2008 Toyota Prius Owners Manual - Page 408

4-3. Do-it-yourself maintenance n How to initialize the tire pressure warning system STEP 1 Park the vehicle in safe place and turn the "POWER" switch to OFF mode. While the vehicle is moving, initialization is not performed. STEP 2 Adjust the tire inflation pressure to the specified cold tire inflation pressure level. (→P. 470) Make sure to adjust the tire pressure to the specified cold tire inflation pressure level. The tire pressure warning system will operate based on this pressure level. STEP 3 STEP 4 Turn the "POWER" switch to ON mode. Push and hold the tire pressure warning reset switch until the tire pressure warning light blinks slowly three times. 4 Maintenance and care SET ITY43P018 STEP 5 Wait for a few minutes with the ON mode, and then turn "POWER" switch to OFF mode. 381 PRIUS_U_(L/O_0802)