General information about the ignition system (Hyundai Santa Fe CM)

The ignition advance angle is controlled by the electronic control system. The values of the optimal ignition advance angles for all engine operating modes are recorded in the memory of the electronic engine control unit (ECM).

The engine operating mode (crankshaft speed, load, engine thermal state, etc.) is determined by signals from various sensors. Based on the signals from the sensors and data on the optimal ignition advance angles, the electronic engine control unit (ECM) sends a signal to interrupt the current in the primary winding of the ignition coil to the power transistor.

A high voltage is induced in the secondary winding of the ignition coil, sufficient to generate a spark between the spark plug electrodes, and thus optimal control of the ignition timing angle occurs.