Engine Coolant Temperature (ECT) Sensor
- Backprobing ECT sensor, turn ignition on. Measure voltage between sensor terminals. See ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE . 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 . 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 |