US Patent 11130454 On-vehicle controller

A module driver or a master obtains the load IDs of the respective first loads connected to the downstream side of the module driver, recognizes the classification of areas, such as door, roof and floor areas, or a module according to the obtained load IDs, and allocates an appropriate driver ID to the module driver in each area. Each first load has a load ID. The load IDs are allocated to the respective second loads on the downstream side of the module driver on the basis of the allocated driver ID. The area or the module is recognized on the basis of the combination of the load IDs of the plurality of first loads, whereby malfunctions caused by erroneous assembling of the first loads are suppressed.