Engine Coolant Temperature Sensor
The engine coolant temperature sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the ECM. The modified signal returns to the ECM as the engine coolant 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.
|
Engine coolant temperature [°C (°F)] |
Voltage * (V) |
Resistance (kΩ) |
|
-10 (14) |
4.4 |
7.0 - 11.4 |
|
20 (68) |
3.5 |
2.37 - 2.63 |
|
50 (122) |
2.2 |
0.68 - 1.00 |
|
90 (194) |
0.9 |
0.236 - 0.260 |
*: These data are reference values and are measured between ECM terminals.