Vehicle fault diagnosis and remote alarm system

The utility model discloses a vehicle fault diagnosis and remote alarm system which comprises a vehicle-mounted fault diagnosis alarm device and a remote server, wherein the vehicle-mounted fault diagnosis alarm device comprises a processor module, a CAN bus communication module, a voltage comparison module, a wireless communication module and a display module; the processor module can acquire a fault signal which is outputted by a vehicle device in the form of switching value by the voltage comparison module, receive a device fault signal on a CAN bus by the CAN bus communication module, and control the wireless communication of the wireless communication module and the server; and the display module is controlled by the processor module and can display fault information. The vehicle fault diagnosis and remote alarm system uses the vehicle-mounted fault diagnosis alarm device to acquire various device fault information on a vehicle, carry out real-time diagnosis, carry out display when a fault occurs, simultaneously transmit the fault information to the remote server for storage in a wireless communication way, alarm to the server end and notify management staff at the server end of carrying out timely treatment.