Patent ID: 6670883
Filing Date: 2003-12-30
Classification: B60R,G07C

Abstract:
A remote control system for a vehicle door comprising:a transmitter mounted on the vehicle for transmitting a response demand signal receivable within a predetermined range outside of the vehicle; a portable transmitter/receiver for transmitting a response signal in response to receiving the response demand signal; a vehicle mounted receiver for receiving the response signal transmitted from the portable transmitter/receiver; and a controlling means for determining whether or not the response signal received at said receiver is a valid one, and for controlling at least one of locking and unlocking of the door(s) of the vehicle in response to the valid response signal received, at the vehicle side, a voltage detecting means for detecting decrease of a voltage of a battery mounted on the vehicle to be lower than a predetermined level, which is higher than the level at which the activation of a door lock mechanism is assured, and for producing a voltage drop signal; and a function stopping means for stopping the transmission of the response demand signal in response to the voltage drop signal are provided; the portable transmitter/receiver is further provided with a manual switch for transmitting a manual control signal for controlling door lock, which is different from the response signal; and when the vehicle mounted receiver receives the manual control signal, the controlling means carries out at least one of locking and unlocking the vehicle door(s) corresponding to the manual control signal received even if the transmission of the response demand signal is stopped.