Ignition Control Module: Description and Operation

IDIS Ignition Coil And Module Assembly:

Ignition System Wiring Schematic:

PURPOSE
The Electronic Ignition (EI) control module monitors the crank sensor signals and based on these signals sends a reference signal to the PCM so that correct spark and fuel injector control can be maintained during all driving conditions.

OPERATION
During cranking, the EI module monitors the "sync pulse" to begin the ignition firing sequence and below 700 rpm the module controls spark advance by triggering each of the two coils at a pre-determined interval based on engine speed only. Above 700 rpm the PCM controls the spark timing (IC) and compensates for all driving conditions. The EI module must receive a "sync pulse" and then a crank signal in that order to enable the engine to start. The EI module is not repairable. When a EI module is defective, the module is replaced as a separate component.

LOCATION
EI Assembly.