The invention provides a fault detecting and
processing method and device for a braking assisting
system. The fault detecting and
processing method for the braking assisting
system includes the steps that the needed actual time for increasing a first value to a second value of the vacuum degree in a
vacuum pump in the current environment is obtained; the needed normal upper
limit time for increasing the first value to the second value of the vacuum degree in the
vacuum pump in the non-fault state of the braking assisting
system in the current environment is obtained, and the needed fault upper
limit time for increasing the first value to the second value of the vacuum degree in the
vacuum pump in the fault state of the braking assisting system in the current environment when the braking function can be finished is obtained as well; whether a fault exists in the braking assisting system of a vehicle or not is judged according to the actual time and the normal upper
limit time; if the fault exists, the corresponding fault level is obtained according to the actual time, the normal upper limit time and the fault upper limit time; and corresponding
processing operation is executed according to the fault level. By the adoption of the scheme, the fault of the braking assisting system of the vehicle can be diagnosed in time, and the personal safety of a driver and passengers can be guaranteed to the largest degree.