GF07.61-P-3026AM Engine Oil Information, Function

GF07.61-P-3026AM Engine Oil Information, Function
ENGINE 113.990 in MODEL 211, 219
ENGINE 113.991 in MODEL 215, 220
ENGINE 113.992 in MODEL 230 up to Model Year 2008
ENGINE 113.993 in MODEL 463 up to 31.5.12
ENGINE 113.995 in MODEL 230 up to Model Year 2008





A1 Instrument cluster
B40 Oil sensor (oil level, temperature and quality)
N3/10 ME control unit

CAN Data bus (Controller Area Network)

a Models 211, 219, 230 (rear sump)
b Models 215, 220, 463 (front sump)





Oil sensor signal assignment

1 On/off ratio signals OK
A Oil temperature 20 to 80%
B Oil level 20 to 80%
C Oil quality 20 to 80%
2 On/off ratio signals greater than 80%
A Oil temperature greater than +160°C
B Oil level greater than 80 mm
C Oil quality good
3 On/off ratio signals less than 20%
A Oil temperature less than -40°C
B Oil level less than 0 mm
C Oil quality poor
T pulse duty factor 100%

The tasks of the oil sensor are:
^ Detecting oil temperature
^ Detecting oil quality for demand-based oil change interval display
^ Warning the driver that the oil level is too low by means of an indication in the instrument cluster

The oil level, oil temperature and oil quality are detected by means of an oil sensor installed in the oil pan.
The oil sensor, which functions according to the capacitive measuring principle, has integrated electronics, which process the three signals into one PWM signal (pulse-width modulate signal).
The PWM signal is transmitted to the ME control unit and then on via the CAN data bus to the instrument cluster.
Each information block consists of three successive square-wave signals, This is followed by a short pause.
A measured variable is assigned to each square-wave signal (A, B, C). The quantisizing in each case is based on the on/off ratio (T) of approx. 20 to 80%.
Power for the oil sensor of approx. 5 V (sensor voltage) is supplied by the ME control unit.
Faults at the oil sensor are detected by the ME control unit and entered in the fault memory.