Engine Ignition

The electronic ignition (El) system is a coil-on-plug ignition system. The coil-on-plug ignition system consists of the:

• Coil-on-plug.
• Spark plugs.
• Crankshaft position (CKP) sensor.
• Camshaft position (CMP) sensor.

The coil-on-plugs:

• Change low voltage signals from the powertrain control module (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.

The CKP sensor:

• Is a variable reluctance sensor.
• Is triggered by a 36-minus-l tooth trigger wheel mounted on the crankshaft.
• Provides base timing and crankshaft speed (RPM) to the PCM.

The CMP sensor:

• Is a Hall-effect sensor.
• Provides camshaft rotational location information to the PCM.