TC reported his Rear DT having ObstacleDetected Fault. Train performance ok. ~~~~~ TC reported his Rear DT having Obstacle        #3513 FC 740.Check obstacle height within criteria.Check ODR cal and contact-satis.Check 9154/9152-24vdc available.Check B/S ODS 49.5 ohm .Shake cable no fluctuation. A/S ODS having fluctuation 50~80 ohm.Found outer cable jacket slight tear.Tape out using electrical tape insulation and shake cable ni fluctuation 49.5 ohm. Done by Zulq/Haslan. 13/09/21