2001 Nissan Frontier Owner's Manual - Page 170

WARNING ● While driving on a slippery surface, be careful when braking, accelerating or downshifting. Abrupt braking or accelerating could cause the wheels to skid and result in an accident. ● If the engine is not running or is turned off while driving, the power assist for the brakes will not work. Braking will be harder. ANTI-LOCK BRAKE SYSTEM (ABS) Using the system (4-wheel ABS) Depress the brake pedal and hold it down. WARNING Do not pump the brake pedal. Doing so may result in increased stopping distances. slippery road. Thus, difficult steering and swerving of the vehicle due to locked wheels is minimized. The system detects the wheel rotation rate and electronically controls the pressure applied to each brake. Slight vibration on the brake pedal accompanied by noise usually occurs while the ABS system is operating. Such vibration and noise encountered during abrupt braking is not a problem, but indicates that the system is functioning. Wet brakes When the vehicle is washed or driven through water, the brakes may get wet. As a result, your braking distance will be longer and the vehicle may pull to one side during braking. To dry the brakes, drive the vehicle at a safe speed while lightly pressing the brake pedal to heat the brakes. Do this until the brakes return to normal. Avoid driving the vehicle at high speeds until the brakes function correctly. Using the system (2-wheel rear ABS) Depress the brake pedal and hold it down. With the rear anti-lock brake system, the front wheels can still lock. If this happens, release the brake pedal slightly and then reapply pressure. Self-test feature The anti-lock brake system consists of electronic sensors and hydraulic solenoids controlled by a computer. The computer has a built-in diagnostic feature that tests the system each time you start the engine and move the vehicle at a low speed in forward or reverse. When the self-test occurs, you may hear a ''clunk'' noise and/or feel a pulsation in the brake pedal. This is normal and is not an indication of any malfunction. If the computer senses any malfunction, it switches the anti-lock brake system off and turns on the ABS brake warning light in the dashboard. The brake system then operates normally, but without anti-lock assistance. Normal Operation The anti-lock brake system does not operate at speeds below 3 to 6 MPH (5 to 10 km/h). (The speeds vary according to road conditions.) When driving, the anti-lock brake system controls the wheels so they will not lock when braking abruptly or when braking on a 5-26 Starting and driving