Engine Coolant Temperature Gauge
WARNING: This page is about a different car, the 2003 Mercury Sable and 2003 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
The engine coolant temperature gauge indicates the engine coolant temperature based on the operating resistance range from the engine coolant temperature sender. If the engine coolant temperature is low, the sender resistance is high. If the engine coolant temperature is high, the sender resistance is low. The engine coolant temperature sender resistance range should be between 18.3 ohms and 275 ohms.