Control system

A control system comprising:

• a power supply controller configured to supply and shut off power from a battery to a load in accordance with a power supply/shutoff instruction;
• and
• an instruction output device configured to output the power supply/shutoff instruction to the power supply controller,
• wherein the power supply controller comprises:
• a current detector configured to detect a current flowing from the battery to the load, and
• the instruction output device comprises:
• a voltage detector configured to detect a voltage applied to the load;
• a determination controller to configured to determine whether or not the supply of power is abnormal, based on (i) whether the power supply/shutoff instruction that is output to the power supply controller to supply power or to shut off the supply of power, (ii) a value of the current detected by the current detector, and (iii) a value of the voltage detected by the voltage detector;
• and
• a specification controller configured to specify a reason of the abnormality, if it is determined by the determination controller that the supply of power is abnormal, based on (i) whether the power supply/shutoff instruction output to the power supply controller is to supply power or to shut off the supply of power, (ii) the value of the current detected by the current detector, and (iii) the value of the voltage detected by the voltage detector.