The tire pressure monitor (TPM) system has a radio frequency (RF) transmitting pressure sensor in each wheel/tire assembly. The module receives and translates the data contained in the tire pressure sensor RF transmissions into sensor presence, sensor mode, and tire pressure.

The receiver module receives a radio frequency (RF) transmission from each tire pressure sensor. Each sensor RF transmission contains its own unique identification (ID) code that must be learned into the module memory. Once all 4 IDs have been learned, the module continuously compares IDs received in transmission to its learned IDs to determine if all 4 sensors are present.

The ignition is ON.

The tire pressure sensor battery is depleted.

The Tire Pressure Warning Light is illuminated.

A current DTC will clear when the signal transmission is resumed.

If the displayed tire pressure data did not change within 3 minutes, refer to DTC C2121-C2124 .

Description and Operation

Tire Pressure Monitor Description and Operation

Schematic Reference

Tire Pressure Monitoring System Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

Scan Tool Reference

Control Module References for Scan Tool Information

1. With the scan tool, verify tire pressure sensors ID and locations:

1.1.	Rapidly reduce the tire pressure for each wheel at least 6 psi within 30 seconds. It may take up to 3 minutes for the display to change.

1.2.	Record the sensor ID and location.

⇒	If any of the parameters listed above did not change or are not displayed, replace the suspect tire pressure sensor.

2. Perform the tire pressure sensor learn procedure.
3. Perform the tire pressure system configuration procedure. Verify all 4 sensor locations, IDs, and tire pressures match what the scan tool displays.

⇒	If the scan tool data does not match, replace the Tire Pressure Control Module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.