Engine Coolant Temperature (ECT) Sensor
Remove engine coolant temperature sensor. Place sensor and thermometer in container of coolant. Connect ohmmeter to sensor terminals. Slowly heat coolant. Note resistance at specified temperatures. See appropriate ECT SENSOR RESISTANCE table. Replace sensor as necessary.
ECT SENSOR RESISTANCE
| Temperature | Ohms |
|---|---|
| -4°F (-20°C) | 14,600-17,800 |
| 68°F (20°C) | 2200-2700 |
| 104°F (40°C) | 1000-1300 |
| 140°F (60°C) | 500-650 |
| 176°F (80°C) | 290-350 |