Ignition System: Description and Operation

GENERAL INFORMATION
Ignition timing is controlled by the electronic control ignition timing system. The standard reference ignition timing data for the engine operation conditions are pre-programmed in the memory of the engine control module (ECM).

The engine condition (speed, load, warm-up condition, etc.) are detected by various sensors. Based upon these sensor signals and the ignition timing data, signals to interrupt the primary current are sent to the ECM. The ignition coil is activated, and timing is controlled.