Multifunctional comprehensive type electric control automobile fault diagnosis system

Abstract

The invention relates to a multifunctional comprehensive type electric control automobile fault diagnosis system. The multifunctional comprehensive type electric control automobile fault diagnosis system comprises a vehicle-mounted network, a vehicle communication interface (VCI) system and personal computer (PC) diagnosis software. The system comprises two working modes: an off-line mode and an on-line mode. Under the off-line mode, the VCI system is connected with the vehicle-mounted network; fault diagnosis of a plurality of protocols and different module types is realized by the VCI system; functions of reading a fault code, removing the fault code, reading a frozen frame, reading a data stream and reading module information are realized; a diagnosis result is displayed by a liquid crystal display screen; and a function of storing diagnosis data is achieved. Under the on-line mode, the VCI system is connected with the vehicle-mounted network; the PC diagnosis software is connectedwith the VCI system; and the fault diagnosis of the plurality of protocols is realized. Besides the functions provided by a diagnosis protocol, a diagnosis application module also provides functions of monitoring data of the vehicle-mounted network and generating a diagnosis result report.

Description

technical field [0001] The invention belongs to the technical field of automobile fault diagnosis, in particular to a multifunctional comprehensive electronically controlled automobile fault diagnosis system which can use the system to monitor and record the operating parameters of a vehicle with an OBD system, perform fault diagnosis and remote fault diagnosis. Background technique [0002] OBD (On Board Diagnosis: On Board Diagnosis), first introduced by General Motors Corporation of the United States in 1981, its purpose is to monitor the vehicle's emission control system during the use of the vehicle, and can effectively monitor the emission status of the vehicle in use. The OBD system conducts online monitoring of the subsystems and components related to the vehicle's emission control system to determine whether the vehicle's emissions exceed the OBD limit specified in the emission regulations due to partial or complete failure of each subsystem and component. If the em...

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Problems solved by technology

[0007] The purpose of this invention is to provide a multi-functional comprehensive fault diagnosis system for electronically controlled vehicles to meet the comprehensive and complex vehicle diagnosis requirements for the problems of simple functions, low performance, cumbersome operation, and inconvenient upgrades that exist in traditional handheld diagnostic instruments. , improve the efficiency of vehicle fault maintenance and establish a vehicle remote fault diagnosis platform

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