Engine Coolant Temperature (ECT) Sensor
- A malfunction in the engine coolant temperature sensor circuit will set a related diagnostic trouble code. For testing procedures, see TESTS W/CODES article in this section. An out-of-calibration ECT sensor may not set a diagnostic trouble code. Use following procedure to test sensor calibration.
- Remove engine coolant temperature sensor. Refer to the ENGINE COOLANT TEMPERATURE (ECT) SENSOR LOCATION . Using ohmmeter, measure resistance of engine coolant temperature sensor at designated temperatures. Replace ECT sensor if resistance is not within specification. See ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE .
ENGINE COOLANT TEMPERATURE (ECT) SENSOR LOCATION
| Application | Location |
|---|---|
| Prizm & Prizm LSi | On Left Side Of Engine, In Coolant Housing |
ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE
| Temperature: °F (°C) | Ohms |
|---|---|
| -4 (-20) | 10,000-20,000 |
| 32 (0) | 4000-7000 |
| 68 (20) | 2000-3000 |
| 104 (40) | 900-1300 |
| 140 (60) | 400-700 |
| 176 (80) | 200-400 |