Starter key of construction equipment and maintenance system of construction equipment using the same

A maintenance system of construction equipment using a starter key of the construction equipment for use in the construction equipment provided with an electronic control unit (ECU) having a maintenance monitoring function and a connection interface for a wire/wireless data input/output between the ECU and an external storage device, the maintenance system comprising:

• the starter key of the construction equipment having a wire/wireless data communication means, and capable of performing a data storage and a data input/output;
• the construction equipment capable of performing a wire/wireless data communication with the starter key and transmitting construction equipment data outputted from the ECU to the starter key;
• and
• a personal computer capable of performing a wire/wireless communication with the starter key, receiving and analyzing the construction equipment data stored in the starter key, and providing a diagnosis of the ECU based on the analyzed data and maintenance information on the construction equipment using a built-in construction equipment maintenance program.