Ignition Control Module: Description and Operation

Power Transistor:

PURPOSE
To activate the primary circuit in the ignition coil.

OPERATION
The power transistor is a voltage amplifier that allows the signal sent from the PCM to activate the primary circuit in the ignition coil. This induces high voltage in the secondary windings of the ignition coil, providing spark to the distributor cap and plugs.

LOCATION
The power transistor is located near the base of the distributor,