Your vehicle is equipped with an anti-lock braking system (ABS). This system helps you maintain steering control during emergency stops by keeping the brakes from locking. The ABS operates by detecting the onset of wheel lockup during brake application and compensates for this tendency. Noise from the ABS pump motor and brake pedal pulsation may be observed during ABS braking; any pulsation or mechanical noise you may feel or hear is normal. In addition, the ABS performs a self-check after you start the engine and begin to drive away. A brief mechanical noise may be heard during this test. This is normal.