What indicates a malfunction in the ABS system in a vehicle?

• A. A loud noise during braking
• B. The ABS warning light on the dashboard
• C. A decrease in engine power
• D. Flashing turn signals

Answer: (B)

The ABS (Anti-lock Braking System) warning light on the dashboard is a specific indicator that signifies a malfunction within the ABS. This light is designed to alert the driver to potential issues with the braking system that may impair the effectiveness of anti-lock brakes. When the ABS light is illuminated, it typically means that there is a fault in the system—such as a worn-out sensor, low brake fluid, or electrical issues—which could prevent the ABS from functioning correctly.

In contrast, a loud noise during braking might not exclusively indicate an ABS malfunction; it could arise from other braking issues such as worn brake pads or warped rotors. A decrease in engine power is unrelated to the ABS system, as it pertains more to engine performance and may result from various mechanical or electrical problems. Flashing turn signals are also not connected to the braking system and serve a different function related to signaling other drivers. Thus, the ABS warning light is the most direct and relevant indicator of an ABS system malfunction.