Ignition Module/Coils

This ignition system consists of one ignition module combined with three separate ignition coils, assembled into one component. Between the engine control module (ECM) and the ignition module there are three separate ignition coil control circuits and a ground circuit. Power for the ignition module and the ignition primary coils is supplied by a fuse ignition circuit from the underhood fuse block. A separate ground wire is provided from the ignition module to the engine block. The ignition coil 1 control circuit controls the spark energy for cylinders 1 and 4. The ignition coil 2 circuit controls the spark energy for cylinders 2 and 5. The ignition coil 3 circuit controls the spark energy for cylinders 3 and 6. The ignition control module contains a solid state driver circuit for each separate coil. The ignition module driver will allow current to flow through the primary winding when a signal is received from the ECM. The ECM will control the amount of time or dwell that current is flowing through the primary coil windings. When the ECM commands the ignition coil control circuit OFF, this will interrupt current flow through the primary coil windings. When the ECM commands the ignition coil control circuit OFF, this will interrupt current flow through the primary coil windings. When current is interrupted to the primary windings, the ignition coil primary energy collapses across the secondary coil windings. This stepped up secondary energy will transfer to both spark plugs electrodes, by the spark plug wires attached to each end of the secondary coil winding. The primary windings of each coil are current limited to prevent overloading if the ignition coil control circuit is held ON for an extended time.