Black plate (18,1)Cadillac XTS Owner Manual (GMNA-Localizing-U.S./Canada-6006999) -2014 - CRC - 9/11/132-18 Keys, Doors, and WindowsHow to Detect a TamperConditionIf K is pressed and the horn chirpsthree times, the alarm was activatedwhile the alarm system was armed.If the alarm system has beenactivated, a message will appear onthe DIC. See Security Messages onpage 5-45.ImmobilizerSee Radio Frequency Statement onpage 13-15.Immobilizer OperationThis vehicle has a passivetheft-deterrent system.The system does not have to bemanually armed or disarmed.The vehicle is automaticallyimmobilized when the vehicle isturned off.The immobilization system isdisarmed when the pushbutton startis activated to enter the ACC/ACCESSORY mode or the ON/RUN/START mode and a validtransmitter is present in the vehicle.The security light in the instrumentcluster comes on if there is aproblem with arming or disarmingthe theft-deterrent system.The system has one or more RKEtransmitters matched to animmobilizer control unit in yourvehicle. Only a correctly matchedRKE transmitter will start thevehicle. If the transmitter is everdamaged, you may not be able tostart your vehicle.When trying to start the vehicle, thesecurity light may come on brieflywhen the ignition is turned on.If the engine does not start and thesecurity light stays on, there is aproblem with the system. Turn theignition off and try again.If the vehicle will not change ignitionmodes (ACC/ACCESSORY, ON/RUN/START, OFF), and the RKEtransmitter appears to beundamaged, try another transmitter.Or, you may try placing thetransmitter in the transmitter pocketin the center console. See Key andLock Messages on page 5-40.If the ignition modes will not changewith the other transmitter, yourvehicle needs service. If the ignitiondoes change modes, the firsttransmitter may be faulty. See yourdealer who can service thetheft-deterrent system and have anew RKE transmitter programmed tothe vehicle.
