Oil temperature sensor, component description - GF18.30-P-2010P

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ENGINE 642 in MODEL 164.1 /8, 203.0 /2, 209.3 /4, 211.0 /2 /6, 219.3, 221.0 /1, 251.0 /1

ENGINE 642 in MODEL 463

Shown on engine 642.910

Fig 1: Identifying Oil Temperature Sensor Location - ENGINE 642

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

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.