Oil Temperature Sensor For ECM: Description and Operation

GF18.30-P-2010AMG Oil Temperature Sensor, Component Description
ENGINE 156.980 in MODEL 164, 251 up to Model Year 8
ENGINE 156.982 in MODEL 209
ENGINE 156.983 in MODEL 211, 219
ENGINE 156.984 in MODEL 216, 221 up to Model Year 8





Location

B1 Oil temperature sensor

The oil temperature sensor is located at the front at the left side of the crankcase.

Function
The NTC resistor integrated in the oil temperature sensor alters its electrical resistance according to the oil temperature. The ME-SFI control unit (N3/10) evaluates the corresponding voltage signal for their oil temperature.

Oil temperature
20 °C
60 °C
120°C

Resistance value
3123 ohms
632 ohms
101 ohms

Voltage signal
0,312 V
0,063 V
0,010 V

NTC means "Negative Temperature Coefficient", C which means:
The electrical resistance falls as the temperature rises (heat conductor).