VEHICLE CONTROL SYSTEM

A plurality of signal lines (600) connects a first controller (300) and a second controller (400) to each other. The first controller (300) supplies a plurality of first control signals for controlling an actuator (100) for controlling the second controller (400) through a plurality of signal lines (600) and performs an abnormality diagnosis of each of the plurality of first control signals. The second controller (400) outputs a second control signal for controlling the actuator (100) based on a plurality of first control signals supplied from the first controller (300) through the signal lines (600) and diagnosis results of the plurality of first control signals obtained by the first controller (300).