Engine Coolant Temperature (ECT) Sensor
- Backprobing ECT sensor, turn ignition on. See COMPONENT LOCATIONS . Measure voltage between sensor terminals. See ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE table. Replace sensor if voltage is not as specified.
- Turn ignition off. Disconnect ECT sensor connector. Measure resistance between sensor terminals. See ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE table. Replace sensor if resistance is not as specified.
ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE
| Temperature - °F (°C) | Volts | Ohms |
|---|---|---|
| -22 (-30) | 4.8 | 20,000-30,000 |
| -14 (-10) | 4.5 | 7000-11,400 |
| 68 (20) | 3.6 | 2100-2900 |
| 104 (40) | 2.7 | 1000-1300 |
| 140 (60) | 1.9 | 565-670 |
| 176 (80) | 1.2 | 295-365 |
| 194 (90) | 1.0 | 240-260 |
| 230 (110) | 0.65 | 140-160 |