TC reported TIMS showed obstacle detected at rear DT car. ~~~~~ TC reported TIMS showed obstacle detecte     Checked & confirmed Tims show obstacle detector triggered on #3553.Checked fire control panel lines 9152,9154-24vdc present ok.Checked 3553 ODR-coil resistance when cool-5400 ok.Observed material build up on interior wall of relaycasing-preventively replaced.Check 3553 obstacle deflector height and obstacle detector wire-50mm.Obstacle detector wire found no damage. Done by Lim Jun Hong/Khairudy. 28/01/22