Tire Pressure Sensor: Description and Operation

TIRE PRESSURE SENSOR/TRANSMITTER
The system has four individual Tire Pressure Sensor/Transmitters, one mounted in each wheel. The valve stem is integral with the pressure sensor/transmitter. Each tire pressure sensor/ transmitter serves three functions:
1. It is used as a valve stem to inflate and deflate the tire.
2. It periodically measures tire pressure. (Approximately every 30 seconds).
3. It transmits the tire pressure value to the LTPW Module in the vehicle. (Approximately every 60 seconds or if tire pressure changes by 1 PSI between transmissions).

The Tire Pressure Sensor/Transmitter unit consists of:
Three volt battery
Pressure sensor
Roll switch (speed activated)
Reed switch (magnet activated)
Radio Frequency (RF) transmitter.

CAUTION: Inflatable tire sealants for fixing a slow leak or flat tire should be avoided as the sealant will clog the pressure sensing hole in the transmitter.