Abstract: In a system reporting a malfunction in connection of a first communication line and a desired source apparatus which is due to be connected to the first communication line. In a first memory section, information showing that the source apparatus is due to be present in the system is stored in advance and a malfunction informing apparatus connected to a second communication line. Whether or not the communication is interrupted is checked based on connection information in a second memory section and the information stored in the first memory section. The connection information shows connection history showing that the source apparatus was connected to the first communication line. Through the second communication line, it is informed to a destination apparatus that there is a malfunction in the connection of the source apparatus and the first communication line, when it is checked that the communication is interrupted.

Abstract: In a system reporting a malfunction in connection of a first communication line and a desired source apparatus which is due to be connected to the first communication line. In a first memory section, information showing that the source apparatus is due to be present in the system is stored in advance and a malfunction informing apparatus connected to a second communication line. Whether or not the communication is interrupted is checked based on connection information in a second memory section and the information stored in the first memory section. The connection information shows connection history showing that the source apparatus was connected to the first communication line. Through the second communication line, it is informed to a destination apparatus that there is a malfunction in the connection of the source apparatus and the first communication line, when it is checked that the communication is interrupted.

Abstract: A data relay unit capable of relaying data communication between first and second networks interchanging different structures of data, a gateway (GW) and a method are provided. An identifier is assigned to transmission data and reception data exchanged in a GW unit. A data conversion section specifies a conversion process using reception data for generating transmission data for each transmission data piece identified by an identifier and uses a conversion table to store conversion processes. The data conversion section can generate intended transmission data based on an identifier of the transmission data to be transmitted by selecting and executing a necessary conversion process from the conversion table. Even when a method of generating transmission data is added or changed, it is only necessary to add or change a conversion process in the conversion table.

Abstract: When starting an engine using its remote engine starter function in a guard mode, an engine control ECU outputs an engine status signal at H level prior to driving a starter motor. An anti-theft control device, upon reception of the signal, stores the engine operating status in a mode storage device and lower the detection sensitivity of sensors. This allows no false alarm to be generated, if the anti-theft system is initialized by the decreased voltage of battery at the time of driving the starter motor. In addition, the detection sensitivity of the sensors is low until the engine stops running, so that the sensors do not have risks torroneously detect the vibration of vehicle as an intruder.

Abstract: When starting an engine using its remote engine starter function in a guard mode, an engine control ECU outputs an engine status signal at H level prior to driving a starter motor. An anti-theft control device, upon reception of the signal, stores the engine operating status in a mode storage device and lower the detection sensitivity of sensors. This allows no false alarm to be generated, if the anti-theft system is initialized by the decreased voltage of battery at the time of driving the starter motor. In addition, the detection sensitivity of the sensors is low until the engine stops running, so that the sensors do not have risks torroneously detect the vibration of vehicle as an intruder.