Abstract: A network system for judging abnormality of a self node with high precision on the basis of information from other nodes connected to a network is provided. In each node, a frequency at which data frames to be transmitted/received among nodes cannot be received is counted every communication partner node by a reception time-out error count unit. After some node is reset and restored, a start-up signal is transmitted with an initial data frame by a start-up signal transmitting unit of the node concerned. In the other nodes receiving the start-up signal, a count result of the transmission destination node of the start-up signal by a reception time-out error count unit is returned by the monitoring result returning unit, and upon reception of the count result, the node which transmits the start-up signal makes a self-diagnosis by a self-diagnosing unit.

Abstract: An engine control apparatus in which, when it is detected by a starter switch that a starter has changed-over from a drive state into a non-drive state, an ECU (engine control unit) predicts a time period in which an engine is completely stopped, on the basis of a revolution speed of the engine at that time, so as to turn OFF an output of a starting motor relay for the predicted period.

Abstract: A network system for judging abnormality of a self node with high precision on the basis of information from other nodes connected to a network is provided. In each node, a frequency at which data frames to be transmitted/received among nodes cannot be received is counted every communication partner node by a reception time-out error count unit. After some node is reset and restored, a start-up signal is transmitted with an initial data frame by a start-up signal transmitting unit of the node concerned. In the other nodes receiving the start-up signal, a count result of the transmission destination node of the start-up signal by a reception time-out error count unit is returned by the monitoring result returning unit, and upon reception of the count result, the node which transmits the start-up signal makes a self-diagnosis by a self-diagnosing unit.

Abstract: An engine control apparatus in which, when it is detected by a starter switch that a starter has changed-over from a drive state into a non-drive state, an ECU (engine control unit) predicts a time period in which an engine is completely stopped, on the basis of a revolution speed of the engine at that time, so as to turn OFF an output of a starting motor relay for the predicted period.

Abstract: A fail-safe device includes an intake air amount sensor, a throttle position sensor for detecting a throttle opening degree of an electronic throttle controller, an accelerator position sensor for detecting an accelerator opening degree as an amount of pressing down on an accelerator, an intake air amount control unit for controlling the intake air amount to the engine, a target air-fuel ratio control unit for controlling a fuel injection amount to be supplied to the engine, a target ignition timing control unit for controlling ignition timing of air-fuel mixture inside a cylinder of the engine; and an electronic throttle control system abnormality warning unit for deciding, when a first requirement and a second requirement are satisfied based on the output of each sensor, that the electronic throttle controller is in failure, and for, prior to warning of the abnormality of the electronic throttle controller, controlling each of the control units.

Abstract: A fail-safe device includes an intake air amount sensor, a throttle position sensor for detecting a throttle opening degree of an electronic throttle controller, an accelerator position sensor for detecting an accelerator opening degree as an amount of pressing down on an accelerator, an intake air amount control unit for controlling the intake air amount to the engine, a target air-fuel ratio control unit for controlling a fuel injection amount to be supplied to the engine, a target ignition timing control unit for controlling ignition timing of air-fuel mixture inside a cylinder of the engine; and an electronic throttle control system abnormality warning unit for deciding, when a first requirement and a second requirement are satisfied based on the output of each sensor, that the electronic throttle controller is in failure, and for, prior to warning of the abnormality of the electronic throttle controller, controlling each of the control units.