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Home >> Jeep >> 1989 >> Wagoneer >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - 4.0L MPFI >> Operation >> Ignition Control Module

Ignition Control Module

The ignition control module is mounted to the ignition coil. See Figure . Based on control system inputs, the ECU will trigger the ignition coil via the ignition control module. The ECU is able to advance or retard ignition timing by controlling the ignition coil through the ignition control module.