Abstract: The present disclosure discloses a vehicle diagnosis method including: sending a login request of a user to a server; returning vehicle type selection data after the server has verified an authenticity of the user successfully; displaying a vehicle type selection interface related to the vehicle type selection data and sending a corresponding vehicle type data to the server based on a vehicle type selected by the user on the vehicle type selection interface via the user equipment; sending corresponding vehicle type data to the server; returning a vehicle diagnosis interface related to the vehicle type data by the server; controlling relevant vehicle terminal to perform corresponding vehicle diagnosis operation by the server when the server receives a vehicle diagnosis instruction as input by the user on the vehicle diagnosis interface; afterwards, displaying vehicle diagnosis operation result fed back by the vehicle terminal through the user equipment.

Abstract: The present disclosure provides a vehicle data stream displaying method and system, and a vehicle diagnostic device. The method includes: numbering at least one vehicle data stream that is displayed out of order; sorting the vehicle data stream, and displaying the vehicle data stream according to a sorting order; selecting at least one target data stream from the vehicle data stream according to a target data stream selection instruction; paging displaying the at least one target data stream; obtaining number data of a target data stream displayed on each page, and establishing a correlation relationship between a display page number and the number data; and paging refreshing a target data stream displayed on a current page, according to the correlation relationship between the display page number and the number data if a refreshing instruction is received.

Abstract: The present disclosure is applicable to the technical field of vehicle diagnosis, and provides a vehicle diagnostic method, a vehicle diagnostic system, and a vehicle diagnostic device. The vehicle diagnostic method comprises: determining a standard range of vehicle fault diagnosis; reading a current data stream of a vehicle in real time when a vehicle diagnosis instruction is received, and determining whether values of the current data stream are within a standard range; and outputting prompt information indicative of normal vehicle operation if the values of the current data stream are within the standard range; or outputting corresponding vehicle fault alarm information if the values of the current data stream are beyond the standard range. This present disclosure can improve an accuracy of vehicle fault diagnosis.

Abstract: The present application is applicable to the technical field of vehicle diagnosis, and provides a method and a system for graphically displaying a data stream and a vehicle diagnostic device. The method comprises: receiving and storing diagnostic data; graphically displaying the diagnostic data within a display range according to the display range set by a user; and receiving a zoom-in instruction or a zoom-out instruction sent by the user, zooming in or zooming out the display range according to a preset condition, and graphically displaying the diagnostic data within a zoomed in or zoomed out display range. In this process, the user can randomly zoom in and zoom out a displayed graph, which helps the user to comparatively look over different diagnostic data received within a long period of time so as to rapidly discover a fault or find out a fault cause.

Abstract: The present disclosure provides an interface switching method, including: loading a display interface of a default style based on a preset parent theme type when an application starts; monitoring whether a data type processed by the application changes in real time operation of the application; obtaining a preset child theme type corresponding to a data type currently processed by the application based on the data type currently processed by the application if the data type changes, wherein a value of an attribute name of which a display style needs to be changed relative to the parent theme type is defined in the child theme type; and switching a display style of the display interface based on the value of the attribute name defined in the child theme type and of which the display style needs to be changed relative to the parent theme type.

Abstract: A method for verifying instructions of diagnostic equipment is used to solve a technical problem that a lower computer of the diagnostic equipment is prone to be cheated by an upper computer, this method comprises: obtaining first verification data sent from the upper computer of the diagnostic equipment, wherein the diagnostic equipment carries the first verification data when a software version of the diagnostic equipment is updated, the first verification data is encrypted and comprises a set of instructions sent from the upper computer to the lower computer in a corresponding software version; decrypting the first verification data to obtain the set of instructions; comparing instruction data received from the upper computer with the set of instructions, and judging whether the instruction data comply with the set of instructions; if the instruction data comply with the set of instructions, executing the instruction data; and if the instruction data doesn't comply with the set of instructions, refusing to

Abstract: A method for verifying upgrade of diagnosis connector of diagnostic equipment is used to solve a problem that an illegal person implements an illegal upgrade for the diagnosis connector of the diagnostic equipment by cloning.