METHOD FOR GUIDING REPLACEMENT TIME OF TRANSMITTER BATTERY IN KEYLESS ENTRY SYSTEM

摘要

PURPOSE: A method is provided to replace a transmitter battery a suitable time by sensing a replacement time of the transmitted battery in a keyless entry system. CONSTITUTION: A microprocessor compares a full voltage of a battery with a reference voltage(S1). The microprocessor judges whether a battery state confirm mode is selected(S2). The microprocessor turns on/off a light emitting diode for 1 second to inform that a replacement time of the battery comes(S4). The microprocessor lights the light emitting diode for 1 second to inform that a replacement time of the battery does not come(S5). The microprocessor judges whether a remote control mode is selected(S6). The microprocessor adds data informing the replacement time of the battery comes to a remote control command(S7). A high frequency receiver demodulates a high frequency signal(S8). The microprocessor judges whether the remote control command is a warning state inrush command(S9). The microprocessor judges whether the replacement time of the battery comes(S10). The microprocessor drives an actuator(S11). The microprocessor sets a vehicle to a warning state(S12). The microprocessor judges whether the remote control command is a start command(S13). The microprocessor judges whether the replacement time of the battery comes based on a battery replacement time data included in the start command(S14).