Vehicle electronic control device and method thereof

A vehicle electronic control device mounted on a vehicle and executing a predetermined function of the vehicle, the vehicle electronic control device comprising:

• a main processor executing a main process according to a main program based on input data from at least one sensor;
• a sub processor executing a sub process according to a sub program based on input data same as the input data of the main processor;
• and
• an abnormality determination unit comparing (i) a calculation result of the main process calculated by the main processor with (ii) a calculation result of the sub process calculated by the sub processor and determining an abnormality in the main processor based on a comparison result of the calculation results,
• wherein
• the predetermined function is performed by the main process, which is executed by the main processor according to the main program,
• the sub program is capable of executing the predetermined function equivalent to the predetermined function of the main program,
• the sub program provides an improved performance than the main program by having a configuration that differs in part or in whole from a configuration of the main program,
• the sub processor has a verified program for executing a substitute process to the main process, and
• the sub processor switches an execution target program from the sub program to the verified program and executes the substitute process in response to the abnormality determination unit determining the abnormality in the main processor.