2005 Buick Century Owner's Manual - Page 82

Theft-Deterrent Systems Vehicle theft is big business, especially in some cities. Although your vehicle has a number of theft-deterrent features, we know that nothing we put on it can make it impossible to steal. However, there are ways you can help. PASS-Key® II The vehicle is equipped with the PASS-Key® II (Personalized Automotive Security System) theft-deterrent system. PASS-Key® II is a passive theft-deterrent system. It works when the ignition key is inserted or removed from the ignition. When the PASS-Key® II system senses that the wrong key has been inserted into the ignition, it shuts down the vehicle's starter and fuel systems. The starter will not work and fuel will not go to the engine for about three minutes. If someone tries to start the vehicle again with the wrong key, or uses another incorrect key during this time, the vehicle will not start. This discourages someone from randomly trying keys with different resistor pellets in an attempt to make a match. The ignition key must be clean and dry before it is inserted in the ignition or the engine may not start. If the engine does not start and the SECURITY warning light on the instrument panel is flashing, the key may be dirty or wet. Turn the ignition off. Clean and dry the key. Wait about three minutes and try again. If the vehicle still does not start, the ignition key may be faulty. Wait about three more minutes and try a spare ignition key. At this time, you may also want to check the fuse. See Fuses and Circuit Breakers on page 5-91 for information on fuse location. If the starter will not work with the spare key, the vehicle needs service. See your dealer or a locksmith who can service the PASS-Key® II. PASS-Key® II uses a resistor pellet in the ignition key that matches a decoder in the vehicle. 2-16