Vehicle bus fault detection device

The utility model provides a vehicle bus fault detection device, and belongs to the automobile electronic technology field. The vehicle bus fault detection device solves the problem of manual fault troubleshooting and maintenance of a vehicle bus in the prior art. The detection device comprises a bus of a vehicle and a plurality of control modules connected with the bus. The detection device also comprises a bus detection controller used for data communication with the plurality of control modules on the bus and then detecting whether the bus breaks down or not and an electronic control unit used for connecting with the bus detection controller and outputting a bus fault prompt signal. The electronic control unit is connected with a bus fault prompt device used for prompting a bus fault signal. The bus detection controller is connected with the bus. The bus detection controller is connected with the electronic control unit. The electronic control unit is connected with the bus fault prompt device. The vehicle bus fault detection device can determine bus faults automatically, reduces workload of bus detection personnel and raises the practicality.