1999 Lexus LX 470 Owners Manual - Page 35

The engine immobiliser system is a theft prevention system. When you insert the key in the ignition switch, the transponder chip in the key's head transmits an electronic code to the vehicle. The engine will start, only when the electronic code in the chip corresponds to the registered ID code for the vehicle. The system is automatically set when the key is removed from the ignition switch. At this time, the security indicator light at the center cluster flashes. When you insert the key in the ignition switch, the security indicator light goes out and the system is canceled automatically, which enables the engine to start. For your Lexus dealer to make you a new key with built-in transponder chip, your dealer will need your key number and master key. However, there is a limit to the number of additional keys your Lexus dealer can make for you. If you make your own duplicate key, you will not be able to cancel the system or start the engine. For vehicles sold in U.S.A. FCC ID: MOZ RI-7ATY MADE IN JAPAN This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. CAUTION Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.