Engine Ignition

ENGINE IGNITION

The electronic ignition (EI) system is a coil-on-plug (COP) ignition system. The COP ignition system consists of the following components:
- crankshaft position (CKP) sensor
- ignition coils
- spark plugs

The CKP sensor:
- is a variable reluctance sensor.
- is triggered by a 40-minus-1 tooth trigger wheel mounted on the crankshaft.
- provides base timing and crankshaft speed (rpm) to the powertrain control module (PCM).

The 10 separate ignition coils:
- 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 a high voltage pulse into a spark which ignites the fuel and air mixture.
- originally equipped on the vehicle have a platinum-enhanced electrode for long life.