Toyota FJ CRUISER Owner's Manual page 439

4-3. Do-it-yourself maintenance
Replacement method
■
■ Checking interval
Inspect and replace the air conditioning filter according to the maintenance
schedule. In dusty areas or areas with heavy traffic flow, early replacement
may be required. (P. 393)
■ If air flow from the vents decreases dramatically
The filter may be clogged. Check the filter and replace if necessary.
NOTICE
When using the air conditioning system
■
Make sure that a filter is always installed.
Using the air conditioning system without a filter may cause damage to the
system.
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FJCRUISER_OM_General_OM35B53W
Remove the filter case.
Remove the air conditioning
filter and replace it with a new
one.
The"UP" marks shown on the
filter should be pointing up.