Control method and apparatus applied to controller

A control method, wherein the control method is applied to a controller in an engine, the controller comprises a main control circuit board, a fault detection circuit board, a field-effect transistor metal-oxide-semiconductor (MOS) array, and a conduction control circuit board for controlling a MOS in the field-effect transistor MOS array to be turned on, wherein the control method comprises:

• receiving, by the main control circuit board via a controller area network (CAN) bus, an initial control command from an electronic control unit (ECU) in the engine after the ECU is powered on;
• controlling, by the main control circuit board based on the initial control command, the fault detection circuit board to detect initial states of the controller and all devices connected to the controller to obtain initial state information, and transmitting, by the main control circuit board via the CAN bus, the initial state information to the ECU;
• receiving, by the main control circuit board via the CAN bus, a first target control command from the ECU, wherein the first target control command is transmitted by the ECU after determining that the initial state information indicates that each of the initial states of the controller and all the devices connected to the controller is a preset state;
• and
• controlling, by the main control circuit board based on the first target control command, the conduction control circuit board to turn on at least one MOS in the MOS array to output a control signal to a heater connected to the controller to control the heater to operate.