Abstract: A multiplex communication system having a data repeater, which can prevent data from being lost so as to improve reliability of data communication, when a data repeater of a multiplex communication system repeats data. A multiplex communication system is made up of a plurality of communication groups including a plurality of communication lines and a data repeater. The data repeater is made up of receiving buffers, sending buffers, a data controller and a transfer-address table. The data controller selects multiplex communication lines through which the received data is to be repeated and transfers the received data thereto. The data controller has a priority-reset means for increasing a priority of a received data before being sent. The priority-reset means prioritizes a sending of the data from the data repeater, even if the data sent from the data repeater collides with the other data on the multiplex communication lines through which the received data is to be repeated.

Abstract: A door lock release device includes an actuator for releasing a door lock, a first detection means for detecting an operation of a door handle, a first control circuit for controlling an actuation of the actuator based on the detected door handle operation, a second detection means for detecting a vehicle state, and a second control circuit independent from the first control circuit for controlling the actuation of the actuator based on the detected vehicle state.

Abstract: The present invention relates to a display system for a theft-preventing apparatus mounted on a vehicle, and an object of the present invention is to provide a display system in which a display device can be commonly used for two kinds of theft-preventing apparatuses. A security ECU (20) outputs a continuous lighting signal when set to a waiting state, and stops outputting the signal in a cautioning state. An immobilizer ECU (22) outputs a blinking signal to a light-emitting device (50) only when the cautioning state is set. Accordingly, the light-emitting device (50) is turned off when both the security apparatus and the immobilizer apparatus are set to a resting state. Additionally, the light-emitting device (50) is continuously lighted when the security apparatus is in the waiting state. Further, the light-emitting device (50) is being blinked when the security apparatus is not set to the waiting state and the immobilizer apparatus is set to the cautioning state.

Abstract: A vehicle antitheft system and method which effect re-registration and erasure of codes without using a tool used exclusively for such purposes. By the time T1 seconds has elapsed from the time a master key, in which a code is registered, is inserted into a key cylinder, turning an ignition switch from off to on is repeated five times. When opening and closing of a door is repeated six times and the ignition switch is turned off and the key is removed from the key cylinder in the next T2 seconds, a mode is changed to a master key code registration mode. When a master key whose code is to be registered is inserted into the key cylinder within T3 seconds from the time when a master key in which a code is registered is removed from the key cylinder, and the ignition switch is turned on within T4 seconds, an identification code to be registered is read from a transponder. When T5 seconds has elapsed, the read identification code is registered in the memory as a registered code.

Abstract: When a vehicle enters into the lower portion of a shielding member, a headlamp is switched on, and a condition flag is set to Set 1 which represents a waiting state in which the vehicle exterior is estimated to become bright/dark intermittently. When the condition flag is set to Set 1, when the vehicle enters into the lower portion of the shielding member, the condition flag is set from Set 1 to Set 2 which represents an intermittent state in which the vehicle exterior becomes bright/dark intermittently with high possibilities. When the condition flag is set to Set 2, a switch-off extension time CFE and a switch-off delay time CTF make a time until the headlamp is switched off. As a result, the time until the headlamp is switched off is delayed, and the headlamp is required to remain switched on at portions where the vehicle exterior becomes bright/dark intermittently.

Abstract: An alarm operation is activated by closing all vehicle doors (S11). When all doors are locked (S12), an active alarm awaiting state is set (S13) and, when all doors are not locked (S12), a passive alarm awaiting state is set (S16). When all the doors are locked after a passive alarm awaiting state was set (S17), the passive alarm awaiting state shifts to an active alarm awaiting state. Then, whether or not all doors are unlocked is judged (S14). If they are unlocked, the alarm awaiting state is released (S15). If the alarm mode is preserved intact, without shifting to be in an active alarm mode, the alarm awaiting state is released (S15) by turning on an ignition or accessory switch within fifteen seconds after a door was opened (S18).

Abstract: A first carrier signal generator (15) generates a carrier signal (S1) at a first frequency to modulate a preset identification code (S). A second carrier signal generator (16) generates a carrier signal (S2) at a second frequency, distinct from the first frequency. A modulator (14) affixes the identification code (S) to the carrier signal (S2), and outputs the carrier signal (S2) to a light-emitting circuit (17). When a "smart" or "learning" remote controller, of the type that demodulates frequency, receives the identification code (S), the carrier signal (Sw) of the second frequency is demodulated at the first frequency, compressed and stored in memory. The carrier signal (S2) set at the second frequency can cause the memory capacity of the remote controller to overflow, thereby preventing the identification code (S) from being stored in the learning remote controller.