The anti-lock braking system (ABS) works by limiting, applying and releasing the pressure to any wheel that decelerates too quickly. This allows maximum stopping force to be applied without the brakes locking-up and the car skidding.
The ABS tests itself each time the ignition is turned on. If a defect is detected for whatever reason, the ABS turns itself off and the normal braking system is used on its own. The ABS warning light will inform the driver of a defect in the system.
The parking or hand brake is a lever mechanism that is applied to hold a vehicle in a parked position. It activates braking components at the rear of the vehicle's braking system.