Fault detecting and diagnosing method for electric driving system of vehicle

The invention discloses a fault detecting and diagnosing method for an electric driving system of a vehicle, which comprises the following steps: 1) performing the low-pass filtering treatment on the data acquired by a sensor, and 2) setting a counting limiting value for each fault counter, comparing the data after being filtered with a diagnosis value, and confirming if the fault really occurs. By using the method provided by the invention, the real value of fault detection data and the fault diagnosis are scientifically processed, the data fluctuation caused by the system interference is reduced, the data authenticity is ensured, the frequency of fault alarming and recovering is reasonably reduced, the misinformation and omission are avoided, the system runs reliably and stably, and the safety and reliability of the electric automobile can be increased.