Premium Tire Pressure Monitoring

The operation and lamp/chime strategy of the base tire pressure monitoring system also applies to the premium TPMS, but the premium TPMS can display text messages and a tire pressure graphic display on the information cluster. If a low pressure condition is detected, in addition to a chime and indicator lamp turning ON, a graphic display of the pressure values with the low tires flashing will appear in the electronic vehicle information center. Once pressure in the suspect tires raises above the low pressure (lamp) OFF threshold (see placard table below), the lamp will go out once the WIN receives a valid transmission from the sensor. If a system fault is detected, in addition to a chime and a indicator lamp flashing, a "Check TPM System" text message will be displayed in the instrument cluster, and the tire pressure graphic display will have "- -" in place of the pressure value. After the flash sequence, the TPM indicator lamp will remain illuminated. The system will return to normal once the WIN receives a valid transmission from that sensor location.

The Premium TPMS determines the location of the tire pressure sensors by using transponders located in three of the four wheel wells on the vehicle. A fourth transponder is not necessary in the remaining wheel well due to the process of elimination theory. Once the system knows the location of the first three sensors, it assumes the location of the fourth tire pressure sensor, and updates the graphic display when necessary.

For both the premium and base TPM, the recommended "Placard Pressure", "Low-pressure Threshold" (Low Pressure ON) and "Hysteresis Pressure" values for the tires installed on the vehicle, are learned by the WIN from the TIPM configuration during the initial manufacturing plant process, or during a service procedure, as required. The WIN upon learning the placard pressure via the bus (through a matrix within the WIN software) applies the appropriate "Low Pressure Threshold" and "Hysteresis Pressure" values.

To determine the pressure thresholds for a vehicle, refer to the Tire Inflation Pressure Placard Label, and then apply the placard pressure to the following table. The low pressure OFF threshold is defined as the low pressure ON threshold plus the hysteresis pressure value.

For further information, refer to the Owners Manual or the Appropriate Diagnostic Information.