Toyota 2010 Prius Owner's Manual page 475

4-3. Do-it-yourself maintenance
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Inspection and adjustment procedure
STEP 1
Remove the tire valve cap.
STEP 2
Press the tip of the tire pressure gauge onto the tire valve.
STEP 3
Read the pressure using the graduations of the gauge.
STEP 4
If the tire inflation pressure is not within the recommended
levels, adjust tire pressure.
If you add too much air, press the center of the valve to
lower.
STEP 5
After completing the tire inflation pressure measurement
and adjustment, apply soapy water to the valve and check
for leakage.
STEP 6
Reinstall the tire valve cap.
.
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Tire inflation pressure check interval
You should check tire inflation pressure every 2 weeks, or at least once a
month.
Do not forget to check the spare.
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Tire valve
Tire pressure gauge
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