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-plug.
- spark plugs.

The CMP sensor:
- is a variable reluctance sensor.
- is mounted in the front cover.
- is triggered by the high point mark on the LH exhaust camshaft.
- provides camshaft rotational location information to the powertrain control module (PCM).

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 6 separate ignition coil-on-plugs:
- 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.