Ignition Control Module: Description and Operation

Ignition Coil Driver Module:

The Ignition Coil Driver Module (3, 4 - ICM Bolt) is mounted on a bracket (5, 6, 1-Bracket Attachment Rivet) next to the coil. The VCM signals the ICD to turn ON primary current to the ignition coil (2) by pulling the IC line high (4 volts). The ICD turns the primary current ON and OFF by applying and removing the ground to the primary winding at the appropriate time. This module is of minimum function. The module does not contain backup calibrations that allows the engine to continue to run if the IC signal is lost.