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:

- Camshaft Position (CMP) sensor.

- Crankshaft Position (CKP) sensor.

- ignition coil-on-plugs.

- spark plugs.

The CMP (Camshaft Position) sensor:

- is a Hall-effect sensor.

- is mounted in the front cover.

- is triggered by the high point mark on the intake camshaft trigger wheel.

- provides camshaft rotational location information to the PCM.

The CKP (Crankshaft Position) 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 ignition coil-on-plugs:

- change low voltage signals from the PCM to high voltage pulses.

- supplies 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.