I bought my TLC with no Master Key and was fretting over losing the only key I had.
I took up Mauser's Virginized ECU with Programed Keys Service on this thread:
forum.ih8mud.com
Mauser shipped the his Virginized ECU+ Programmed Blank Keys promptly since it was gonna be a swap for my old ECU.
I first had the Blank Keys cut to my Key by a locksmith. Local Toyota dealer refused to cut it since it wasn't OEM.
The ECU swap was a breeze, took me 10 minutes.
1) take off your Glove box (Retainers off and unscrew two brackets at the bottom)
2) Remove the Black Cover by unscrewing 3 screws that hold it down and unhook the things attached to it:
3) Take off the Top and Bottom Brackets holding the ECU:
4)Move said Brackets to the new ECU:
5) Move the Wires over to the new ECU:
6) Test the new keys by starting the Truck.
7) Remount new ECU back and reverse the process
8) Program Key Fobs.
Overall I am very very very happy to have 2 new master keys, fobs that work and all for muccccchhhh less than the stealership.
Thank you Mauser and Son!
I took up Mauser's Virginized ECU with Programed Keys Service on this thread:

Master keys/ ecu virginizing service
My 13 year old son asked about doing some work this summer to make a little money. We don't have many neighbors and live too far from civilization to do any yardwork type jobs. We decided that he would take over my hobby of virginizing ecus to accept master keys and make a little money. I will...

Mauser shipped the his Virginized ECU+ Programmed Blank Keys promptly since it was gonna be a swap for my old ECU.
I first had the Blank Keys cut to my Key by a locksmith. Local Toyota dealer refused to cut it since it wasn't OEM.
The ECU swap was a breeze, took me 10 minutes.
1) take off your Glove box (Retainers off and unscrew two brackets at the bottom)
2) Remove the Black Cover by unscrewing 3 screws that hold it down and unhook the things attached to it:

3) Take off the Top and Bottom Brackets holding the ECU:


4)Move said Brackets to the new ECU:


5) Move the Wires over to the new ECU:

6) Test the new keys by starting the Truck.
7) Remount new ECU back and reverse the process
8) Program Key Fobs.
Overall I am very very very happy to have 2 new master keys, fobs that work and all for muccccchhhh less than the stealership.
Thank you Mauser and Son!