To reset the system, first make sure the tire pressures are correct.
Turn the engine on, then press and hold the reset button. You'll find it low and to the right of the steering wheel on the instrument panel.
Hold the button down until the TPMS indicator light in the instrument panel blinks slowly 3 three times.
Wait for several minutes with the engine running, to allow the system to record each tire's pressure, then turn the engine off.
If the light comes on and blinks when you start the car, something may not be working properly, and you should take it to a Toyota dealership to be inspected.
