TC reported train doors at car 3645 didnot opened. Staff(MSP) checked and confirmed car 3645 'B2' d oor did not opened. Staff(MSP) later isolated the defective train door in closed position. ~~~~~ 3645 TC reported train doors did not opened. Staff(MSP) confirmed 3645 'B2' door did not opened. Staff(MSP) later isolated the defective train door in closed position. CE : Found 3645-B2 door.lsolated with FAULTY DOOR Sticker Pasted. In closed.  3645 B2 door performed the following checks : FOD found: N Weather strip condition ok: Y Roller condition ok: N, 3645 B2 RHS outer roller delam Clean J-rail & guide rail: Y Door cyclic test 20x, DIR extinguish ok: Y, after rectification TIMS door static timing test pass: Y, after rectification Door lock switch red line flush: Y Door close switch actuating plate distance ok: Y Replaced #3645 B2 door rollers to iron rollers.  Sarma/Alan/Lee PT/Shafie 45326