GX 470 V8-4.7L (2UZ-FE) (2004)
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Use a high quality accurate tire pressure gauge, and check its accuracy regularly.
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Consider the difference in the air temperature in the workshop and the lowest ambient temperature you expect in the next few weeks (especially in
winter).
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Use the chart (Figure 1) to compensate for temperature of the tires when you adjust the pressure.
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Use temperature compensation Example 1 for the spare tire.
Temperature Compensation Example 1
Assumed conditions:
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The vehicle's spare tire pressure is being adjusted.
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The GX 470 has been parked overnight outside your shop (vehicle has "cold" tires).
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Your workshop temperature is 68°F (20°C), and you expect the lowest ambient temperature in your area to be 14°F (-10°C).
Calculations:
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Compute the temperature difference between the seasonable lowest temperature and the workshop temperature: 68°F (20°C) - [14°F (-10°C)] = 54°F
or 30°C.
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Using the tire pressure chart (Figure 1), find the intersection of the cold tire line at the point corresponding to 54°F or 30°C, and read off the value on
the tire pressure change axis. In this case it would be about 4.6 PSI.
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Compute the actual tire pressure the tires should be filled to:
31.9 + 4.6 PSI = 36.5 PSI.
In this example the tires would need to be filled to 37 PSI to compensate for the seasonal temperature difference.
Temperature Compensation Example 2
Assumed conditions:
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The GX 470 has been driven to your shop on surface streets for about 30 minutes (vehicle has "warm" tires).
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Your workshop temperature is 68°F (20°C), and you expect the lowest ambient temperature in your area to be 14°F (-10°C).
Calculations:
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Compute the temperature difference between the seasonable lowest temperature and the workshop temperature: 68°F (20°C) - [14°F (-10°C)] = 54°F
or 30°C.
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Using the tire pressure chart (Figure 1), find the intersection of the warm tire line at the point corresponding to 54°F or 30°C, and read off the value
on the tire pressure change axis. In this case it would be about 6.7 PSI.
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Compute the actual tire pressure the tires should be filled to:
