What is the Principle and Application Method of Sensors?

[Josiah]

The principle of sensors is to convert various operating condition information of the car into electrical signals and input them into the computer, ensuring the engine operates in the optimal state. They are applied in: checking vehicle speed, various medium temperatures, engine operation, and other working conditions. The detection method for the camshaft position sensor is as follows: 1. Unplug the connector, turn the key to the second position, and use a voltmeter to measure and confirm that the power line has voltage output; 2. Use the meter to identify the ground wire. Connect one probe of the voltmeter to the confirmed power line and the other probe to the remaining two wires. The wire that shows voltage is the ground wire, and the remaining one is the signal wire; 3. Then, turn off the key, pull out the signal wire, plug back the connector, start the engine, and measure the signal wire and ground wire to see if there is a signal voltage output. The output voltage should be less than the supply voltage. If there is no voltage, the sensor is likely faulty; 4. While performing the above steps, check if the signal teeth on the camshaft are in good condition, if there are any obstructions between the camshaft sensor and the signal teeth, and if the gap is normal.