C 320 Wagon (203.264) V6-3.2L (112.946) (2004)
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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%.
Because oil level and oil quality (capacitance of the engine oil) are dependent of each other, this information is first compensated for in the engine
control unit, before it is transmitted via CAN databus to instrument cluster.
The following faults at the oil sensor are detected by the engine control unit and entered in the fault memory:
-
Duty cycle of a signal less than 17% or more than 83%
-
Dielectric constant of engine oil longer than 100 seconds greater than 5.8 (e.g. because of a lot of water in the engine oil).
