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:

- ignition coil-on-plugs.
- spark plugs.
- Crankshaft Position (CKP) sensor.
- Camshaft Position (CMP) sensor.

The ignition coil-on-plugs:

- change low voltage signals from the PCM to high voltage pulses.
- supply the high voltage pulses to the spark plugs.
- are connected directly to each spark plug.
- have replaceable coil boots.

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.
- is essential for calculating spark timing.

The CMP sensor:

- is a Hall-effect sensor.
- provides camshaft rotational location information to the PCM.
- sends the PCM a signal indicating camshaft position used for fuel synchronization.