Description And Operation

DESCRIPTION 

The Tire Pressure Monitoring (TPM) checks the pressure and temperature of the tires when the ignition is in ON or RUN positions and sends the information to the Radio Frequency Hub (RFH) via the CAN.

In particular, the TPM system activates a low pressure warning indicator on the instrument panel.

TPM functions are performed by the RFH and are transmitted at 433MHz, in addition to the TPM function the RFH performs the following functions:

• Locking/unlocking doors using the signals of the remote control buttons;
• Passive Entry via the signals from five antennas.

The system consists of four sensors, one installed on each road wheel that sends a Radio Frequency (RF) signal to the RFH then sent to the Body Control Module (BCM) via Controller Area Network (CAN).

Every time the ignition system is moved to the run position, the control unit conducts an initial check, when the vehicle moves, the sensors measure the pressure and temperature and transmits the initial status within 5 seconds to check tire function.

If an insufficient pressure value is detected on one or more tires, the warning light on the instrument panel switches ON, a dedicated message is shown on the display and an acoustic warning is emitted. The system also highlights the tire or tires with insufficient pressure graphically.