Engine Ignition

ENGINE IGNITION

The electronic ignition (EI) system is a coil-on-plug ignition system. The coil-on-plug ignition system consists of:
- two camshaft position (CMP) sensors.
- crankshaft position (CKP) sensor.
- six ignition coil-on-plugs.
- six spark plugs.

The CMP sensors:
- are variable reluctance sensors.
- are mounted in the rear of the cylinder head.
- are triggered by a 3-plus-1 timing wheel on each intake camshaft.
- provides camshaft rotational location information to the PCM.

The CKP sensor:
- is a variable reluctance sensor.
- is triggered by a 36-minus-1 tooth trigger wheel mounted on the crankshaft, at the rear of the engine.
- provides base timing and crankshaft speed (rpm) to the PCM.

The 6 separate ignition coil-on-plugs:
- convert battery energy to high-energy output as controlled by the PCM.
- transfer the high-energy output to the spark plugs.
- are connected directly to each spark plug.
- have replaceable coil seals.

The 6 spark plugs:
- transfer high-energy coil output into a spark which ignites the fuel and air mixture.
- originally equipped on the vehicle have a platinum-enhanced fine wire electrode for long life.