What is the use of the sensor on the throttle position of EFI motorcycle?

There is a throttle position sensor, also called throttle opening sensor, which converts your intention into an electrical signal that ECU can understand. ECU adjusts the fuel injection quantity according to the signal of the throttle sensor and the signals collected by other sensors, and controls the power output of the engine. The throttle position sensor is essentially a variable resistor and several switches, which are installed on the throttle body where the carburetor is installed on the motorcycle. Of course, for EFI motorcycles, there is no carburetor, but a throttle instead. If you suspect that this sensor is faulty, how can you judge its quality? Let's summarize several common detection methods of throttle position sensor.

What is a linear variable resistance throttle position sensor? It is essentially a linear potentiometer, and its sliding contact is driven by the throttle shaft. Under different throttle opening, the resistance of potentiometer is also different. With the change of throttle opening, the resistance will change constantly, thus converting the throttle opening into a voltage signal and providing it to ECU for reference.

Through this sensor, the motorcycle driving computer, that is, ECU, can get all the voltage signals of the throttle opening from fully closed to fully open in time, and the change rate of the throttle opening, so as to judge the driver's intention more accurately and change the working state of the engine accordingly. In the linear variable resistance output throttle position sensor, there is also an idle contact IDL, which is used to determine the idle working condition of the engine. The inspection and adjustment of the sensor can be carried out as follows.

Measure the resistance of a linear potentiometer. Turn off the ignition switch, unplug the wire connector of the throttle position sensor, and measure the resistance of the linear potentiometer with the Ω range of the multimeter. The resistance should be linear with the increase of the throttle opening. If there is no change or the change is not smooth, it should be regarded as sensor damage.