Vehicle control system, information processing device, and master electronic control unit

An information processing device configured to be communicably connected to a master electronic control unit and multiple slave electronic control units via an in-vehicle network, wherein

• the information processing device is configured to perform
• receiving accuracy-related information from the master electronic control unit and the multiple slave electronic control units, the accuracy-related information being information related to accuracy of time synchronization between the master electronic control unit and the slave electronic control units;
• and
• transmitting list information based on the accuracy-related information acquired from the master electronic control unit and the multiple slave electronic control units to the master electronic control unit and the multiple slave electronic control units.

A master electronic control unit configured to be communicably connected to multiple slave electronic control units via an in-vehicle network, wherein

• the master electronic control unit is configured to perform
• receiving accuracy-related information from the multiple slave electronic control units, the accuracy-related information being information related to accuracy of time synchronization between the master electronic control unit and the slave electronic control units;
• and
• transmitting list information based on the accuracy-related information acquired from the multiple slave electronic control units to the multiple slave electronic control units.