Engine Coolant Temperature (ECT) Sensor
WARNING: This page is about a different car, the 1995 Ford Aerostar. However, it is still accessible from the selected car via links, so may be relevant.
Sensor requires a 5-volt reference signal during engine operation. With sensor disconnected, sensor may be checked by measuring resistance between sensor terminals. For specifications, see SENSOR RANGE CHARTS article. For additional testing information and circuit testing of sensor, see CIRCUIT TEST DA in TESTS W/CODES - EEC-IV (3.0L) article.