Toyota PRIUS 2014 Owner's Manual page 132

5. GPS (GLOBAL POSITIONING SYSTEM)
INFORMATION
●
This navigation system uses tire turning
data and is designed to work with fac-
tory-specified tires for the vehicle.
Installing tires that are larger or smaller
than the originally equipped diameter
may cause inaccurate display of the cur-
rent position. The tire pressure also
affects the diameter of the tires, so make
sure that the tire pressure of all 4 tires is
correct.
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