What does it mean when the vehicle displays an ABS fault?

[Legolas]

When a vehicle displays an ABS fault, it indicates a malfunction in the Anti-lock Braking System. The possible causes include: ABS wheel speed sensor failure, ABS wiring connection issues, ABS control unit programming errors, or ABS master cylinder failure. The function of ABS is to automatically regulate the braking force during vehicle deceleration, preventing wheel lock-up and maintaining a rolling-sliding state to ensure optimal tire-road adhesion. The working principle of ABS involves: during emergency braking, highly sensitive wheel speed sensors detect impending wheel lock-up, prompting the computer to activate pressure modulators that release brake cylinder pressure, thereby preventing complete wheel lock-up.