During the pedal reserve test, what must be observed?

During the pedal reserve test, it is crucial to observe that there is more than one-third of pedal travel remaining. This observation indicates that the vehicle's braking system is functioning effectively and has sufficient reserve travel available for safe operation. If the brake pedal travels less than one-third of its range, it suggests that the braking system may be compromised, potentially indicating issues such as air in the brake lines, worn brake components, or low brake fluid levels.

Having more than one-third pedal travel remaining is an essential safety consideration, as it ensures that the driver has adequate braking ability and can respond effectively in emergency situations. The proper function of the brake pedal reserve is a key indicator of the overall health of a vehicle's braking system, so ensuring that this criterion is met is essential for passing the safety inspection.