Other information:
System Operation
Comprehensive Component Monitor (CCM)
The
comprehensive component monitor (CCM) checks for concerns in any
powertrain electronic component or circuit that provides input or output
signals to the PCM that can affect emissions and is not monitored by another OBD
monitor...
Principles of Operation
Inspection and Verification
Verify the customer concern by operating the vehicle to duplicate the condition.
If the inspection reveals an obvious concern(s) that can be readily identified, repair as necessary...