TC reported obstacle detected at Rear DTcar A4 door. Staff(RFP) checked and confirmed Rear DT car A 4 door did not open fully. SM(BDL) isolated the faulty traindoor in close position and also pasted the sticker. ~~~~~ 3632 TC reported obstacle detected at A4 door. Staff(RFP) confirmed 3632 door did not open fully. SM(BDL) isolated the faulty train door in close position and also pasted the sticker. CE : 3632 found A4 door isolated and Sticker Pasted.  3632 A4 door performed the following checks : 1) Check history DCP swapped before & date: NIL 2) Check fault code: No fault code on TIMS 3) Download ER: ER showed TC cycled doors once before door was                   isolated. 4) FOD found: Found toothpick stuck in lower guide rail 5) Weather strip condition ok: Y    6) Removed door checked roller condition ok: LHS outer roller     delaminated, replaced all rollers with iron rollers. 7) Clean J-rail & guide rail: Y 8) Push/pull door smooth & no wobble: Y (after door roller                                             replacement) 9) Door cyclic test 20x, DIR extinguish ok: Y 10) TIMS door static timing test pass: Y 11) Door lock switch red line flush with surface for positive        latching: Y 12) Door close switch actuating plate distance ok: Y 13) Door gap (criteria 63mm+1.5mm): 64mm #3632 A4 door replaced LHS/RHS outer/inner rollers with new iron rollers. (Total 4 rollers) Removed FOD (toothpick). Function test door operation - OK.  Aliff/Daniel 45289