Final answer:
The correct answer is option c) wheel speed sensor, which sends rotational speed data to the ABS module to prevent wheel lockup and maintain vehicle control.
Step-by-step explanation:
The correct answer is option c) wheel speed sensor. The wheel speed sensor is a critical component of the Anti-lock Braking System (ABS). Its primary function is to continuously measure the rotational speed of each wheel and send this information to the ABS module.
The ABS module uses this data to determine whether any wheels are about to lock up during braking. If such a risk is detected, the system can then actuate the modulator valves to adjust the brake pressure to prevent wheel lockup and maintain vehicle control and stability.
The allows for communication between the engine control module and the ABS, but it does not provide the input signal that the ABS requires for proper operation. Similarly, slack adjuster travel is more related to maintaining the correct distance between the brake shoes and the drum, rather than providing input to the ABS module.
The correct answer is option c) wheel speed sensor. The wheel speed sensor provides the input signal to the ABS (Anti-lock Braking System) module. The ABS module uses the wheel speed sensor to monitor the rotational speed of each wheel and detect any wheel lock-up during braking.
The wheel speed sensor works by generating an electrical signal based on the rotation of the wheel. It typically uses a magnetic or Hall effect sensor to detect the movement of a toothed rotor or a magnetic ring attached to the wheel hub. This signal is then sent to the ABS module, which uses it to determine if any wheel is slowing down too quickly, indicating a potential lock-up.
By monitoring the wheel speeds and automatically modulating the brake pressure, the ABS system helps prevent the wheels from locking up, allowing the driver to maintain control of the vehicle during emergency braking situations.