Camshaft Position (CMP) Sensor
CMP sensor is located inside distributor. See Fig 1 . This Hall Effect sensor works in conjunction with Crankshaft Position (CKP) sensor, providing PCM with inputs necessary to establish and maintain proper fuel injector firing order.
When leading edge of pulse ring enters sync signal generator on camshaft position sensor, resulting change in magnetic field causes a 5-volt reference signal to be induced. When trailing edge of pulse ring leaves sync signal generator on CMP sensor, resulting collapse of magnetic field causes reference signal to drop to zero volts.