Tire Pressure Monitoring System (TPMS): Notes

The controlling software for the Tire Pressure Monitoring System (TPMS) is located within a Tire Pressure Monitoring System Module. The software detects the following:

• When the tire pressure is below the recommended low pressure value - under inflated tire.
• The location of the tire on the vehicle that is below the recommended pressure.
• Malfunction warning.

The TPMS system comprises:

• Tire pressure monitoring system module located below the right-hand front seat.
• Tire pressure receiver located near the gear shifter within the floor console.
• Two front initiators positioned forward of the wheels and behind the fender splash shields.
• Two rear initiators positioned rearward of the wheels and assembled on dedicated brackets located behind the fender splash shields.
• Four sensors, each sensor is integral with a tire valve and located within the tire; the space saver spare wheel is not fitted with a sensor.

The four initiators are hard wired to the TPMS module. The initiators transmit 125 KHz Low Frequency (LF) signals to the tire pressure sensors which respond by modifying the mode status within the Radio Frequency (RF) transmission. The 315 or 433 MHz RF signals are detected by the tire pressure receiver which is connected directly to the TPMS module. The received RF signals from the tire pressure sensors are passed to the TPMS module and contain identification, pressure, temperature and acceleration information for each wheel and tire.

The TPMS module communicates with the instrument cluster via the medium speed CAN bus to provide the driver with appropriate warnings. The TPMS module also indicates status or failure of the TPMS or components.