Ignition System: Description and Operation

GENERAL DESCRIPTION

IGNITION SYSTEM
In a conventional vehicle, the ignition coil produces a high voltage current which the distributor sends current, at the required time, to each spark plug.

The Sportage however uses a totally new ignition system. In this system two sensors (the camshaft position sensor and the crankshaft position sensor) tell the Engine Control Module (ECM) which cylinder is ready to fire. The ECM then sends an ignition signal to an electronic ignition coil. This ignition coil then produces and sends a high voltage current to the proper spark plug.

IGNITION COILS
The DOHC engine employs two ignition coils. The DOHC engine locates them directly above the #2 and #4 spark plug. The coil resistances are identical for the two coils, and there is no maintenance required; the coils are replaced if found to be faulty.

CAMSHAFT POSITION (CMP) SENSOR
The camshaft position sensor monitors the position of the camshaft. It is mounted at the rear of the cylinder head.

CRANKSHAFT POSITION (CKP) SENSOR
This sensor is on the front of the transmission case. It senses a ring on the flywheel for crankshaft position.

HIGH TENSION LEADS
The high tension leads connect the ignition coils to the spark plugs.

SPARK PLUGS
The spark plugs provide the air gap necessary to produce an arc from the energy coming from the ignition coil. This arc ignites the fuel/air mixture in the engine cylinder, producing power.