2008 Toyota Prius Owners Manual - Page 411

4-3. Do-it-yourself maintenance n If you push the tire pressure reset switch accidentally If initialization is performed, adjust the tire inflation pressure to the specified level and initialize the system again. n When the initialization of the tire pressure warning system has failed Initialization can be completed in a few minutes. However, in the following cases, the settings have not been recorded and the system will not operate properly. If repeated attempts to record tire inflation pressure settings are unsuccessful, have the vehicle inspected by your Toyota dealer. l When operating the tire pressure warning reset switch, the warning light does not flash (The tires cannot be initializes whiled the vehicle is moving.). l After driving for a certain period of time since the initialization has been completed, the warning light flashes. n Routine tire inflation pressure checks The tire pressure warning system does not replace routine tire inflation pressure checks. Make sure to check tire inflation pressure as part of your routine of daily vehicle checks. 384 PRIUS_U_(L/O_0802)