Toyota 2008 Prius Quick Reference Manual page 407

4-3. Do-it-yourself maintenance
Installing tire pressure warning valves and transmitters
When replacing tires or wheels, tire pressure warning valves and
transmitters must also be installed.
When new tire pressure warning valves and transmitters are
installed, new sensor ID codes must be registered in the tire pressure
warning computer and tire pressure warning system must be initial-
ized.
Initializing the tire pressure warning system
The tire pressure warning system must be initialized in the fol-
n
lowing circumstances:
l When rotating the tires on vehicles differing with front and rear
tire inflation pressures.
l When changing the tire inflation pressure by changing traveling
speed or load weight, etc.
l When changing the tire size.
When the tire pressure warning system is initialized, the current
tire inflation pressure is set as the pressure benchmark.
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