i have a 2002 sc 430, skid control ecu went bad, dealership wants to much to repair. I found online parts, I have the knowledge in removal and replacement, but reprogramming it, can I do that myself? what type of scanner tool would I need?

 

A compatible laptop with Techstream software, OBDII cable and a professional subscription to TIS for 2-days. See this: https://techinfo.snapon.com/TIS/Register.aspx

more specifically ECU calibrations and reprogramming.
”A Professional Diagnostic TIS subscription provides the same access to the technical information library provided with the Standard subscription. A Professional Diagnostic subscription also allows download of Techstream software and all current ECU calibration files. Package a Professional Diagnostic subscription with a Techstream or Mongoose to fully enable scantool diagnostics and vehicle reprogramming capability. For more information on scantools and vehicle reprogramming, click here.”

 

You may be better off getting your ECU repaired https://www.ebay.com/itm/REPAIR-SERV...MAAOSwTMZbiDrW

I believe that one of ClubLexus's vendors, TANIN Auto may be able to repair it. They do very good work.