Thanks for responses. The 2000 doesn't have TBW- that came with the model change in '02.
I presume that checking code for radio before disconnecting battery is advisable because of the security chip?
BTW, interesting that first response on LexusUS BB was from Mississauga, ON since I'm in TO(that's toronto for our Southern friends). Also, my son-in-law works in Plano.
Looks like you've developed a chummy group here.