Circuit Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Sonoma, 2003 GMC Safari, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
This system includes Crankshaft Position (CKP) sensor, Camshaft Position (CMP) sensor, ignition coil with Ignition Control (IC) module, secondary wires, spark plugs, and circuit conductors and connectors.
PCM controls ignition system and PCM monitors input signals from various engine sensors. The PCM controls dwell of ignition primary coil, computes desired spark timing and firing of ignition system via an IC timing control circuit to ignition control module.