Ignition Systems: Notes
WARNING: This page is about a different car, the 2003 Dodge SX and 2003 Dodge Neon. However, it is still accessible from the selected car via links, so may be relevant.
All engines use a fixed ignition timing system. Basic ignition timing is not adjustable. All spark advance is determined by the Powertrain Control Module (PCM). The crankshaft position sensor and camshaft position sensor are Hall Effect devices. The camshaft position sensor and crankshaft position sensor generate 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 & camshaft position.