Patent ID: 9251632
Filing Date: 2016-02-02
CPC Classification: G07C

Claim Text:
1. A vehicle diagnostic system comprising: a communication bus mounted on a vehicle; a plurality of controllers for controlling vehicle operations, the controllers being connected with each other through the communication bus; and a diagnostic equipment to collect diagnostic information from the controllers through the communication bus and to diagnose the vehicle operations; wherein each controller operates both in a normal mode and in a sleep mode, the normal mode being an operation mode in which all of functions are operational, and the sleep mode being an operation mode in which all of or a part of the functions excluding at least a function for receiving an wake-up instruction to return to the normal mode through the communication bus are suspended, wherein at least two of the controllers are configured to send the wake-up instruction to the other controllers in response to receiving a predetermined signal from the diagnostic equipment, wherein the diagnostic equipment determines whether each of the controllers is in a state capable of communication, and wherein the diagnostic equipment selects one controller determined to be in a state capable of communication from the at least two of the controllers and sends the predetermined signal to the selected one controller.