Ignition Control Module (ICM)

The ignition control module is located in engine compartment, just left of battery. The ICM consists of a solid-state ignition circuit and an integrated ignition coil that can be removed and serviced separately.

Electronic signals from the electronic control unit to the ICM determine the amount of ignition timing or retard needed to meet various engine requirements. The electronic control unit provides an input signal to the ICM. The ICM has only 2 outputs: a tach signal to the tachometer and diagnostic connector, and a high voltage signal from the coil to the distributor cap.