2011 Lexus IS 350 User Guide - Page 478

5-2. Steps to take in an emergency n If the open retractable hardtop warning buzzer sounds Immediately stop the vehicle in a safe place and open or close the retractable hardtop fully. CAUTION n When the electric power steering warning light comes on The steering wheel may become extremely heavy. If the steering wheel becomes heavier than usual when operating, firmly hold and operate it using more force than usual. n If the tire pressure warning light comes on Be sure to observe the following precautions. Failure to do so could cause loss of vehicle control and result in death or serious injury. Vehicles with run-flat tires • Decelerate to the lowest appropriate speed as soon as possible. Do not drive over 50 mph (80 km/h). • Check and adjust the tire inflation pressure immediately. • If the tire pressure warning light comes on even after tire inflation pressure adjustment, it is probable that you have a flat tire. Have the tire replaced by the nearest Lexus dealer. • Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could lose control of the steering wheel or the brakes. Vehicles with standard tires • Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pressure immediately. • If the tire pressure warning light comes on even after tire inflation pressure adjustment, it is probable that you have a flat tire. Check the tires. If the tire is flat, change to the spare tire and have the flat tire repaired by the nearest Lexus dealer. • Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could lose control of the steering wheel or the brakes. n If a blowout or sudden air leakage should occur 5 When trouble arises The tire pressure warning system may not activate immediately. 489