Ignition Control Module: Description and Operation
IGNITION CONTROL MODULEThe Ignition Control (IC) module performs several functions:
^ It monitors the "ON-OFF" pulses produced by the two crankshaft and one camshaft position sensors.
^ It creates a 4X and 24X reference signal (4X REF HI and 24X crank) sent to the PCM for ignition control.
^ It creates a camshaft reference signal (CAM HI) sent to the PCM for fuel injection control.
^ It provides a ground reference (REF LO, CAM LO) to the PCM.
^ It provides a means for the PCM to control spark advance (BYPASS and IGNITION CONTROL) called IGNITION CONTROL MODE.
^ It provides a limited means of controlling spark advance without PCM input, called MODULE MODE.
^ The IC module is not repairable. When a module is replaced, the remaining components must be transferred to the new module.