2002 Toyota Sienna Owners Manual - Page 155

02 SIENNA_U (L/O 0107) Tire pressure warning system The tire pressure warning system is designed to provide warning when tire pressure of any one of the tires is critically reduced while the vehicle is moving. The low tire pressure warning light comes on to inform you that such low tire pressure may hamper driving. This system is not designed to operate when the vehicle is stopped. Therefore, check the tire pressures regularly. The recommended cold tire pressures, tire size and the vehicle capacity weight are on the tire pressure label. (For instruction, see "Checking tire pressure" in Section 7 −2.) Installed tires should be of the specified size. They should be of the same size and construction. If tires other than of the specified size are used, or if tires of different sizes or constructions are mixed, the tire pressure warning system will not function properly. The tire pressure warning system does not function properly under certain circumstances. In the following cases, the low tire pressure warning light may not come on even if the tire pressure is low, or it may come on when the tire pressure is actually normal. D The tread wear is uneven among the installed tires. D A compact spare tire, snow tires, or tire chains are used. D The tire pressure is excessively higher LOW TIRE PRESSURE WARNING LIGHT This light comes on when the ignition key is turned to the "ON" position. It goes off after a few seconds. This indicates that the tire pressure warning system is functioning properly. If the low tire pressure warning light comes on while driving, adjust tire pressure to the specified level. (See "Tires" in Section 8.) After the tire pressure is adjusted, the light should go off after driving at about more than 30 km/h (19 mph) for some time. If the light still remains, have the tire pressure warning system checked at your Toyota dealer. 2002 MY SIENNA_U (OM45407U) than specified, or tire pressure is suddenly reduced due to bursts or other causes. D The vehicle is driven on a slippery road surface such as rough road and frozen road. D The vehicle speed is less than 30 km/h (19 mph) or more than 100 km/h (62 mph), and the driving duration is less than 5 minutes. 155