Question

technician a says after performing a repair to an electronic control system, the repair should be validated before returning a machine to service to confirm the fault code does not reappear. technician b says in hd - obd systems, repair validation requires operating the circuit or device under the enabling conditions for a major system monitor to run and obtain a system readiness code. who is correct?
select one:
○ a. technician a
○ b. technician b
○ c. both technician a and technician b
○ d. neither technician a nor technician b

Explanation:

• For Technician A: After repairing an electronic control system, validating the repair (to check if the fault code reappears) before returning the machine to service is a standard practice to ensure the repair was successful.
• For Technician B: In HD - OBD (Heavy - Duty On - Board Diagnostics) systems, repair validation involves operating the circuit/device under the enabling conditions for a major system monitor to run and obtain a system readiness code. This is also a correct procedure for validating repairs in such systems. So both technicians are correct.

Answer:

c. Both Technician A and Technician B