Engine Coolant Temperature Sensor
Remove engine coolant temperature sensor, located at heater core. Place sensor and thermometer in water. Measure resistance between sensor terminals as water is heated. See ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE SPECIFICATIONS table. If resistance is not as specified, replace engine coolant temperature sensor.
ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE SPECIFICATIONS
| Sensor Temperature - °F (°C) | Ohms |
|---|---|
| 32 (0) | Less Than 50,000 |
| 104 (40) | 2500-2700 |
| 212 (100) | Greater Than 200 |