Bit-serial data interface (BSD): Diagnosis
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The DME/DDE monitors the communication across the bit-serial data interface to the connected components. This means that line faults are also detected.
The connected components have their own diagnosis functionality and monitor the following:
- The executed functions are monitored for faults (e.g. faulty preheating circuit for the preheating control unit)
- Internal faults in the components
If a component detects a fault, it reports the fault across the bit-serial data interface to the DME/DDE. The DME/DDE then enters the fault in the fault memory.