2003 Nissan Sentra Owner's Manual - Page 127

lem, but indicates that the system is functioning properly. However, the pulsation may indicate that road conditions are hazardous and extra care is required while driving. WARNING ● The anti-lock brake system is a sophisticated device, but it cannot prevent accidents resulting from careless or dangerous driving techniques. It can help maintain vehicle control during braking on slippery surfaces, but remember that the stopping distance on slippery surfaces will be longer than on normal surfaces even with the anti-lock brake system. Stopping distances may also be longer on rough, gravel or snow covered roads, or if you are using tire chains. Tire type and condition may also affect braking effectiveness. Always maintain a safe distance from the vehicle in front of you. Ultimately, the responsibility for safety of self and others rests in the hands of the driver. ● Tire type and condition of tires may also affect braking effectiveness. ● When replacing tires, install the specified size of tires on all four wheels. 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 on the instrument panel. The brake system then operates normally, but without antilock assistance. If a malfunction occurs in the system, the antilock function will not operate, but the standard vehicle brake system will continue to operate normally. The ABS brake warning light will then come on. If the light comes on during the self-test or while driving, take the vehicle to a NISSAN dealer for repair. ● When installing a spare tire, make sure it is the proper size and type as specified on the tire placard. For tire placard location information, refer to "Tire placard" in the "Technical and consumer information" section of this manual. ● Refer to "Wheels and tires" in the "Maintenance and do-it-yourself" section of this manual. Starting and driving 5-19