Ignition Control Module: Description and Operation

Ignition Module:

The power transistor unit, located on the front of the right cylinder head, is a low current switch. It allows the signal sent from the ECU (very low current) to activate the primary circuit in the ignition coil (much higher current). This induces high voltage in the secondary windings of the ignition coil, providing spark to the plugs. There are six power transistors in the unit.