Wire harness system

A wire harness system (10) is constructed by node connectors (11,12,14,15) including multiplex communication controllers. A token reception controller for receiving a token through a timing bit set that is issued for each predetermined time period is provided for the multiplex communication controllers of the node connectors. A controller including a CPU is provided only for a specific node connector, and the multiplex communication controllers permit multiple node connectors to use, in common, data that is stored in this controller.