Design And Implementation Of Vehicle Diagnostic System Based On AUTOSAR

With the development of automotive electronics, the traditional developing and testing methods for vehicle diagnosis can hardly meet the demand of real-time, accuracy and efficiency of development. AUTOSAR has provided new methods for solving the repeated application development and portable problems. However, some drawbacks still exist, such as the cumbersome configuration, low efficiency, too much resources occupation, incomplete developing tools and few AUTOSAR solution references.In this paper, we have investigated AUTOSAR solutions and vehicle diagnostic systems of the major vehicle manufacturers, software and hardware providers. Based on such investigations, we have accomplished the design and implementation of vehicle diagnostic system according to the AUTOSAR. Meanwhile, by using the hardware in the loop simulation technique, we have built the diagnosis simulation testing environment.In this paper, firstly, we have explored a new method of software development for vehicle diagnostic system based on AUTOSAR—current mainstream trends in automotive electronics.When develop such diagnostic system, software developers do not need to concern about the realization of the underlying hardware and communication details, focusing on the design of software functions is just enough. Then, based on the above method and OBD diagnostic protocols, we have accomplished the diagnostic event manger (DEM) and diagnostic communication manger (DCM) which are the core modules in AUTOSAR diagnostic system. The seven common OBD services are implemented in the system. Finally, we use the hardware in the loop simulation technology to build a diagnostic simulation test environment. The OBD diagnostic protocols require the diagnostic module of the engine electronic control unit to real-time monitoring the components and systems malfunctions, correctly record fault code and make the appropriate reactions according to the fault conditions. This paper uses HIL technology to achieve simulation tests, which can save considerable time and expense. Moreover, HIL can complete the test under extreme conditions which cannot be accomplished in real vehicle testing. All the tests are reproducible and automatic.