| Description and Operation The electronic ignition (EI) system is a coil-on-plug ignition system. The coil-on-plug ignition system consists of the following components: - coil-on-plug
- spark plugs
- crankshaft position (CKP) sensor
- camshaft position (CMP) sensor
The coil-on-plugs: - change low voltage signals from the powertrain control module (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.
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 PCM.
The CMP sensor: - is a variable reluctance sensor.
- provides camshaft rotational location information to the PCM.
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