Circuit Description
WARNING: This page is about a different car, the 2006 Toyota Corolla and 2005 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
The circuit is used to send TRAC & VSC control information (engine revolution signal) from the skid control ECU to the ECM (TRC+, TRC-), and engine control information from the ECM to the skid control ECU (ENG+, ENG-).