Tire Pressure Warning System Composition - Toyota 2006 PRIUS Manual

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NEW FEATURES - TIRE PRESSURE WARNING SYSTEM
3. Function of Main Components
Component
Tire Pressure Warning Valve
and Transmitter
Tire Pressure Warning Antenna
and Receiver
Tire Pressure Warning ECU
Speed Sensor
Tire Pressure Warning Light
Tire Pressure Warning Reset
Switch

4. Tire Pressure Warning System Composition

" The tire pressure warning system consists of the tire pressure warning valve and transmitter, tire pressure
warning antenna and receiver, tire pressure warning ECU, tire pressure warning light, and tire pressure
warning reset switch.
" The four tire pressure warning valves and transmitters measure the pressure of the respective tires, and
transmit the ID codes of the transmitters and the measurement results through radio wave signals. The
transmitted signals are received by tire pressure warning antenna and receiver, which is mounted inside
D pillar of right side. The tire pressure warning ECU checks whether the received ID codes match those
that are pre-registered. If the ID codes match, the tire pressure warning ECU compares the measurement
results with the threshold values, and illuminates the tire pressure warning light in the combination meter
if the pressures are below the threshold values.
Integrated in the air valve on the disc wheel, this transmitter measures
the tire pressure and transmits the measured value and an ID code for
identifying the wheel.
Located inside the D pillar of right side, it receives signals from the
transmitters, and transmits them to tire pressure warning ECU.
Recognizes that the signals are from the vehicle's own wheels, based
on the received ID code signals. If the measured values exceed a
specified value, this ECU transmits signals to illuminate the tire
pressure warning light in the combination meter.
Detects the wheel speed of each wheel.
Located in the combination meter, this light informs the driver of a low
tire pressure or a system failure.
If this switch is pressed continuously for 3 seconds or longer, the
system will accept initialization.
Function