Vehicle control system and vehicle control method

A method executed by one or more processors included in a vehicle in which a plurality of in-vehicle devices are mounted, the method comprising:

• performing a first determination determining whether software versions of the respective in-vehicle devices are compatible or incompatible with each other;
• performing a second determination determining whether a part of the software versions of the respective in-vehicle devices are compatible or incompatible with each other;
• selectively performing three kinds of control based on a result of the first determination and a result of the second determination, the three kinds of the control including an execution of a first function, an execution of a second function different from the first function, and an execution of neither the first function nor the second function,
• executing the first function when it is determined that the software versions of the respective in-vehicle devices are compatible with each other in the first determination;
• executing the second function when it is determined that:
• (i) the software versions of the respective in-vehicle devices are incompatible with each other, and
• (ii) the part of the software versions of the respective in-vehicle devices are compatible with each other;
• and
• executing neither the first function nor the second function when it is determined that:
• (iii) the software versions of the respective in-vehicle devices are incompatible with each other, and
• (iv) the part of the software versions of the respective in-vehicle devices are incompatible with each other.

A non-transitory storage medium storing instructions that are executable by one or more processors and that cause the one or more processors to perform functions comprising:

• performing a first determination determining whether software versions of respective in-vehicle devices are compatible or incompatible with each other;
• performing a second determination determining whether a part of the software versions of the respective in-vehicle devices are compatible or incompatible with each other;
• selectively performing three kinds of control based on a result of the first determination and a result of the second determination, the three kinds of the control including an execution of a first function, an execution of a second function different from the first function, and an execution of neither the first function nor the second function,
• executing the first function when the software versions of the respective in-vehicle devices are determined to be compatible with each other in the first determination;
• executing the second function when it is determined that:
• (i) the software versions of the respective in-vehicle devices are incompatible with each other, and
• (ii) the part of the software versions of the respective in-vehicle devices are compatible with each other;
• executing neither the first function nor the second function when it is determined that:
• (iii) the software versions of the respective in-vehicle devices are incompatible with each other, and
• (iv) the part of the software versions of the respective in-vehicle devices are incompatible with each other.