The oil pressure switch sends a signal to the DDE control unit, which then checks whether the oil pressure warning light on the instrument cluster must be activated. In order to prevent inappropriate activation of the oil pressure warning light, the oil pressure switch signal is suppressed in the following situations:
If the oil-pressure switch signals inadequate oil pressure in any other situation, the DDE control unit activates the oil pressure warning light.
Here, the DDE control unit monitors neither the signal of the oil-pressure switch nor the activation of the oil pressure warning lamp for faults.