This keyless remote programming instructions work for GREY REMOTE remote with part # PT398-07101, 08191-00871, FCC id BAB237131-056, BAB237131-022 on the back of it.
1. Turn the ignition ON using your key but don't start the engine.
2. Look for the Valet button/switch then press and hold it for 3 seconds. (see figure). Use a pencil or any object to poke through the Programming Button access hole.
4. Within 5 seconds of lighting the status MONITOR LED, press and release the transmitter’s TOP or BOTTOM button (either button on your REMOTE CONTROL can be programmed to operate the system - the other button can be programmed to operate a second Toyota vehicle with the same system).