Can anyone tell me, on an SC400, what is the difference between ECT on the
switch by the gear selector and Traction Control on the switch next to the
Heated Seats switches? What is each one supposed to do? Also, on Models
built from 1998 on, I don't see any Traction Control switch in photo's even
when they have the Heated Seats. Where is the switch on these later models?

ECT varies the transmission shift points for either better power or better
gas milage. Traction control has to do with enabling/disabling the system
that prevents wheel spin when starting off on slick surfaces.

I don't have specific information on the SC400, but most Lexus models these
days have a switch to control whether the skid control system is enabled or
disabled, typically labeled VSC. I believe this also controls the traction
control system, or perhaps it is on all the time. In any event, that's the
reason for not having a separate traction control switch.

- Mark