节气门位置传感器（Solar term door position sensor）.docVIP

节气门位置传感器（Solar term door position sensor） Waveform analysis of electronic controlled components Throttle position sensor waveform analysis Throttle position sensor waveform analysis Waveform detection method ? 1. connected wave testing device, the probe is connected with the output signal of the sensor terminals, ground clip. 2. switch on the ignition, the engine doesnt work, and slowly let the throttle turn from the closed position to the fully open position and return to the throttle position. Slowly repeat the process several times. Then the waveform should be spread out on the screen. Consult the vehicle specification manual to obtain an accurate range of voltage. Normally, the voltage of the sensor should be less than 5V when the idle speed is below 1V and when the throttle is fully open. There should be no breaks, peaks or drops on the ground. Particular attention should be paid to the waveform of the valve opening in the front 1/4 section, which is the most commonly used part of the sensor carbon film during driving. The sensors front 1/8 to 1/3 carbon film is usually worn first. Some vehicles have two throttle position sensors. One for engine control and the other for transmission control. The signal from the engine throttle position sensor corresponds to the transmission throttle position sensor operation. The transmission throttle position sensor generates less than the 5V voltage at idle operation and changes below 1V when the throttle valve is fully open. Switch type throttle position sensor The output waveform of the throttle type position sensor is measured with a linear output throttle position sensor. ? it is a rotary switch composed of two switch contacts, a normally closed contact of idle switch, the door is in the solar term idle position, it is located in a closed state, the input signal of the engine idle ECU connected to ground, the engine ECU received the signal, can make the engine in idle speed control, stop injection control of engine fuel