What is the primary purpose of the brake pedal sensor in an antilock brake system?

The primary purpose of the brake pedal sensor in an antilock brake system is to monitor driver input on braking. This sensor detects how much pressure the driver is applying to the brake pedal and sends this information to the vehicle's electronic control unit (ECU). By understanding the driver's intentions, the antilock brake system can adjust the brake pressure to prevent wheel lock-up during hard braking situations, enhancing vehicle control and safety.

In contrast, measuring brake pad thickness, indicating brake fluid levels, or controlling the antilock feature does not directly relate to the primary function of the brake pedal sensor. These functions are handled by different components within the brake system, emphasizing the specific role the brake pedal sensor plays in facilitating optimal braking performance through effective feedback on driver input.