2009 Lexus LS 600h Owners Manual - Page 546

4-3. Do-it-yourself maintenance CAUTION n Using tires of a different size Do not use tires of a different size from those equipped when the vehicle was new, as the front tire steering angle setting is designed for the original tire size. It is dangerous to use an incorrect wheel and tire combination as this may result in reduced vehicle stability. n When initializing the tire pressure warning system Do not push the tire pressure warning reset switch without first adjusting the tire inflation pressure to the specified level. Otherwise, the tire pressure warning light may not come on even if the tire inflation pressure is low, or it may come on when the tire inflation pressure is actually normal. NOTICE n Repairing or replacing tires, wheels and tire pressure warning valves and trans- mitters When removing or fitting the wheels, tires or the tire pressure warning valve and transmitter, contact your Lexus dealer as the tire pressure warning valve and transmitter may be damaged if not handled correctly. n To avoid damaging the tire pressure warning valves and transmitters 4 Maintenance and care Do not use liquid sealants on flat tires. n Driving on rough roads Take particular care when driving on roads with loose surfaces or potholes. These conditions may cause losses in tire inflation pressure, reducing the cushioning ability of the tires. In addition, driving on rough roads may cause damage to the tires themselves, as well as the vehicle's wheels and body. n If tire inflation pressures become low while driving Do not continue driving, or your tires and/or wheels may be ruined. 549