2006 Nissan Xterra Owner's Manual - Page 240

PARKING BRAKE AND BRAKE PEDAL WARNING See a NISSAN dealer for a brake system check if the brake pedal height does not return to normal. Brake pad wear indicators The disc brake pads on your vehicle have audible wear indicators. When a brake pad requires replacement, a high pitched scraping or screeching sound will be heard when the vehicle is in motion. The noise will be heard 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. Proper brake inspection intervals should be followed. For more information regarding brake inspections, see the appropriate maintenance schedule information in the "NISSAN Service and Maintenance Guide". LDI0476 WDI0197 CHECKING PARKING BRAKE From the released position, pull the parking brake lever up slowly and firmly. If the number of clicks is out of the range listed, see a NISSAN dealer. Range: 6-8 clicks under pulling force of 44 lb (196 N). CHECKING BRAKE PEDAL With the engine running, check the distance A between the upper surface of the pedal and the metal floor. If it is out of the range listed, see a NISSAN dealer. Range: 4.1-4.8 in (103-123 mm) under a depressing force of 110 lb (490 N). Self-adjusting brakes Your vehicle is equipped with self-adjusting brakes. The front and rear disc-type brakes self-adjust every time the brake pedal is applied. 8-22 Maintenance and do-it-yourself