2004 Lexus IS 300 Owners Manual - Page 369

03 07.09 CHASSIS You should check the tire inflation pressure every two weeks, or at least once a month. And don't forget the spare. The inflation pressure for the spare tire should be adjusted according to the conditions in the table on page 342, 344 or 345. The following instructions for checking tire inflation pressure should be observed: D The inflation pressure should be checked only when the tires are cold. If your vehicle has been parked for at least 3 hours and has not been driven for more than 1.5 km or 1 mile since, you will get an accurate cold tire inflation pressure reading. D Always use a tire pressure gauge. The appearance of the tire can be misleading. Besides, tire inflation pressures that are even just a few pounds off can degrade ride and handling. D Do not bleed or reduce tire inflation pressure after driving. It is normal for the tire inflation pressure to be higher after driving. D Never exceed the vehicle capacity weight. The passengers and luggage weight should be located so that the vehicle is balanced. Inspection and adjustment procedure SV63010 " 1 Tire valve 2 Tire pressure gauge 1. Remove the tire valve cap. 2. Press the tip of the tire pressure gauge to the tire valve. 3. Read the pressure using a graduation of the gauge. 4. In case that the tire inflation pressure is not within the prescribed range, insert the compressed air from the valve. In case of applying too much air, press the center of the valve and release the air to adjust. 5. After completing the tire inflation pressure measurement and adjustment, apply soap water to the valve and check the leakage. 6. Install the tire valve cap. CAUTION The inflation pressure for the compact spare tire must be 420 kPa (4.3 kgf/cm2, 4.2 bar, 60 psi). 350