What is the testing method for the camshaft position sensor?
1 Answers
Camshaft position sensor testing method: 1. The camshaft sensor is a three-wire Hall sensor. Prepare a 12-volt or 5-volt power line, a signal line, and a ground line; 2. Unplug the connector, turn the key to the second position, and use a voltmeter to confirm that the power line has voltage output; 3. Use the meter to identify the ground line. Connect one probe to the confirmed power line and the other probe to the remaining two lines to measure voltage. The line with voltage is the ground line, and the remaining one is the signal line; 4. Now turn off the key, extend the signal line, reconnect the connector, start the engine, and measure between the signal line and the ground line to see if there is a signal voltage output. The voltage should be less than the supply voltage. If there is no voltage, the sensor is damaged. The function of the camshaft position sensor is to detect the position and angle of the camshaft, thereby determining the top dead center position of the first cylinder piston during compression. During startup, the engine ECU uses signals from the camshaft position sensor and the crankshaft position sensor to identify the position and stroke of each cylinder piston, controlling the fuel injection sequence and ignition sequence for precise fuel injection and ignition control.
