Engine Ignition

The Electronic Ignition (EI) system is a coil-on-plug ignition system. The coil-on-plug ignition system consists of:

• Camshaft Position (CMP) sensors.
• a Crankshaft Position (CKP) sensor.
• ignition coil-on-plugs.
• 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 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.
• have replaceable coil seals.

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 fine wire electrode for long life.