How to Perform Diagnostic Procedures Correctly

What should be done after visual inspection in a diagnostic procedure?

a. Clear the DTCs from the memory of the PCM

b. Use serial data when there are no DTCs but there is a fault in the system

c. Both A and B

d. Neither A nor B

Answer:

c. Both A and B

Technician A and Technician B both provide important steps in the diagnostic procedure. After performing a visual inspection, it is necessary to clear the Diagnostic Trouble Codes (DTCs) from the memory of the Powertrain Control Module (PCM) in order to accurately assess the vehicle's issues. Additionally, utilizing serial data can be helpful in diagnosing a fault in the system even when no DTCs are present.

Technician A is correct in emphasizing the importance of clearing DTCs from the PCM after visual inspection, while Technician B is correct in highlighting the role of serial data in diagnosing system faults without DTCs present. By following both steps, technicians can effectively identify and address vehicle issues.