TPMS Function

NOTE: When directed to train any TPMS sensors, use only the sensor training procedure outlined in this article. Do not use the TPMS reset procedure outlined in the Owner's Literature as this procedure does not program new sensors to the module.

The TPMS uses 4 valve stem mounted sensors to monitor tire pressure. These sensors transmit tire pressure data to the TPM module. Each individual sensor contains a battery and transmits tire pressure data to the TPM module. The TPM module is a radio receiver that collects the tire pressure data and sends the information along the MS-CAN to the BCM. All TPMS functions are controlled by the BCM. The TPMS sensors are trained to the BCM, which records the unique identifier for each sensor. The BCM records the location of each TPMS sensor based on the training order and compares the tire pressure data sent by the sensors with a programmed tire pressure. This programmed pressure is specified on the VC label. If the tire pressure deviates from the programmed tire pressure the BCM, using the HS-CAN, signals the IPC to illuminate the TPMS warning indicator and display a message in the message center. The programmed tire pressure cannot be changed.

The scan tool is a useful tool in diagnosing TPMS concerns and may be used to verify if the TPMS sensors are transmitting accurate tire pressure data by comparing the PID tire pressure data in the BCM to the actual tire pressure using a digital tire pressure gauge.

Following a tire rotation on vehicles with different front and rear tire pressures, the tire pressures must be adjusted and the TPMS sensors must be trained. Refer to Tire Pressure Monitoring System (TPMS) Sensor Training .