Method for displaying warning message of smart key system

A method for displaying a warning message of a smart key system, comprising:

• a first step in which a control part of a smart key system generates two or more warning messages corresponding to two or more abnormalities/warnings, when the two or more abnormalities/warnings occur;
• a second step in which the control part repetitively and sequentially renews and inputs the two or more warning messages to a message queue buffer and controls the message queue buffer to buffer and output the two or more warning messages such that the two or more warning messages are circularly displayed on a display part;
• a third step in which the control part generates a new warning message corresponding to a new abnormality/warning, repetitively and sequentially renews and inputs the new and the two or more warning messages to the message queue buffer, and controls the message queue buffer to buffer and output the new and the two or more warning messages;
• and
• a fourth step in which the control part stops renewing and inputting at least one of the two or more warning messages to the message queue buffer when a message renewal time expires for the at least one of the two or more warning messages, wherein the message renewal time expires within a first predetermined time period,
• wherein in the fourth step, when message renewal times for the two or more warning messages expire, the control part repetitively renews and inputs only the new warning message to the message queue buffer and controls the message queue buffer to buffer and output the new warning message, for a second predetermined time period,
• wherein the second predetermined time period is shorter than the message renewal times for the two or more warning messages.