Diagnostic method and system for vehicle, and related device thereof

A terminal, comprising:

• at least one processor;
• and
• a memory communicatively connected to the at least one processor, wherein the memory stores an instruction executable by the at least one processor;
• and
• the at least one processor is configured to execute the instruction to:
• send a connection request message to a management server, the connection request message being used to request address information of a diagnostic server corresponding to a to-be-diagnosed vehicle;
• establish a communication connection with the corresponding diagnostic server according to address information fed back by the management server for the connection request message;
• receive an operation instruction of a user, and sending the operation instruction to the diagnostic server, so that the diagnostic server responds to the operation instruction;
• send an expert assistance request message to the management server when an expert assistance diagnosis mode is set in the terminal;
• request the management server to send a request assistance signal to a background device according to the expert assistance request message;
• and
• perform data interaction with the diagnostic server, wherein a user of the background device controls the diagnostic server to perform the data interaction with the terminal according to the request assistance signal.

A diagnostic server, comprising:

• at least one processor;
• and
• a memory communicatively connected to the at least one processor, wherein the memory stores an instruction executable by the at least one processor;
• and
• the at least one processor is configured to execute the instruction to:
• establish a communication connection with a terminal according to address information provided by a management server to the terminal in response to receiving a connection request message from the terminal;
• receive an operation instruction sent by the terminal, and respond to the operation instruction;
• and
• wherein a user of a background device controls the diagnostic sever to perform data interaction with the terminal based on a request assistance signal sent to the background device by the management server in response to receiving an expert assistance request message sent by the terminal operating in an expert assistance diagnosis mode.