DTC C0278/11: Abs & VSC Relay Circuit: Wiring Diagram
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.
For a wiring diagram of ABS & VSC relay circuit, see Fig 1.
For complete ABS System Wiring Diagrams, see ANTI-LOCK BRAKES in SYSTEM WIRING DIAGRAMS article.