What is the first step before checking the exterior components of a vehicle?

The first step before checking the exterior components of a vehicle is to ensure that the vehicle is parked on a flat surface. This is crucial for several reasons. A flat surface provides stability and prevents the vehicle from rolling, which is essential for safety while conducting the inspection. When the vehicle is on an incline, components may shift or align differently, potentially leading to misleading observations of the vehicle's condition. Furthermore, being on a level surface ensures accurate measurements when checking items like tire pressure, as the vehicle's weight distribution can affect how these readings are taken.

Other steps, such as performing an interior inspection or checking tire pressure, are important but come later in the overall process of vehicle evaluation. Starting the engine to check for warning lights is also a necessary task, but it should occur after the initial exterior inspection has confirmed that the vehicle is stable and safe to operate. Prioritizing the establishment of a secure inspection environment—the flat surface—sets the foundation for all subsequent checks and helps ensure thoroughness and safety in the vehicle inspection process.