Engine Ignition

ENGINE IGNITION

The electronic ignition (EI) system is a coil-on-plug ignition system.The coil-on-plug ignition system consists of the:
- 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 Hall-effect sensor.
- provides camshaft rotational location information to the PCM.