Electricronic Ignition System

ENGINE IGNITION

The electronic ignition (EI) system is a coil-on-plug (COP) ignition system. The COP ignition system consists of the following components:
- crankshaft position (CKP) sensor.
- camshaft position (CMP) sensor.
- ignition coils.
- spark plugs.







The crankshaft position sensor:
- is a variable reluctance sensors.
- is mounted to the engine sump body.
- is triggered by a 36-minus-1 tooth trigger wheel mounted on the crankshaft.
- provides base timing and crankshaft speed (rpm) to the powertrain control module (PCM).







The two camshaft position sensors:
- are mounted on the rear of each cylinder head.
- send the powertrain control module (PCM) a signal indicating camshaft position used for fuel and spark synchronization.







The eight separate ignition coils:
- convert low voltage signals from the PCM to high voltage pulses.
- produce the high voltage pulses for the spark plugs.
- are connected directly to each spark plug.

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