A model diagnosis device includes a communication device able to communicate with a plurality of vehicles in each of which learning of a neural network model is performed and a learned neural network model is generated, a storage device, and a control device judging abnormality of the learned neural network model. The control device stores values of an output parameter output from the learned neural network model for predetermined values of input parameters in the storage device, when receiving a new learned neural network model or a value of an output parameter output from the new learned neural network model for the predetermined values of the input parameters from one vehicle of the plurality of vehicles through the communication device, performs statistical processing on the value of the output parameter, and judges abnormality of the new learned neural network model based on a result of the statistical processing.

A power supply circuit for supplying power to an electric load of a vehicle includes a relay and a relay control circuit. The relay is configure to be turned on when enabling the supply of power to the electric load and configured to be turned off when interrupting the supply of power to the electric load. The relay control circuit is configured to turn on the relay when an ignition of the vehicle is on regardless of a state of an operation part that is to be operated by a driver to operate the electric load.

A vehicular circuit body includes a trunk line that includes a power source line and a communication line, and that is routed in a vehicle body; and a plurality of control boxes that are disposed in a distribution manner along the trunk line. The trunk line includes a first trunk line portion extending in a front-and-rear direction of the vehicle body and a second trunk line portion extending in a leftward-and-rightward direction of the vehicle body. The plurality of control boxes include a branch control box that connects the first trunk line portion and the second trunk line portion, and distributes power from one of the first trunk line portion and the second trunk line portion to the other one.

Disclosed is a power distribution system, comprising a power feed line configured to supply electric power of a given power feed line voltage, a plurality of solid state power control modules connected to the power feed line; each of the solid state power control modules comprising at least one solid state power controller connected to at least one load to be supplied with power from the power feed line and configured to selectively connect the respective load to the power feed line or to disconnect the respective load from the power feed line; the power feed line comprising at least one power feed line segment connecting two adjacent solid state power control modules; wherein the at least two adjacent solid state power control modules are connected by a further electric line connected in parallel to the at least one power feed line segment.

A vehicular circuit body includes a trunk line that extends in a front-and-rear direction of a vehicle, a plurality of control boxes that are provided on the trunk line, and a branch line that connects the control box to an accessory. The trunk line and the branch line each includes a power line having a predetermined current capacity and a communication line having a predetermined communication capacity. The vehicle is divided into a plurality of regions. At least two control boxes are disposed in the regions which are different from each other, each of which includes a gateway conversing communication methods for the communication line of the branch line and the communication line of the trunk line. A plurality of the gateways are able to communicate with each other via the communication line of the trunk line.

An in-vehicle communication system comprises a plurality of in-vehicle relay devices, each including a plurality of first connection units, an in-vehicle communication device connected to each one of the first connection units, a plurality of second connection units to which another one of the in-vehicle relay devices is connected, and a relay processing unit that relays messages between the in-vehicle communication devices connected to the first connection units and the in-vehicle relay devices connected to the second connection units, wherein two of the in-vehicle relay devices are connected to one another via two or more communication lines. The in-vehicle relay devices each include a storage unit that stores relationships between identification information attached to messages received via the first connection units and the second connection units corresponding to transmission destinations of the messages, and updates the relationships according to a communication status of communication via the second connection units.

Systems and methods are provided for enhancing diagnosis of control logic by automatically triggering latent or quiescent diagnostic logic in response to a CAN bus signal and without requiring a software update of the control logic. The diagnostic logic may be triggered to provide an increase in the frequency of CAN messages that are generated. The diagnostic logic may be further triggered to provide a generation of additional CAN messages reporting operation signals beyond those that are normally generated. The diagnostic logic may be further triggered to provide higher priority to selected CAN messages reporting operation signals. The diagnostic logic may be still further triggered to one or more of increase the frequency of selected CAN report messages, generate additional CAN messages reporting operation signals beyond those that are normally generated, and/or provide higher priority to selected CAN messages reporting operation signals, each without requiring a software update.

A system and method for protecting the bus in an autonomous vehicle are provided. The protecting system can determine, by a vehicle computer, that there is a fault in a first bus of the autonomous vehicle and determine a route of communication for one or more components of the autonomous vehicle that are connected to the first bus. The route of communication in the protecting system can traverse a second bus in the autonomous vehicle.

A cable system for a truck trailer for reducing the number and/or size of wiring in a commercial trailer cable system from seven to four, three, or two, while also facilitating bidirectional communication with all connected electronic devices in the trailer. The cable system has a ground cable, a power cable, and zero, one or two additional communication cables that may carry analog and/or digital communications between the control circuit and components of the trailer such as turn signal lamps, brake lamps, backup cameras, environmental sensors, and the like. A transformer for increasing the voltage on the power cable is disclosed, allowing the power and ground cables to be smaller without reducing power delivered to the trailer.

A vehicle. The vehicle has a front region zone, a right-hand cabin zone, a left-hand cabin zone, and a rear region zone. Each zone has a defined number of zone controllers.