Construcción de un prototipo de escáner automotriz para protocolos OBDII para la Escuela de Ingeniería Automotriz de la ESPOCH.

Abstract

Design and assembly of an automotive scanning OBD II (On Board Diagnostics) protocol for the Automotive Engineering School at ESPOCH (Escuela Superior Politécnica de Chimborazo). This paper involves the design and assembly of an automotive scanning OBD II (On Board Diagnostics) protocol for the Automotive Engineering School at ESPOCH (Escuela Superior Politécnica de Chimborazo) with the aim of providing students in this school with the appropriate equipment to learn and efficiently practice how to make a correct diagnosis of the vehicle function. The operation of several modern systems that is responsible of the engine movement as well as different electronic component such as sensors that control the different engine systems so that they work efficiently reducing at the minimum polluting emissions were studied in detail. As the result of the study, it was possible to design an electronic equipment that when connected to the car computer ECM (Electronic Control Module), a direct communication in the data transmission which is indispensable for the sensors and actuators with real time as in the trouble codes saved and the possibility to manually delete them when the user want. All the data sent by the ECM (Electronic Control Module) are visualized in the computer by means of software especially designed for this type of communication code. This equipment is an important support that helps students an future professionals to obtain a basic knowledge and handle computerized diagnosis equipment. The paper also provides a practice handbook that enhances the theorical understanding of this type of system.