Providing a secure communication in Mobile Ad-hoc Network (MANET) is one of the demanding and critical task in recent days, due to its dynamic nature. So, the traditional works focused to develop a secure routing protocols for detecting the harmful attacks in network. But, it failed to ensure the fault free link during communication, which affects the entire performance of the network. Also, it follows a single stage attack detection process, in which the attacks are detected at before routing or during data communication. So, the detection accuracy of the existing techniques is not highly efficient. Thus, this work motives to introduce a new routing mechanism, namely, Secure Link Aware Fault Detection (SLFD) for enabling a secure and fault free data communication in MANET. At first, the neighbor discovery and route discovery processes are performed by sending the HELLO packets and RREQ to the neighboring nodes that are in the range of < 200m. After that, the attack detection process is performed by analyzing the behavior of the malicious nodes. In this environment, two harmful attacks such as black hole and gray hole are detected and blocked before communication. Then, the route between the trusted nodes are enabled by analyzing the link paths with the use Genetic Algorithm (GA). Furthermore, the data is transmitted by generating the bogus key and validating the authenticity of the nodes. During this process, the Jitter is also estimated for identifying the compromised nodes in the route. During simulation, the effectiveness of the proposed system is analyzed and validated by using different performance measures. Also, the superiority of the SLFD is proved by comparing it with the existing approaches.