Patent ID: 7079982

Claim:
A working machine failure diagnosis method for performing a failure diagnosis by transmitting and receiving signals through communication devices provided at a working machine and at an information management center comprising: a failure diagnosis signal transmission step in which a failure diagnosis signal is transmitted from the working machine to the information management center via the communication devices as a signal for a failure diagnosis is input by an input operation at the working machine when a problem has occurred at the working machine; a problem condition inquiry signal transmission step in which, after the failure diagnosis signal is transmitted, a problem condition inquiry signal for inquiring a problem condition of the working machine is transmitted to the working machine from the information management center via the communication devices; a problem condition signal transmission step in which, when a condition of the problem having occurred at the working machine is selected at the working machine as an answer to a problem condition inquiry in response to the problem condition inquiry signal, a problem condition signal representing the problem condition is transmitted to the information management center from the working machine via the communication devices; an operation guide step in which an operation guide signal for prompting to perform an operation corresponding to the problem condition is generated at the information management center based upon the problem condition signal after the problem condition signal is transmitted, and the operation guide signal is then transmitted to the working machine from the information management center via the communication devices; an information transmission step in which a state signal representing a state of the working machine when the working machine is operated in response to the operation guide signal is transmitted to the information management center from the working machine via the communication devices; a failure identifying signal transmission step in which, after the state signal is transmitted, the information management center generates a failure identifying signal for identifying a location of a failure based upon the state signal and the failure identifying signal is then transmitted from the information management center to the working machine via the communication devices; and an informing step in which failure information based on the failure identifying signal is provided to an operator.