Engine Coolant Temperature (ECT) Sensor
- Turn ignition off. Disconnect negative battery cable. Drain coolant. Remove ECT sensor. Sensor is located at flywheel end of front cylinder head.
- With sensing portion of ECT sensor submerged in water measure resistance between terminals. See Figure. Replace ECT sensor if resistance is not as specified. See ECT SENSOR RESISTANCE table.
ECT SENSOR RESISTANCE
| Application & Temperature °F (°C) |
Ohms |
| -4 (-20) |
10,000-20,000 |
| 32 (0) |
4000-7000 |
| 68 (20) |
2000-3000 |
| 104 (40) |
800-1200 |
| 140 (60) |
400-750 |
| 176 (80) |
200-400 |
| 212 (100) |
120-250 |