Spark Control Computer

The Spark Control Computer (SCC) is the heart of the entire system. It gives the system the capability of igniting a lean fuel mixture according to different modes of engine operation by delivering an infinite amount of variable advance curves. The computer determines the exact instant when ignition is required, then signals the ignition coil to produce the spark required to fire the spark plugs.

The computer consists of one electronic printed circuit board which receives signals from all the sensors and, within milliseconds, computes them so that proper advance or retard is immediately achieved.

Fig 1: Wiring Diagram for Chrysler Electronic Spark Control System Models with 5.2L EFI engines have only one pick-up coil.

Fig 2: Electronic Spark Control Computer Spark Control Computer is mounted on air cleaner.