2003 Lincoln Navigator Owner Guide 1st Printing (Spanish) - Page 561

Locks and Security If an unprogrammed key is used in the ignition it will cause a "no start" condition. Programming spare keys A maximum of eight keys can be coded to your vehicle. Only SecuriLock௢ keys can be used. To program a coded key yourself, you will need two previously programmed coded keys (keys that already operate your vehicle's engine) and the new unprogrammed key(s) readily accessible for timely implementation of each step in the procedure. If two previously programmed coded keys are not available, you must bring your vehicle to your dealership to have the spare coded key(s) programmed. Please read and understand the entire procedure before you begin. 1. Insert the first previously 3 programmed coded key into the ignition and turn the ignition from 1 2 (OFF) to 3 (ON) (maintain ignition in 3 (ON) for at least one second, 4 but no more than ten seconds). 2. Turn ignition from 3 (ON) back to 1 (OFF) in order to remove the first 1 coded key from the ignition. 3. Within ten seconds of removing the first coded key, insert the second previously programmed coded key into the ignition and turn the ignition from 1 (OFF) to 3 (ON) (maintain ignition in 3 (ON) for at least one second but no more than ten seconds). 4. Turn the ignition from 3 (ON) back to 1 (OFF) in order to remove the second coded key from the ignition. 5. Within 10 seconds of removing the second coded key, insert the new unprogrammed key (new key/valet key) into the ignition and turn the ignition from 1 (OFF) to 3 (ON) (maintain ignition in 3 (ON) for at least one second, but no more than ten seconds). This step will program your new key to a coded key. 6. To program additional new unprogrammed key(s), repeat this procedure from step 1. If successful, the new coded key(s) will start the vehicle's engine and the theft indicator will illuminate for three seconds and then go out. If not successful, the new coded key(s) will not start the vehicle's engine and the theft indicator will flash on and off and you may repeat steps 1 through 5. If failure repeats, bring your vehicle to your dealership to have the new spare key(s) programmed. 170