What does a technician check for when inspecting the ignition system?

When inspecting the ignition system, a technician focuses on key components that are integral to the system's performance. This includes checking spark plugs, which generate the necessary spark for ignition; ignition coils, which amplify voltage and send it to the spark plugs; and wiring, which ensures proper electrical connectivity throughout the ignition system.

Regular inspection of these components helps identify wear or faults that could lead to starting issues or engine misfires, ensuring reliable engine performance. By examining the entire ignition system, including these critical parts, a technician can diagnose and address problems effectively before they lead to more serious issues.

The other options involve different systems or components that do not directly relate to the ignition system, such as battery connections, which while important, are not the primary focus of ignition inspections. Brake pads and rotors pertain to the braking system, and fuel system components are unrelated to ignition system functionality. Therefore, the correct focus on spark plugs, ignition coils, and wiring reflects a comprehensive approach to maintaining the ignition system's health and overall vehicle performance.