Lexus SC 430 2001 Owner's Manual page 238

4-3. Do-it-yourself maintenance
STEP 4
Wait for a few minutes with the engine switch "ON", and then turn
STEP 5
the engine switch to "OFF" position.
Registering and selecting ID codes
■ 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 tire pressure
warning select switch.
There are 2 settings:
"MAIN" position: The ID code of the tire pressure warning valve &
transmitter on the tires originally installed on the vehicle is registered.
"2nd" position: The code is not registered. When you replace a new set
of tires, purchase tire pressure warning valve & transmitters from your
Lexus dealer and have the new ID code registered by your Lexus
dealer.
238
Push and hold the tire pressure
warning reset switch until the tire
pressure warning light blinks
slowly three times.