Vehicle Fault Diagnostic System Design And Development

Recently more and more computer and electric technology be used in automobile design, automobile will have more and more function and more electric control unit. But the automobile problem will be more and more difficultly to fix it. Diagnostic system and software will be popular and have more functions.This article analyse the automobile problem and diagnostic system's status, especially study the electric control unit fault's condition , and also study the vehicle DTC diagnostic process. Then develop this"vehicle diagnostic system". The main content include diagnostic architecture design, DTC design and data display design.This system include two function, one is diagnostic function ,one is software service reprogramming function. Thru this system technician can read diagnostic trouble code, read electric control unit data flow ,do ECU set up and configuration, read electric control unit hardware and software information and version, do electric control unit internal software reprogramming, and also develop a seed and key software algorithm to prevent inlegal change the software. Technician using this system can quickly to find the problems and quickly to solve the problems.This project has practicality and economy value , this project got the 2008 PATAC Science & Technology Innovation Award 3rd Prize.