Theory Of Operation
When this DTC is active the Radio Frequency Hub (RF Hub) Module will enter a deactivation mode (Winter Mode) and the TPM system becomes deactivated. If winter tires and wheel assemblies are installed no repair is required.
The Radio Frequency Hub (RF Hub) Module determines the TPM Sensor positions by performing the vehicle Tire Pressure Monitoring (TPM) Sensor locate procedure. This procedure is run after the vehicle has been stationary for 20 minutes. After driving the vehicle at speeds greater than 32 km/h (20 mph) for a minimum of 10 minutes without the TPM Sensor installed, the RF Hub Module sends a bus message commanding the TPM telltale lamp to flash for 75 seconds. After the 75 seconds of flashing, the lamp will remain on solid and a chime will be heard. The message center will display SERVICE TPM SYSTEM for five seconds and shut off, all while the tire pressure values will be displayed as dashes. After the ignition has been cycled off and on the TPM telltail lamp will remain off, the message center will no longer display SERVICE TPM SYSTEM, and the tire pressures continue to be displayed as dashes.