Oil Temperature Sensor For ECM: Description and Operation

GF18.30-P-2010P Oil Temperature Sensor, Component Description
ENGINE 642 in MODEL 164.1 /8, 203.0 /2, 221.0 /1, 251.0 /1 up to Model Year 2008
ENGINE 642 in MODEL 209.3 /4, 211.0 /2 /6, 219.3
ENGINE 642 in MODEL 463 up to 31.5.12





Shown on engine 642.910

48 Small oil pan

B1 Oil temperature sensor

Location
The oil temperature sensor is located on the small oil pan at the middle front.

Task
The oil temperature sensor detects the current oil temperature and supplies a matching voltage signal to the CDI control unit (N3/9).

Design
The oil temperature sensor possesses an integral measuring resistor with a negative temperature coefficient (NTC).

Function
The NTC measuring resistor alters its electrical resistance in line with the oil temperature. Electrical resistance decreases as temperature increases.

Faults in the oil temperature sensor are detected by the CDI control unit and entered in the fault memory.