How do you program keyless remote on a 1993 Lexus sc 400?

To program a keyless remote for a 1993 Lexus SC 400, first, sit in the driver's seat and close all doors. Insert the key into the ignition and turn it to the "On" position and then back to "Off" five times within 10 seconds, ending in the "On" position. Press the "Lock" button on the remote within 30 seconds to register it. If successful, you'll hear a confirmation beep. Repeat the process for any additional remotes.