Tire Pressure Monitoring System
You’ll know when to fill up those tires
Did you ever wonder how the Tire Pressure Monitoring System works? Let me explain it to you.
The components of the Tire Pressure Monitoring system are:
- Tire Pressure sensors
- Tire Pressure Control Unit
- Low Pressure Indicator
- TPMS Indicator
The system contains a tire pressure monitoring system inside each tire, and an INITIATOR under each wheel well. Anytime the engine is running, the TPMS control unit monitors wireless signals on all four tires and the system continuously. If it detects low pressure, it alerts the driver by turning on the LOW PRESSURE INDICATOR for the appropriate tire on the multi-information TPMS INDICATOR display.
The TIRE PRESSURE SENSOR is a transmitter integrated into the filler valve on each tire. The sensor transmits a signal to each initiator when the tire pressure is less than 24 PSI. The wheels are constructed with a counterweight opposite the transmitter to compensate for the added weight of the transmitter. Only wheels marked with a “PAX system” mark on them will work on this system. Each pressure sensor transmits its own unique signal ID to the initiators, which are wired into the control unit. The unit memorizes the signal from each wheel sensor. The control unit knows the ID of each wheel, so that if the tires are rotated, the control unit knows where the tires are located on the vehicle to prevent confusion in the system.
When the vehicle is running, a radio frequency band wave signal is transmitted continuously from the tire pressure sensor to the initiator to the control unit in the vehicle.