Structure Of Tire Pressure Warning Valve And Transmitter - Toyota 2006 PRIUS Manual

NEW FEATURES - TIRE PRESSURE WARNING SYSTEM

5. Structure of Tire Pressure Warning Valve and Transmitter

" The tire pressure warning valve and transmitter is integrated in the air valve of a disc wheel.
" This transmitter operates with a lithium battery, which lasts approx. 10 years. If the battery voltage drops,
the tire pressure warning ECU stores the DTC (Diagnostic Trouble Code) in its memory. If the voltage
drops even further and the transmitter stops working, it stores the DTC in memory and illuminates the tire
pressure warning light to alert the driver.
" Transmitters with four different ID code ranges are used on one vehicle.
" Each transmitter has a built-in semiconductor to directly measure the tire pressure.
" In addition to the measured pressure, the identification data of the transmitter is included in the data that
is transmitted to the tire pressure warning antenna and receiver. This is to enable the tire pressure warning
antenna and receiver to determine that the received data came from its own tires.
" Frequency of the sensor is 314.98 MHz.
— REFERENCE —
" Make sure to install the tire pressure warning valves and transmitters to the disc wheels in accordance with
the prescribed procedure. Failure to do so could result in the incorrect measurement of the tire pressure.
" Make sure to replace the tires in accordance with the prescribed procedure. Failure to do so could damage
the tire pressure warning valves and transmitters.
" For further details regarding the above, refer to the 2006 PRIUS Repair Manual (Pub No. RM01R0U).
Air Hole
Service Tip
" If the lithium battery is depleted, replace the entire tire pressure warning valve and transmitter
assembly.
" When replacing the tire pressure warning valve and transmitter, select them so that all the four
transmitters will have different ID codes.
" A new tire pressure warning valve and transmitter that is available as a service part is in the sleep
mode in its initial state to prevent the battery from depleting. After the tire pressure warning valve
and transmitter and the tire are correctly mounted on the disc wheel, inflating the tire to the
specified pressure causes the sleep mode to cancel.
" For further details regarding the above, refer to the 2006 PRIUS Repair Manual (Pub No.
RM01R0U).
Valve Portion
ID Code
Transmitter Position
01NCH125Y
Disc Wheel Rim
Nut
Grommet
01NCH126Y
33
NF