My 2004 4Runner had this condition. I purchased a device from Walmart which hooks to the Diagnostic Connnector of the Car. As it turns out the "Trac Off" and "Vsc Track" lights WILL come on when the Check Engine Light comes on. My Device showed a Repair Code of "P0306". "Misfire in Cylinder 6". Each time they Thought the problem was solved they turned the Check Engine (and other lights off). The "Trac off & VSC Lights apparently tell you "those systems are disconnected" until you solve the Check Engine Lignt Problem. After 7 trips back for a fix (4 to Meinke and 3 to Toyota), I still have the 3 lights come on.