A parallel mounted MEMs optical diagnostic switch disposed within an optical connector for directing optical signals from one or a plurality of light sources to one or a plurality of light collectors by activating a feedback loop through the use of micro electro mechanical systems (MEMS). The present invention includes one or more mirrors mounted parallel to the path of optical transmission through the tool. The mirrors and can be automatically activated at power up or selectively thereafter for detecting faults in any upstream fiber optic component. When in the passive mode, the present invention retracts away from the optical path so as not to interfere with normal system operations.