3. Technician A says that on-board self-diagnostics test mode procedures should be conducted on a cold engine. Technician B says

Question

Serjik [45]

3 years ago

3

3. Technician A says that on-board self-diagnostics test mode procedures should be conducted on a cold engine. Technician B says

that many diagnostic trouble codes (DTCs) will monitor items only when the engine control system is in closed loop.

Engineering

1 answer:

Fudgin [204] · Answer 1 · 2022-06-28T17:59:49+03:00

Answer:

Technician B

Explanation:

on-board self-diagnostics test mode procedures should be conducted on a warm engine since many DTCs only monitor in closed loop. Therefore, technician A is wrong. Many DTCs will monitor items only when the engine control system is in closed loop. Closed loop operation requires the engine to reach a certain operating temperature before it can be entered. Therefore, technician B is correct.