Engine Coolant Temperature (ECT) Sensor

Sensor is located in intake manifold coolant passage at front of most engines. On all models, 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 in this section. For additional testing information and circuit testing of sensor, see CIRCUIT TEST DA in TESTS W/CODES - EEC-IV article in this section.