Ignition System: Description and Operation

The Electronic Ignition (EI) system is a Coil-On-plug (COP) ignition system. The COP ignition system consists of the following components:
^ Crankshaft Position (CKP) sensor
^ ignition coils
^ spark plugs

The CKP sensor:
^ is a variable reluctance sensor.
^ is triggered by a 36-minus-1 tooth trigger wheel mounted on the crankshaft.
^ provides base timing and crankshaft speed (rpm) to the Powertrain Control Module (PCM).

The eight separate ignition coils:
^ change low voltage signals from the PCM to high voltage pulses.
^ produce the high voltage pulses to the spark plugs.
^ are connected directly to each spark plug.

The spark plugs:
^ change high voltage pulses into a spark which ignites the fuel and air mixture.
^ originally equipped on the vehicle have a platinum-enhanced active electrode for long life.