OBD Diagnostic Computer Command Control (C3) Performance Diagnosis 85

Section A covers the full function system in 5 parts;

Part 1 is general diagnostic information and system performance checks to verify that the OBD system is capable of testing.

Part 2 covers the basic driveabilty symptoms that may or may not have trouble codes (DTC) associated with them. These are the typical complaints a customer might have like stalling or hard starting and the suggested items to check that can save the mechanic time.

Part 3 is diagnostic flow charts for those complaints with stored trouble codes (DTC). These charts guide the mechanic in proper testing in sequence.

Part 4 is diagnostic flow charts on related components without stored trouble codes (DTC).  These include the proper testing prior to replacing an ECM (PCM OBD II). Some of these were later incorporated into the diagnostic of the system in OBD II. Using these flow charts can not only save time, but eliminate frustration and expenses from replacing known good parts.

Part 5 is the ECM (PCM OBD II) terminal identification by engine size and identification code.

Section B covers the Min T system of the T car (Chevrolet Chevette and Pontiac T1000);

Part 6 is system diagnosis ..see Part 1 above

Part 7 is diagnostic trouble codes (DTC) see Part 2 above

Part 8 is  diagnostic flow charts for those complaints with stored trouble codes (DTC). These charts guide the mechanic in proper testing in sequence

Part 9 is the ECM (PCM OBD II) terminal identification