Engine Coolant Temperature Sensor 2
WARNING: This page is about a different car, the 2017 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
The engine coolant temperature sensor is used to detect the radiator - outlet water temperature. The sensor modifies a voltage signal from the ECM. The modified signal returns to the ECM as the radiator - outlet water temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.
<Reference data>
| Engine coolant temperature [°C (°F)] |
Voltage* (V) | Resistance (kΩ) |
|---|---|---|
| -10 (14) | 4.29 - 4.50 | 7.0 - 11.4 |
| 20 (68) | 3.48 - 3.58 | 2.37 - 2.63 |
| 50 (122) | 2.03 - 2.49 | 0.68 - 1.00 |
| 90 (194) | 0.97 - 1.04 | 0.236 - 0.260 |
* : These data are reference values and are measured between ECM terminals.