Description & Operation: Description

Ignition timing is controlled by the electronic control ignition timing system.
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 and the ignition timing data, signals to interrupt the primary current are sent to the ECM.