Train EB was applied while departing station in AM. Released EB - ok.Fault recurred at EUN2 in ATPM.ce at PYL WB and returned back to CHD via ALJ X/O. ~~~~~ 1. Fault confirmed/Fault cannot be duplicated Fault can be duplicated in depot. 2. What was found from ER/Fault Trace From ER, observed obstacle detection was captured from 0618hrs to 0706hrs intermittently and self reset and  caused EB in AM and ATPM .From TIMS observed FC740 (obstacle detected). 3. Troubleshooting details Probable Causal Factors: There are 4 identified causal factors based on FTA: 1. Obstacle detection wiring Likely Continuity checked , found resistance fluctuating  while shaking 3515 B/S obstacle detector cable. When remove cable sleeving, found obstacle detector cable dislodged from cable lug.    2. ODR faulty Unlikely .Measured coil resistance and contact resistance -Satis No anomalies and water ingress 3. Obstacle detector height out of criteria Unlikely Check obstacle detectors were intact are heights were within criteria. 4. Fire panel loss of power Unlikely No water ingress on Fire Panel .No FC on loss of power 4. Rectification details Recrimped obstacle detector wire and check continuity of wire -Satis .Performed shake test on A and B side obstacle detector wires from underframe, no fluctuations to the resistance. N.A/kumar/azli/01.03.23