What should be the first step in diagnosing issues with air brake systems?

Starting with the driver’s interview is a vital first step in diagnosing issues with air brake systems because the driver can provide firsthand accounts of the problems they have experienced. Their insights can highlight specific symptoms, such as unusual noises, delayed braking, or loss of pressure, which can guide the technician toward potential causes.

Gathering information from the driver can help to narrow down the scope of the diagnosis. Understanding the operational context—such as whether the issue occurs during certain driving conditions or after specific actions—can also provide valuable clues. This step often helps technicians to avoid unnecessary guesswork and ensures that they focus their efforts on the most relevant systems or components.

By understanding the specific symptoms from the driver's perspective, a technician can prioritize which tests or inspections to perform next, facilitating a more efficient and targeted approach to identifying and resolving the issue.