Electronic Ignition System: Notes

The electronic ignition system consists of ECM, power output stage, ignition coil, distributor, mass airflow sensor, throttle valve potentiometer, engine coolant temperature sensor, and Hall Effect sensor.

Ignition system uses engine speed, engine load and throttle valve potentiometer signals to calculate ignition timing. Engine coolant temperature signal is used to correct ignition timing when engine is cold and to activate knock sensor circuit. See KNOCK SENSOR(S) under IGNITION TIMING CONTROL.