How to Test the Throttle Position Sensor?

[MasonLee]

Methods for testing the throttle position sensor: When the throttle is fully closed, the idle contact IDL should be conducting; when the throttle is fully open or nearly fully open, the full-load contact PSW should be conducting; at other openings, both contacts should not be conducting. The throttle of a car engine is operated by the driver via the accelerator pedal to change the engine's air intake, thereby controlling the engine's operation. Different throttle openings indicate different engine operating conditions. To ensure the fuel injection meets the requirements of different conditions, the electronic fuel injection system is equipped with a throttle position sensor on the throttle body, which converts the throttle opening into an electrical signal sent to the ECU, serving as the basis for the ECU to determine the engine's operating condition.