Ignition System: Description
WARNING: This page is about a different car, the 2004 Hyundai Tiburon. However, it is still accessible from the selected car via links, so may be relevant.
Ignition timing is controlled by the electronic control module. The standard reference ignition timing data for the engine operating conditions are pre-programmed in the memory of the ECM (engine control module).
The engine operating conditions (speed, load, warm-up condition, etc.) are detected by the various sensors. Based on these sensor signals, the ECM controls the ignition timing.