Ignition Module Operation

Ignition Module Location:

Ignition Module Pinout:

The Ignition Control Module monitors the crank sensor signals and based on these signals sends a reference signal to the ECM so that correct ignition and fuel injection control can be maintained during all driving conditions. During cranking, the DIS module monitors the "sync pulse" to begin the ignition firing sequence, and below 400 rpm the module controls spark advance by triggering each of the four coils at a pre-determined interval based on engine speed only. Above 400 rpm, the ECM controls the spark timing through the module (EST), and compensates for all driving conditions. The DIS module must receive a "sync pulse" and then a crank signal in that order to enable the engine to start. The are no serviceable parts in the ignition module. If a module develops a fault, it must be replaced.