Hombre S Regular Cab 4WD V6-4.3L (1999)
Ignition Control Module: Description and Operation
Ignition Coil Driver Module and Ignition Coil
The Ignition Coil Driver Module is mounted on a bracket next to the coil. The VCM signals the ICD to turn ON primary current to the ignition coil 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.
