1999 Nissan Pathfinder Owner's Manual - Page 242

Emission control system maintenance Additional information on the following items with * is found in the "8. Do-ityourself" section. Drive belts*: Check drive belts for wear, fraying or cracking and also for proper tension. Replace the drive belts if found damaged. Air filter: Under normal driving conditions, the air cleaner filter should be replaced in accordance with the maintenance schedule. However, driving the vehicle in dusty areas may cause more rapid clogging of the element. Consequently, the element may have to be replaced more frequently. EVAP vapor lines: Check vapor lines and connections for failure or looseness. If leaks are found, replace the lines. Fuel lines: Check the fuel hoses, piping and connections for leaks, looseness or deterioration. Replace any parts if they are damaged. Fuel filter: If the vehicle is operated under extremely adverse weather conditions or in areas where ambient temperatures are either extremely low or extremely high, the filter might become clogged. In such an event, replace the filter immediately. Engine coolant*: Flush and refill the cooling system. Engine oil & oil filter*: Under normal driving conditions, the engine oil and oil filter should be replaced in accordance with the maintenance schedule. However, under severe driving conditions, they may have to be replaced more frequently. Spark plugs*: Replace with new plugs having the correct heat range. Timing belt: Replace the timing belt for driving the camshafts. Chassis and body maintenance Brake lines & cables: Check the brake lines and hoses (including brake booster vacuum hoses, connections & check valve) and parking brake cables for proper attachment, leaks, cracks, chafing, abrasion, deterioration, etc. Brake pads, rotors, drums & linings: Check these and the other neighboring brake components for wear, deterioration and leaks. Under severe driving conditions, they may have to be inspected more frequently. Manual and automatic transmission, transfer & differential gear fluid: Visually inspect for signs of leakage and replace oil for limited-slip differential. Under severe driving conditions, the oil should be replaced at the specified interval. Steering gear, linkage & transfer gear, axle & suspension parts & drive axle shaft boots: Check for damage, looseness and leakage of oil or grease. Under severe driving conditions, more frequent inspection should be performed. Maintenance 9-11