System Description

The Computer Command Control (C3) System is an electronically controlled emission system that can monitor as many as fifteen different engine/vehicle operating conditions, Fig. 1. The Electronic Control Module, (ECM), the control center of the C3 system, processes this information and signals commands to various engine performance related systems.
The C3 system has a built in diagnostic system that recognizes and identifies possible operational problems and notifies the driver through a ``Check Engine'' light located in the instrument panel. The ``Check Engine'' light will remain in the ``On'' position until the problem is rectified. This same light is used, with the built in diagnostic system, to help the service technician in locating and repairing problems by flashing a series of codes which identify the possible problem areas at fault in the system.
The system also allows for near normal driving conditions during system malfunction, through the use of a built in backup system. The backup system remains in effect until repairs can be made.