Engine Ignition

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

• ten ignition coil-on-plugs.
• ten spark plugs.
• crankshaft position (CKP) sensor.

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). Refer to ELECTRONIC ENGINE CONTROLS - GASOLINE ENGINES article.

The 10 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 10 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.