DTC P0115: Engine Coolant Temperature Circuit Malfunction (FROM 12/2010); DTC P0117: Engine Coolant Temperature Circuit Low Input (FROM 12/2010); DTC P0118: Engine Coolant Temperature Circuit High Input (FROM 12/2010): Wiring Diagram
WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.