Crankshaft Position (CKP) Sensors

The crankshaft position (CKP) sensor has a 4-wire harness connector that plugs into the CKP sensor and connects to the ignition control module (ICM). The CKP sensor contains two hall-effect switches within the same housing, and shares a magnet between the switches. The magnet and each hall-effect switch are separated by an air gap. A hall-effect switch is a solid state switching device that produces a digital ON/OFF pulse when a rotating element passes the sensor pick-up and interrupts the magnetic field of the sensor. The rotating element is called an interrupter ring. There are two interrupter rings built into the crankshaft balancer. When the sync interrupter ring window is between the magnet and the switch, the magnetic field will cause the hall-effect switch to ground the supplied voltage from the ICM. The outer ring and the outer switch provide the ICM with 18X signals or 18 identical pulses per crankshaft revolution. The inner ring and the inner switch provide the ICM with 3X signals or 3 pulses per crankshaft revolution, each having a different duration.