Keyless entry is one of those things that still seems impressively modern, but its use on automobiles goes back a good way. Back in 1980, American Motors partnered with French automaker Renault; one of the first innovations of the resulting alliance was remote central locking, which debuted first on 1982 Renault models and the next year on the AMC Renault Alliance subcompact car. The technology spread slowly through the 1980s, and by 1999 was a common option on cars.
Toyota, like most manufacturers, makes this security process a bit on the obtuse side to keep cars safe and secure. Start by using a flat-blade screwdriver with the tip wrapped in electrical tape to gently pry out the black, 3-by-5 inch panel behind the driver-side mirror control switch. When it pops out, you'll see the keyless entry receiver module. You'll see a hole in the case. Keep a pencil handy.
Turn the ignition key to the "on" position, and leave it there. Use the pencil to press and hold the programming button through the hole in the receiver module. Hold the button for three seconds and release. The "Status Monitor" LED light on the dashboard will illuminate. You may also hear a chime.
Within five seconds, press and release the top button on your fob. The "status monitor" LED will turn off, the security chirper will chirp once, and the lights will flash on and off. The security system will now recognize that fob. If you want to add another fob, repeat the programming procedure, and turn the ignition off.
