2009 Cadillac STS-V Owner's Manual - Page 396

TPMS Sensor Matching Process Each TPMS sensor has a unique identification code. Any time you replace one or more of the TPMS sensors or rotate your vehicle's tires, the identification codes will need to be matched to the new tire/wheel position. The sensors are matched to the tire/wheel positions in the following order: driver side front tire, passenger side front tire, passenger side rear tire, and driver side rear tire using a TPMS diagnostic tool. See your dealer/retailer for service. The TPMS sensors may also be matched to each tire/wheel position by increasing or decreasing the tire's air pressure. When increasing the tire's pressure, do not exceed the maximum inflation pressure indicated on the tire's sidewall. If using this method to match TPMS sensors, the complete procedure outlined below must be performed within 15 minutes of the vehicle being stationary. To decrease air-pressure out of a tire you can use the pointed end of the valve cap, a pencil-style air pressure gage, or a key. You will have one minute to match the first tire/wheel position, and five minutes overall, to match all four tire/wheel positions. If it takes longer than one minute to match the first tire and wheel, or more than five minutes to match all four tire/wheel positions, the matching process stops and you will need to start over. 5-70 The TPM matching process is outlined below: 1. Set the parking brake. 2. Press the push-button ignition switch to Acc. 3. Using the keyless access transmitter, lock and unlock the vehicle's doors. 4. Press the lock and unlock buttons, at the same time, on the keyless access transmitter. The horn sounds twice, indicating that the TPMS is ready, and the sensor matching process can begin. 5. Start with the driver side front tire. 6. Remove the valve cap from the valve stem. Activate the TPMS sensor by increasing or decreasing the tire's air pressure for five seconds, or until a horn chirp sounds. The horn chirp, which may take up to 30 seconds to sound, confirms that the sensor identification code has been matched to this tire position. 7. Proceed to the passenger side front tire, and repeat the procedure in Step 6. 8. Proceed to the passenger side rear tire, and repeat the procedure in Step 6. 9. Proceed to the driver side rear tire, and repeat the procedure in Step 6. 10. After hearing the confirming single horn chirp for the driver side rear tire, a double horn chirp will sound to signal the tire matching mode is no longer active. Press the push-button ignition switch to Acc.