If a driver experiences ABS engagement every time they apply the brakes on uneven surfaces, what does this indicate?

• A. The system is malfunctioning
• B. The wheels are traveling at different speeds
• C. The vehicle is too heavy
• D. The brake pads need replacement

Answer: (B)

Experiencing ABS engagement every time brakes are applied on uneven surfaces suggests that the wheels are traveling at different speeds. Anti-lock brake systems (ABS) are designed to prevent wheel lock-up during braking, especially in slippery or uneven conditions. When a driver applies the brakes, the ABS monitors the speed of each wheel. If one wheel begins to spin faster or slower than the others—such as on an uneven surface—the ABS activates to modulate brake pressure to that wheel, thus preventing lock-up and maintaining vehicle control.

This behavior is expected and indicates that the ABS is functioning normally by responding to differences in wheel speed due to varying traction on uneven surfaces. Therefore, the consistent engagement of ABS in this scenario is a sign that the system is effectively performing its role to ensure safe braking rather than indicating a malfunction or other issues with the vehicle.