Electronic Ignition System

Ignition system consists of a distributor which uses a signal rotor, pick-up coil, ignition module and external coil. Power for ignition coil is provided through the ignition switch.

As rotating signal rotor passes pole piece of pick-up coil, a reference signal is sent from the ignition module to the ECM. The ECM uses reference signal to determine when to signal ignition module to open ground circuit for primary ignition.

When ignition module opens ground circuit for primary ignition, magnetic field around ignition coil windings collapses, producing an induced high voltage surge which is used to fire the spark plugs.