2010 Cadillac CTS Owner's Manual - Page 30

1-24 Keys, Doors and Windows How to Detect a Tamper Condition If K is pressed and the horn sounds, an attempted break-in has occurred while the system was armed. If the alarm has been activated, the Theft Attempted message will appear on the DIC. See Key and Lock Messages on page 4‑42 for additional information. Immobilizer Operation (Key Access) This vehicle has a passive theft-deterrent system. The system does not have to be manually armed or disarmed. The vehicle is automatically immobilized when the key is removed from the ignition. The system is automatically disarmed when the vehicle is started with the correct key. The key uses a transponder that matches an immobilizer control unit in the vehicle and automatically disarms the system. Only the correct key starts the vehicle. The vehicle may not start if the key is damaged. The security light, located in the instrument panel cluster, comes on if there is a problem with arming or disarming the theft-deterrent system. When trying to start the vehicle, the security light comes on briefly when the ignition is turned on. If the engine does not start and the security light stays on there is a problem with the system. Turn the ignition off and try again. If the engine still does not start, and the key appears to be undamaged, try another ignition key. If the engine still does not start and the light continues to stay on try another key. Immobilizer See Radio Frequency Statement on page 12‑16 for information regarding Part 15 of the Federal Communications Commission (FCC) Rules and RSS-210/211 of Industry and Science Canada.