How do you reset the security alarm for a 1998 Toyota Avalon?

To reset the security alarm on a 1998 Toyota Avalon, use the key to unlock the driver's door. Once inside, insert the key into the ignition and turn it to the "ON" position without starting the engine. Then, turn the key back to the "OFF" position and repeat this process two more times, ending in the "ON" position. This should deactivate the alarm system.