The sensor consists of a high resistivity wire. When a current passes through a wire, its resistance is different depending on whether it is in a liquid or in air.
After a certain time, a certain voltage is established on the sensor terminals, which depends on how immersed the wire is. This voltage is analyzed by a special electronic unit that controls the level indication and signal output «minimum oil level» on the central liquid crystal display.
When the ignition is switched on, the central display shows the oil level as «sectors» for about 30 seconds, then proceeds to display the total and daily odometer readings (i.e. to the odometer function).
Note. If you start to turn the trip counter reset knob before the shutter speed ends, the odometer function will turn on.
Diagnostics
If a short circuit or open circuit is detected while measuring the oil level, the display will immediately switch to displaying the odometer and hour meters.
The sensor resistance should be between 6 and 20 ohms.
If the resistance is less than 4 ohms, then it is considered that there is a short circuit in the sensor. If the resistance is greater than 22 ohms, then it is considered that there is an open circuit in the sensor.