How does a ignition control module work?

An ignition control module (ICM) regulates the timing and firing of the ignition system in an internal combustion engine. It receives input signals from various sensors, such as the crankshaft and camshaft position sensors, to determine the optimal timing for spark generation. The ICM then sends signals to the ignition coil, which creates a high-voltage spark to ignite the air-fuel mixture in the engine's cylinders. By precisely controlling spark timing, the ICM helps enhance engine performance, fuel efficiency, and emissions control.