Which three components comprise an anti-lock brake system?

The three components that comprise an anti-lock brake system (ABS) are the Electronic Control Unit (ECU), wheel sensors, and ABS valves.

The Electronic Control Unit is the brain of the ABS, processing signals from the wheel sensors to monitor the speed of each wheel. When the ECU detects that a wheel is about to lock up during braking, it activates the ABS valves. These valves modulate the brake pressure, allowing the wheel to continue spinning and thereby preventing a skid.

Wheel sensors play a crucial role by continuously monitoring the rotational speed of each wheel. If a significant difference in speed is detected, indicating that a wheel is about to lock up, the system responds appropriately to maintain control of the vehicle.

ABS valves are essential in controlling the brake pressure applied to each wheel, allowing for rapid adjustments. This ability to alter pressure helps maintain traction and steering functionality during hard braking or slippery conditions.

The other options list components that do not directly relate to the function of an anti-lock brake system.