Engine Coolant Temperature Receiver Gauge Malfunction: Description
WARNING: This page is about a different car, the 2013 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.
In this circuit, the meter ECU receives engine coolant temperature signals from the ECM using the CAN communication system. The meter ECU displays engine coolant temperature that is calculated based on the data received from the ECM.