Engine Coolant Temperature (ECT) Sensor
- Remove ECT sensor. ECT sensor is threaded into top of lower intake manifold on 1.3L, and on underside of intake manifold on 1.6L. Place ECT sensor and thermometer into container of coolant.
- Connect ohmmeter to coolant temperature sensor terminals. Cool or heat container. Note resistance at specified temperatures. See ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE . Replace ECT sensor if resistance is not within specification.
ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE
| Temperature °F (°C) | Ohms |
|---|---|
| -4 (-20) | 14,600-17,800 |
| 68 (20) | 2200-2700 |
| 104 (40) | 1000-1300 |
| 140 (60) | 500-650 |
| 176 (80) | 290-350 |