Engine control apparatus with mode changeover function

An engine control apparatus with a mode changeover function, including a plurality of input terminals connected to a plurality of input units, respectively, and a plurality of output terminals connected to a plurality of display devices corresponding to said plurality of input units, respectively, wherein said engine control apparatus is designed to fetch input information from said plurality of input units to thereby drive said plurality of display devices and imparted with a mode changeover function for changing over control modes in response to external input information,

• said engine control apparatus comprising:
• a removable short-circuit line for forming a short-circuit selectively between a predetermined one of said plural output terminals and a predetermined one of said plural input terminals;
• and
• mode changeover decision means for deciding that the control mode changeover state is validated when the short-circuit is formed between said predetermined output terminal and said predetermined input terminal by means of said short-circuit line.