How to detect the throttle position sensor with linear variable resistance output

Detection of Structure and Circuit of Linear Variable Resistance Output Throttle Position Sensor (1) The linear variable resistance throttle position sensor is a linear potentiometer, and the sliding contact of the potentiometer is driven by the throttle shaft. Under different throttle opening, the resistance of potentiometer is different, so the throttle opening is converted into voltage signal and sent to ECU. Through the throttle position sensor, ECU can obtain the voltage signal representing the continuous change of all throttle openings from fully closed to fully open, and the change rate of throttle opening, so as to judge the working condition of the engine more accurately. Generally, there is also an idle contact IDL in this throttle position sensor to judge the idle working condition of the engine. . (2) Inspection and Adjustment of Linear Variable Resistance Throttle Position Sensor ① Detection of idle contact continuity. Turn the ignition switch to the "OFF" position, unplug the wire connector of the throttle position sensor, and measure the continuity of the idle contact IDL on the throttle position sensor connector with a multimeter Ω. When the throttle valve is completely closed, the IDL-E2 terminal should be connected (resistance is 0); When the throttle is open, there should be no conduction between IDL-E2 terminals (resistance is ∞). Otherwise, replace the throttle position sensor. ② Measure the resistance of linear potentiometer. Turn the ignition switch to the OFF position, unplug the wire connector of the throttle position sensor, and measure the resistance of the linear potentiometer with a multimeter Ω. The resistance should increase linearly with the increase of throttle opening.