2014 Cadillac CTS Owner Manual - Page 54

2-24 Keys, Doors, and Windows To avoid setting off the alarm by accident, lock the vehicle with the door key after the doors are closed, and always unlock a door with the transmitter or by using the key in the driver door cylinder. Unlocking a door any other way will set off the alarm. If you set off the alarm by accident, turn off the alarm by pressing the unlock button on the transmitter. Immobilizer See Radio Frequency Statement on page 13-15. 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. The vehicle may not start if the key is damaged. The security light in the instrument 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 or the light continues to stay on, try another key. If the engine still does not start with the other key, the vehicle needs service. If the vehicle does start, the first key may be damaged. How to Detect a Tamper Condition If K is pressed and the horn sounds, an attempted break-in occurred while the system was armed. If the alarm has been activated, the THEFT ATTEMPTED message will appear on the DIC. See Security Messages on page 5-43.