Lexus 2013 IS250 Owner's Manual page 445

430
7-3. Do-it-yourself maintenance

When initialization of the tire pressure warning system has failed (vehicles with
the tire pressure warning system)
Initialization can be completed in a few minutes. However, in the following
cases, the settings have not been recorded and the system will not operate prop-
erly. If repeated attempts to record tire inflation pressure settings are unsuccess-
ful, have the vehicle inspected by any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.

When operating the tire pressure warning reset switch, the tire pressure warning
light does not blink 3 times.

After carrying out the initialization procedure, the tire pressure warning light
blinks for 1 minute then stays on after driving for 20 minutes.
IS250_EE(OM53B11E)