Importance

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Abstract

When an outside handle switch, a trunk cylinder switch, a glove box switch, or the like is caused to be in an on position, a combined transmitter/receiver circuit is caused to operate through an input discriminator. The input discriminator will initiate wireless communication between a user side main controller and a subcontroller through the intermediary of an antenna. The user side main controller is formed into a card and includes a loop antenna, a combined transmitter/receiver circuit, and a microcomputer. The user side subcontroller is formed into a card and includes a loop antenna, a combined transmitter/receiver circuit, and a microcomputer. When the combined circuit receives a signal from the main card lock and subcard lock, the signal is forwarded to the user side controller position discriminator circuit. This position discriminator discriminates the vehicle outside or vehicle inside position of the main card lock and the subcard. The signal from the main card lock and the subcard is preserved provisionally in the vehicle side main controller and is then transmitted to the user side controller discriminator circuit. When the discriminator circuit receives signals from the main card lock and the subcard lock, it will discriminate between the combined signal patterns. When the discriminated signal part corresponds to the signal part related to the main card lock, the signal part from the main card lock will be delivered to a pulse conversion circuit. When the discriminated signal corresponds to the signal part related to the subcard, that signal will be transmitted.

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First Claim