Train EB was applied at track circuit W783 in Auto mode. Released EB - ok. Proceeded in Auto mode tonext station. Train subsequently EB applied in Auto mode, r eleased EB - ok. TC reported Obstacle Detector in car 3551. ~~~~~ Fault was able to duplicate in depot. FC740 confirmed Found 3551 A side obstacle detector wire fray, causing intermittent fault when wire is flexed. Rectified and reconnect wire - test ok, no fault detected ODR relay & FRP check - ok Depot shunt ok. N.A/arun/sankar/azli/16.09.22