Engine Coolant Temperature (ECT) Sender (Except Tercel)
- 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 the resistance reading. Refer to the ENGINE COOLANT TEMPERATURE GAUGE SENDER RESISTANCE table. If resistance is not as specified, replace ECT sender.
ENGINE COOLANT TEMPERATURE GAUGE SENDER RESISTANCE
| Application | Ohms | |
|---|---|---|
| Avalon | ||
| 122°F (50°C) | 234-314 | |
| 248°F (120°C) | 24-31 | |
| Camry | ||
| 122°F (50°C) | 274 | |
| 248°F (120°C) | 27 | |
| Celica, Corolla & Supra | ||
| 122°F (50°C) | 160-240 | |
| 248°F (120°C) | 17-21 | |