Ignition System: Operation
WARNING: This page is about a different car, the 2014 Volkswagen Routan, 2013 Volkswagen Routan, 2012 Volkswagen Routan, and 2011 Volkswagen Routan. However, it is still accessible from the selected car via links, so may be relevant.
The crankshaft position sensor and camshaft position sensor are hall effect devices. The camshaft position sensor and crankshaft position sensor generate square wave pulses that are inputs to the PCM. The PCM determines engine position from these sensors. The PCM calculates injector sequence and ignition timing from crankshaft AND camshaft position.