2008 Toyota Sienna Owners Manual - Page 262

08 SIENNA_U (L/O 0801) Parking brake CAUTION 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. Type A If the tire pressure warning light does not blink slowly three times when you push and hold the tire pressure warning reset switch, initialization has failed and the tire pressure warning system may not work properly. In this case, initialize the system again. If initialization cannot be performed, have the system checked at your Toyota dealer. Type B 221 2008 SIENNA from Aug. '08 Prod. (OM45455U)