Ad hoc wireless mobile network does not have any fixed infrastructure. Therefore all nodes are able to move freely in the network and they are connected dynamically to each other in arbitrary manner. The routing protocol is used to discover a route, if mobile nodes are not within the wireless range of each other. Efficient Routing Protocol (ERP) scheme is proposed for communication in the mobile ad hoc network. ERP defines a new metric average active path count for routing. In ERP, possible routes are discovered and then select a route for communication that has less traffic. ERP decreases congestion and increase packet delivery ration which ultimately enhances the network performance.