Which of the following is NOT a characteristic of Anti-Lock Braking Systems (ABS) when applied correctly?

Anti-Lock Braking Systems (ABS) are designed to prevent wheel lock-up during heavy braking, allowing the driver to maintain steering control. When ABS operates properly, certain characteristics are associated with its function, such as noise, pedal movement, and a shuddering sensation.

Noise is often produced when ABS engages, which may sound like a rapid clicking or grinding as the system rapidly modulates brake pressure. This is a normal part of ABS operation and indicates that the system is working to prevent wheel lock-up.

Pedal movement or shuddering occurs because the ABS is pumping the brakes to maintain traction; this involves a quick release and reapplication of brake pressure. Drivers may feel this through the brake pedal, which is also a typical aspect of ABS functionality.

However, the hissing sound described in the context of a leaking compressor is not an inherent characteristic of the ABS system. Such a sound could indicate a malfunction or a problem unrelated to the braking system's operation, which is why it is identified as the correct answer in this context.

Understanding the correct characteristics of ABS helps drivers recognize normal system behavior and differentiate it from potential malfunctions, ensuring safer driving practices.