I doubt it's factory.
See this thread for how to find a valet switch and operate it: http://www.toyotanation.com/forum/1...8562-what-does-light-mean-can-t-turn-off.html
You should also look up under the driver side dash to see if you can locate the alarm unit (and the telltale sign of a lot of wires spliced in across the board). See if you can find the model number, and then look online for instructions.
See this thread for how to find a valet switch and operate it: http://www.toyotanation.com/forum/1...8562-what-does-light-mean-can-t-turn-off.html
You should also look up under the driver side dash to see if you can locate the alarm unit (and the telltale sign of a lot of wires spliced in across the board). See if you can find the model number, and then look online for instructions.