Análisis de redes multiplexadas y protocolos de comunicación implementados en los vehículos Toyota en diferentes líneas de fabricación mediante equipos de diagnóstico

Abstract

This research work arose due to the difficult access to studies and research on communication protocols and multiplexed systems with advantages of reduced wiring and electronics, due to the privacy of technical information by the companies. Therefore, the objective of this research was to analyze the multiplexed systems, communication protocols, topology, data transmission speed and internal resistances of the network implemented in Toyota vehicles in different manufacturing lines, where a non-probabilistic sampling was used, concluding in two Toyota Yaris and one Prius. For the development of the investigation a documentary analysis was used, using bibliographic resources, studies, concepts and scientific articles related to the communication networks of the vehicles, added to the analysis of the multiplexed system and verifications in each one of the vehicles as: resistance between the channels, tensions, obtained signals and speed of data transmission by means of the equipment of automotive diagnosis of high range: automotive oscilloscope, automotive scanner and automotive multimeter. All this information and registered data were compared with the parameters dictated by the manufacturer Toyota. Among the main results it was found that the topology of the network of the vehicles has a lot of similarity despite the year of manufacture and model of the vehicle, but the data transmission speed of each of the networks changed considerably in each of the vehicles, due to several factors exposed in this research, while the resistance between pins 6 and 14 corresponding to the Can High and Can Low networks respectively are the same as stated by the manufacturer. To conclude, it is recommended the use of the electrical diagram and manuals of the vehicles to obtain objective and real data with the appropriate diagnostic equipment.