Lexus LS 600h L 2012 Owner's Manual page 461

4-3. Do-it-yourself maintenance
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How to initialize the tire pressure warning system
Park the vehicle in a safe place and turn the "POWER" switch
STEP 1
OFF.
While the vehicle is moving, initialization is not performed.
Adjust the tire inflation pressure to the specified cold tire inflation
STEP 2
pressure level. (→P. 556)
Make sure to adjust the tire pressure to the specified cold tire inflation
pressure level. The tire pressure warning system will operate based on
this pressure level.
Turn the "POWER" switch to ON mode.
STEP 3
STEP 4
Wait a few minutes for the multi-information display to show the
STEP 5
tire inflation pressures (5 tires), and then turn the "POWER"
switch OFF.
458
Push and hold the tire pressure
warning reset switch until the tire
pressure warning light blinks
slowly 3 times and a message
appears on the multi-information
display.
The switch is under the driver's side
instrument panel, facing the floor
above the accelerator pedal.