Coolant temperature gauge sending unit — check and replacement
The coolant temperature indicator system consists of a warning light or a temperature gauge on the dash and a coolant temperature sending unit mounted on the engine. On the models covered by this manual, the Engine Coolant Temperature (ECT) sensor is an information sensor for the Powertrain Control Module (PCM) and also functions as the coolant temperature send- Ing unit for the temperature gauge. Information on the ECT sensor can be found in Emissions and engine control systems.