DO-IT-YOURSELF MAINTENANCE Engine and Chassis -> Checking tire inflation pressure for Your Toyota Prius 4 Door Second Generation (2004-2009)

Checking tire inflation  
pressure  
Keep your tire inflation pressures  
at the proper level.  
Always use a tire inflation pres-  
sure gauge. The appearance of  
a tire can be misleading. Besides,  
tire inflation pressures that are  
even just a few pounds off can de-  
grade ride and handling.  
The recommended cold tire inflation  
pressures, tire sizes and the com-  
bined weight of occupants and cargo  
(vehicle capacity weight) are de-  
scribed on pages 426 and 429. They  
are also described on the tire and  
loading information label as shown.  
Take special care when adding  
air to the compact spare tire.  
The smaller tire size can gain  
pressure very quickly. Add com-  
pressed air in small quantities and  
check the pressure often until it  
reaches the specified pressure.  
You should check the tire inflation  
pressure every two weeks, or at least  
once a month. And do not forget the  
spare!  
Do not bleed or reduce tire  
inflation pressure after driving.  
It is normal for the tire inflation  
pressure to be higher after driving.  
The following instructions for  
checking tire inflation pressure  
should be observed:  
The  
pressure  
should  
be  
Never exceed the vehicle capac-  
ity weight. Passenger and lug-  
gage weight should be located so  
that the vehicle is balanced.  
checked only when the tires are  
cold. If your vehicle has been  
parked for at least 3 hours and has  
not been driven for more than 1.5  
km or 1 mile since, you will get  
an accurate cold tire inflation pres-  
sure reading.  
405  
5. After completing the tire inflation  
pressure measurement and adjust-  
ment, apply soapy water to the  
valve and check for leakage.  
Tire inflation  
pressure gauge  
CAUTION  
Keep your tires properly inflated.  
Otherwise, the following condi-  
tions may occur and cause an ac-  
cident resulting in death or seri-  
ous injuries.  
6. Install the tire valve cap.  
If a gauge and air pump are not avail-  
able, have your vehicle checked by  
your Toyota dealer.  
Low tire pressure (underinfla-  
tion)—  
CAUTION  
Excessive wear  
Uneven wear  
Poor handling  
Be sure to reinstall the tire valve  
caps. Without the valve caps, dirt  
or moisture could get into the  
valve core and cause air leakage.  
If the caps have been lost, have  
new ones put on as soon as pos-  
sible.  
INSPECTION AND ADJUSTMENT  
PROCEDURE  
Possibility of blowouts from an  
overheated tire  
1. Remove the tire valve cap.  
Poor sealing of the tire bead  
2. Press the tip of the tire inflation  
pressure gauge to the tire valve.  
Wheel deformation and/or tire  
separation  
3. Read the pressure using the grad-  
uations of the gauge.  
Incorrect tire inflation pressure  
may waste fuel, reduce the comfort  
of driving, reduce tire life and  
make your vehicle less safe to  
drive.  
A greater possibility of tire  
damage from road hazards  
4. In case the tire inflation pressure  
is not within the prescribed range,  
insert the compressed air from the  
valve. In case of applying too much  
air, press the center of the valve  
and release the air to adjust.  
If a tire frequently needs refilling,  
have it checked by your Toyota deal-  
er.  
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