measure the voltage values between vcc and idle contact, vcc and throttle fully open contact respectively; 2. Check the resistance, unplug the throttle potentiometer, and measure the resistance between vcc and idle contact and vcc and vth.