Ignition Timing: Description and Operation

Engine Ignition

This vehicle uses a coil-on-plug electronic ignition system. The coil-on-plug ignition system consists of the following components:
- Powertrain control module (PCM)
- Crankshaft position (CKP) sensor
- Ignition coil-on-plug
- Spark plugs

The PCM and the CKP sensor are also part of the electronic engine controls system.

Eight separate ignition coils:
- are controlled by the PCM for the correct firing sequence.
- are mounted directly above each spark plug.

The spark plugs:
- change the high voltage pulse into a spark which ignites the fuel and air mixture.
- originally equipped on the vehicle have a platinum active electrode for long life.