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Home >> Cadillac >> 2006 >> STS Base, 3.6 7, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Control System - 4.4L - Troubleshooting & Diagnosis) >> Electronic Ignition (EI) System Diagnosis >> Circuit/System Description

Circuit/System Description

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The ignition system uses individual ignition coil/module assemblies for each cylinder. The engine control module (ECM) controls the individual coils by transmitting timing pulses on the ignition control (IC) circuit of each ignition coil/module to enable a spark event. Each ignition coil/module has the following circuits: