Tires & Wheels (Service Information): Operation
Tire Pressure Monitoring (TPM) system thresholds have been established for the original tire size equipped on the vehicle. Use the original tire size to maintain system accuracy.
The Radio Frequency Hub (RFH) Module receives the radio signals from the tire pressure sensors and sends the relevant values to the other modules via CAN-C. The RFH identifies the sensor position, receives the sensor data, compares the pressure data with the standard pressure values stored in the non-volatile memory, determines whether there is a problem in the tire pressure and stores the warnings regarding tire pressure and system faults.
The RFH uses the RF data from the TPM sensor and the Antilock Brake System (ABS) module wheel speed data to determine the location of each tire pressure sensor.
When a sensor is installed on a wheel, the RFH can automatically identify the sensor and its location during the first ensuing drive cycle. Identification will take approximately 20 minutes, however, the speed of the vehicle must exceed 24 km/h (15 mph). The TPM-RKE 9936 analyzer can also be used to program the new sensor identification number in the RFH.
For the removal and installation of the RFH. Refer to MODULE, RADIO FREQUENCY (RF HUB), REMOVAL .
The sensor identification (ID) can also be programmed using the diagnostic scan tool and the TPM-RKE 9936 analyzer. Scan each TPM sensor at each wheel and enter each sensor ID in the correct location:
- Left Front
- Left Rear
- Right Front
- Right Rear
Connect the diagnostic scan tool, then follow the programming steps outlined in the diagnostic scan tool.