Section 3 (Ignition System (Service Information) 1.4L 16-Valve Turbo - 500): Operation: Operation

The crankshaft position (CKP) sensor and camshaft position (CMP) sensor are hall effect devices. The CMP sensor and CKP sensor generate square wave pulses that are inputs to the powertrain control module (PCM). The PCM determines engine position from these sensors. The PCM calculates injector sequence and ignition timing from crankshaft and camshaft position.