Tire Pressure Module: Description and Operation

TIRE PRESSURE MONITORING (TPM)
DESCRIPTION
Some versions of this vehicle are equipped with a Tire Pressure Monitoring (TPM) system. It monitors air pressure in all five tires (includes full-size spare).
There is a sensor (transmitter) in each of the vehicle's five wheels. The system alerts the driver when tire pressure falls outside predetermined thresholds (pressure too low or too high). A message is then displayed on the Electronic Vehicle Information Center (EVIC) located in the overhead console. Tire air pressures in the four road wheels are displayed on the EVIC when chosen. Pressure in the spare tire, although monitored, is not displayed on the EVIC.

OPERATION
The Tire Pressure Monitoring (TPM) system uses wireless technology to monitor tire air pressure levels. Sensors, mounted to each road wheel as part of the valve stem, transmit tire pressure readings to a receiver located in the overhead console. These transmissions occur once every minute at speeds over 20 mph (32 km/h). The tire pressure status is shown on the Electronic Vehicle Information Center (EVIC) display upon demand. The Tire Pressure Monitoring system remains active even if it is not displayed in the EVIC.
If any road tire pressure has exceeded the low or high pressure threshold (refer to chart), the TPM system will display a message on the EVIC and sound a chime. It will then go into the tire pressure display screen and flash the pressure value of the tire that is low or high. This will be displayed for the rest of the ignition cycle, or until either the C/T, MENU, STEP or RESET button is pressed.
If a road tire is replaced by the spare, the TPM system will detect the swap automatically (after the ignition has been cycled) and display "SPARE SWAP DETECTED" along with a chime (This could take up to 10 minutes with the vehicle speed above 20 mph (32 km/h).

NOTE: TPM thresholds have been established for the original tire size equipped on the vehicle.





TPM THRESHOLD PRESSURES