Diagnostic Procedure: Notes
The CCC system may be considered a possible source of engine performance, fuel economy and exhaust emission problems, ONLY after normal checks (those which apply to vehicles without CCC) have been performed.
Diagnosis of CCC system consists of 3 types of check sheets: Diagnostic Circuit Check, Driver Complaint Sheet and System Performance Check. Any check sheet may refer to another chart for locating source of problem, or indicate no problem and refer to another sheet.
If all check sheets refer to others, problem is not in CCC system. The check sheets and their procedures are as follows:
NOTE:
If vehicle exhibits performance problems and no codes are set, refer to System Performance Chart. Components recorded by trouble codes are generally not the source of performance problems when no codes are stored in ECM memory.