What should always be done before beginning any diagnosis?

• A. Inspect the vehicle basics
• B. Verify the Customer's Concern
• C. Check tire pressure
• D. Confirm the appointment

Answer: (B)

Verifying the customer’s concern before diagnosing is crucial because it anchors your inspection to the issue the driver is experiencing. By clarifying when it happens, under what conditions, and any symptoms or noises, you set a precise focus for your tests and avoid chasing unrelated problems. This step also helps you reproduce the issue during diagnostics and clearly communicate the plan to the customer. While inspecting basic vehicle systems and safety checks like tire pressures are important, they are steps after you’ve confirmed what the customer is complaining about. Administrative tasks such as confirming the appointment don’t address the diagnostic problem.