Patent ID: 7369925

Claim:
A vehicle failure diagnosis apparatus, comprising: a storage device for storing failure patterns that are variation processes of learned values until failures of vehicle control systems in time series, the learned values being parameters used for compensation of control in the vehicle control systems to maintain the vehicle control system in an optimum control state; a communication part; a record receiving function for receiving records of learned values actually used in the past in the vehicle control systems of vehicles as diagnosis targets from vehicle terminals in the vehicles via the communication part; a failure time estimating function for estimating future failure time of the vehicle control systems by comparing the received records of the learned values and the failure patterns readout from the storage device, wherein time when the learned value of the received record reaches a predetermined threshold indicating a possibility of a failure of the vehicle control systems is estimated as the future failure time on the basis of a gradient of the learned value of the failure pattern; and an estimation result output function for supplying the estimated future failure time to the vehicle terminals.