Lexus IS F 2012 Owner's Manual page 413

Registering and selecting ID codes
To select tire pressure warning valve and transmitter ID codes, use the
satellite switch. (P. 343)
■ Registering ID codes
2 sets of tire pressure warning valve and transmitter ID codes can be
registered. Once a second set of tires is registered at "2ND", you can
switch between tire set settings simply by pressing the "ON/OFF" but-
ton.
There are 2 settings:
"MAIN" position: The ID code of the tire pressure warning valve and
"2ND" position: The ID code is not registered. When you replace a
transmitter on the tires originally installed on the
vehicle is registered.
new set of tires, purchase tire pressure warning
valves and transmitters from your Lexus dealer and
have the new ID code registered by your Lexus
dealer.
4-3. Do-it-yourself maintenance
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