516 7-3. Do-it-yourself maintenance
lTire inflation pressure changes with temperature. The displayed values may also be different from the values measured using a tire pressure gauge.
n Situations in which the tire pressure warning system may
not operate properly
lIn the following cases, the tire pressure warning system may not
operate properly.
• If non-genuine SUBARU wheels
are used.
• A tire has been replaced with a tire that is not an OE( Original
Equipment) tire.
• A tire has been replaced with a tire that is not of the specified size.
• Tire chains etc. are equipped.
• If a window tint that affects the radio wave signals is installed.
• If there is a lot of snow or ice on the vehicle, particularly around the wheels or wheel housings.
• If the tire inflation pressure is extremely higher than the specified level.
• If wheels without tire pressure warning valves and transmitters are used.
• If the ID code on the tire pressure warning valves and transmitters is not registered in the tire pressure
warning computer.
lPerformance may be affected in the following situations.
• Near a TV tower, electric power plant, gas station, radio station,
large display, airport or other facility that generates strong radio waves or electrical noise
• When carrying a portable radio, cellular phone, cordless phone or other wireless communication device
If tire position information is not correctly displayed due to the radio wave conditions, the display may be corrected by driving and changing the radio wave conditions.
lWhen the vehicle is parked, the time taken for the warning to start or go off could be extended.
lWhen tire inflation pressure declines rapidly for example when a tire has burst, the warning may not function.
Installing tire pressure warning valves and transmitters
When replacing tires or wheels, tire pressure warning valves and transmitters must also be installed.
When new tire pressure warning valves and transmitters are installed, new ID codes must be registered in the tire pressure warning computer and the tire pressure warning system must be initialized.( �P. 520)
nWhen replacing the tires and wheels
If the ID code of the tire pressure warning valve and transmitter is not
registered, the tire pressure warning system will not work properly. After
driving for about 10 minutes, the tire pressure warning light blinks for 1
minute and stays on to indicate a system malfunction.