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-l 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.