2003 Toyota Sienna Owners Manual - Page 157

03 SIENNA_U (L/O 0207) 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. 4. With the vehicle stopped, push the reset switch on the left lower instrument panel and hold it until the low tire pressure warning light blinks for three times. 5. The initial adjustment is completed after driving at the speeds of 30 km/h (19 mph) or over for about total 8 hours, when the tire pressure warning system detects the normal tire pressures. Do not push the reset switch without adjusting the tire pressure to the specified level. Otherwise, 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. If you push the reset switch while the vehicle is moving, the initial adjustment is not performed. If the low tire pressure warning light does not blink when you push and hold the reset switch, have the low pressure warning system checked at your Toyota dealer. 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 than specified, or tire pressure is suddenly reduced due to bursts or other causes. TIRE PRESSURE RESET SWITCH WARNING SYSTEM 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. Pushing this reset switch after replacing or rotating tires or wheels memories the present tire condition as a standard. After replacing or rotating the tires or wheels, perform the initial adjustment as follows. 1. Park the vehicle at a safe place and apply the parking brake. Stop the engine. 2. Adjust pressures of all the installed tires to the specified level. (See "Tires" in Section 8.) 3. Turn the ignition key to "ON". 2003 MY SIENNA (OM45410U) 157