Apparatus for diagnosing a circuit arrangement
A technology for diagnosing circuits and current measuring devices, applied in the directions of measuring devices, measuring electricity, short-circuit testing, etc., can solve the problems of high diagnostic equipment, cost, inability to distinguish reference potential line diagnosis, etc.
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[0029] figure 1 A device according to the invention for diagnosing short circuits and / or wire breaks in a circuit arrangement is represented. In particular, the device is suitable for detecting short circuits to reference potential as well as to supply potential. In particular, the above-mentioned faults can be distinguished here.
[0030] The circuit arrangement to be diagnosed generally includes at least two load circuits connected in parallel. In the present exemplary embodiment, three load circuits 10 , 20 , 30 connected in parallel are shown by way of example. Each load circuit 10 , 20 , 30 is formed by a series connection of a load 11 , 21 , 31 and a controllable switching element 12 , 22 , 32 . The loads 11 , 21 , 31 can be, for example, ignition coils or fuel injection valves of a motor vehicle.
[0031] The load circuits 10 , 20 , 30 are connected between the first supply potential connection 1 and the reference potential connection 3 . The controllable switching...
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