Lexus CT200H Manual page 515

Tire pressure warning system (if equipped)
Your vehicle is equipped with a tire pressure warning system that uses tire
pressure warning valves and transmitters to detect low tire inflation pres-
sure before serious problems arise.
If the tire pressure drops below a predetermined level, the driver is
warned by a warning light. (P. 571)

Installing tire pressure warning valves and transmitters
When replacing tires or wheels, tire pressure warning valves and trans-
mitters 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. Have tire
pressure warning valve and transmitter ID codes registered by any
authorized Lexus dealer or repairer, or another duly qualified and
equipped professional. (P. 512)

Initializing the tire pressure warning system

The tire pressure warning system must be initialized in the following
circumstances:

Vehicles with 17 inch tires: When rotating front and rear tires which
have different tire inflation pressures

When the tire inflation pressure is changed such as when changing
traveling speed or load weight.

When changing the tire size
When the tire pressure warning system is initialized, the current tire
inflation pressure is set as the benchmark pressure.
CT200h_OM_OM76102E_(EE)
7-3. Do-it-yourself maintenance
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