Sensor, Oil Level (7/35) [2019-2022]: Description

The sensor, oil level, consists of a wire made of an alloy consisting of iron, nickel and cobalt. This combination results in properties, such as, small expansion due to heat. The wire is encased in a housing and is held in tension by a spring. The oil level measurement is done by closing the sensor circuit a short period and measure the current. The oil around the sensor cools the sensor wire and this change the wire resistance. The higher the oil level, the greater the cooling. The measured current varies depending on the sensor resistance. The current provides a corresponding voltage on a resistor connected in series, located in the Engine Control Module (ECM). The Engine Control Module (ECM) provides the engine oil level, based on preprogrammed information about the relation between the corresponding voltage and the oil level.