2003 Nissan Pathfinder Owner's Manual - Page 247

Self-adjusting brakes Your vehicle is equipped with self-adjusting brakes. The front and rear brakes self-adjust every time the brake pedal is applied. have audible wear indicators. Should you ever hear an unusually loud noise from the rear drum brakes, have them inspected as soon as possible by your NISSAN dealer. Proper brake inspection intervals should be followed. For additional information, see the separate "Service and Maintenance Guide". WARNING See your NISSAN dealer and have it checked if the brake pedal height does not return to normal. DI0453 BRAKE BOOSTER Check the brake booster function with the following steps: 1. With the engine off, press and release the brake pedal several times. When brake pedal movement (distance of travel) remains the same from one pedal application to the next, continue on to the next step. 2. While depressing the brake pedal, start the engine. The pedal height should drop a little. 3. With the brake pedal depressed, stop the engine. Keeping the pedal depressed for about 30 seconds, the pedal height should not change. 4. Run the engine for one minute without depressing the brake pedal, then turn it off. Depress the brake pedal several times. The pedal travel distance will decrease gradually with each depression as the vacuum is released from the booster. CHECKING BRAKE PEDAL With the engine running, check distance A between the upper surface of the pedal and the dash lower panel. Distance A M/T models 2-1/2 in (65 mm) or more A/T models 2-3/4 in (70 mm) or more If it is out of the range shown above, see your NISSAN dealer. Brake pad wear indicators The disc brake pads on your vehicle have audible wear indicators. When a brake pad requires replacement, it will make a high pitched scraping or screeching sound when the vehicle is in motion whether or not the brake pedal is depressed. Have the brakes checked as soon as possible if the wear indicator sound is heard. Under some driving or climate conditions, occasional brake squeak, squeal or other noise may be heard. Occasional brake noise during light to moderate stops is normal and does not affect the function or performance of the brake system. The rear drum brakes (if so equipped) do not 8-26 Maintenance and do-it-yourself