Ignition Control Module: Description and Operation

DESCRIPTION

The Ignition Control (IC) module is located on top of the rear camshaft cover. The IC module performs several functions:


OPERATION

- 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.