Circuit Description
WARNING: This page is about a different car, the 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
This is the VSC(TRAC) control main switch. When the VSC OFF (TRAC OFF) switch is pushed on, VSC(TRAC) control goes off and the VSC OFF (TRAC OFF) indicator lights up. Turn the ignition switch OFF, VSC(TRAC) control surely comes on when the ignition switch turns ON next time.
Pressing the VSC OFF switch in 2WD setting does not deactivate VSC control.