Mobile Adhoc Network (MANET) is a group of wireless nodes that are distributed without relying on any standing network infrastructure. MANET routing protocols were designed to accommodate the properties of a self-organized environment without protection against any inside or outside network attacks. In this paper, we propose a Local Intrusion Detection Security Routing (LIDSR) mechanism to detect Black Hole Attack (BHA) over the Ad hoc On Demand Distance Vector (AODV) MANET routing protocol. In the LIDSR mechanism, the intrusion detection is performed locally using the previous node from the attacker node instead of performing the intrusion detection via the source node as in the Source Intrusion Detection Security Routing (SIDSR) mechanism. By performing the LIDSRmechanism, the security mechanism overhead would be decreased. Simulation results using the GloMoSim simulator show that the improvement ratio of the throughput gained by the LIDSR mechanism is 2.1%. The overall improvement reduction in the end-to-end delay and routing overhead are 14% and 5.5% respectively.