Feedback Carburetor Theory/Operation: Description
CCC is an electronically controlled exhaust emission system. It monitors several engine/vehicle functions and controls various operations, including the transmission torque converter clutch (TCC). The CCC system aids in the control of exhaust emissions while maintaining good fuel economy and driveability.
The Electronic Control Module (ECM) is the "brain" of the CCC system. The ECM controls engine systems to maintain good vehicle performance under all normal driving conditions.
The primary objective of the system is to maintain an ideal air/fuel ratio of 14.7:1. With this ratio maintained, the catalytic converter can effectively control nitrogen oxides (NOx), hydrocarbons (HC) and carbon monoxide (CO).