Online diagnosis method for automobile instrument

• Main Authors: ZHAO JIANGBO, YAN WENKE, WANG WEIKE, CUI CHAOCHAO
• Format: Patent
• Language: Chinese; English
• Published: 15.12.2023
• Subjects: ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDEDFOR ELSEWHERE; CHECKING-DEVICES; CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; GENERATING RANDOM NUMBERS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGISTERING OR INDICATING THE WORKING OF MACHINES; REGULATING; TIME OR ATTENDANCE REGISTERS; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION; VOTING OR LOTTERY APPARATUS

The invention discloses an on-line diagnosis method for an automobile instrument. The method comprises the following steps: defining query and control commands; the diagnostic instrument is connected to a vehicle-mounted OBD interface through a CAN transceiver, the interior of the OBD interface is connected to a bottom plate CAN of the full-liquid-crystal instrument through the CAN, and a bottom plate and a graphic plate in the instrument are communicated through a serial port; a query and control command of the diagnostic instrument is transmitted to the serial port process of the graphic board through the CAN of the bottom board, then the serial port process is transmitted to each process of the graphic board through the socket transceiving thread, after each process receives the query or control command, parameters are checked, the query or control command is executed, and a result is returned to the serial port process of the graphic board through the socket transceiving thread. And the graphic board seri