How to Measure the Crankshaft Position Sensor?

[CassandraMarie]

The measurement method for the crankshaft position sensor is: 1. Observe the engine speed displayed on the dashboard; 2. Use a multimeter to measure the resistance value between terminals 1 and 2 of the sensor. The crankshaft position sensor is installed at the front pulley of the vehicle's crankshaft, near the large flywheel at the rear of the crankshaft, or in the middle of the crankshaft. The functions of the crankshaft position sensor are: 1. Detect the engine speed to determine the fuel injection volume and ignition advance angle, avoiding a reduction in fuel injection; 2. Detect the reference position of the engine's reference cylinder for cylinder sequence discrimination; 3. Detect the angle through which the crankshaft has rotated to determine the position of the piston, thereby determining the ignition timing and fuel injection timing.