Engine Coolant Temperature (ECT) Sender
- Turn ignition off. Disconnect ECT sender 1-pin connector. Drain cooling system and remove ECT sender. Place probe end of ECT sender and thermometer in a container of water. Connect an ohmmeter between ECT sender terminal and ECT sender body.
- Heat water and note resistance reading. See ENGINE COOLANT TEMPERATURE GAUGE SENDER RESISTANCE table. If resistance is not as specified, replace ECT sender.
ENGINE COOLANT TEMPERATURE GAUGE SENDER RESISTANCE
| Application & Water Temp. °F (°C) | Ohms | |
|---|---|---|
| Avalon | ||
| 122 (50) | 234-314 | |
| 248 (120) | 24-31 | |
| Camry | ||
| 122 (50) | 274 | |
| 248 (120 | 26 | |
| Camry Solara, Celica & Corolla | ||
| 122 (50) | 160-240 | |
| 248 (120) | 17-21 | |