2012 Toyota Prius Owners Manual - Page 830

6 -2 . Cust om iza t ion I t e m s t o init ia lize The following items must be initialized for normal system operation after such cases as the 12-volt battery being reconnected, or maintenance being performed on the vehicle: Item Maintenance data (except Canada) When to initialize After the maintenance is performed • When rotating the tires on vehicles with differing front and rear tire inflation pressures • When changing tire pressure (such as when changing traveling speed, load weight, etc.) • When changing the tire size Reference P. 349 Tire pressure warning system P. 381 522