Tire Pressure Monitoring: Operation: Operation: Notes

WARNING: This page is about a different car, the 2015 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

The Tire Pressure Monitoring (TPM) system monitors air pressure in the four road tires, or if the vehicle original equipment includes a full size matching spare, then all five tires. Pressure in the spare tire is not monitored with a compact spare or a "non-matching spare.

LIGHT LOAD SWITCH On the 2500 series base and premium systems there is a "Light Load" switch located on the instrument panel in the center stack. If equipped, these vehicles will have two different recommended tire pressure values depending on the vehicle load/switch setting. The Light Load switch which will allow the driver to change between two different recommended "Placard Pressure", "Low-pressure Threshold" and Hysteresis Pressure Values". These values are stored in the modules non-volatile memory during the initial Manufacturing Plant Process, or during a service procedure, as required. To determine the pressure thresholds for a vehicle, refer to the Tire Inflation Pressure (Placard) Label or Supplemental Tire Pressure Information 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.