TC reported TIMS showed intermittent DIRand door fault at front M1 car A2 door. SM(YWT) checked the train and feedback front M1 A2 door did not opened at YWT N B. Doors opened as per normal at CCK NB and SM feedback ther ~~~~~ 1603 TC reported TIMS showed A2 door intermittent DIR and door fault. SM(YWT) checked the train and feedback front M1 A2 door did not opened at YWT NB. Doors opened as per normal at CCK NB and SM feedback.  1603 TC cycled A2 door once to no avail. Door was isolated subsequently. Found FC 043 A2 door close opearation time-out. FC 973 B3 door close operation time-out. FC 993 B4 door close operation time-out. TC cycled doors once for B# & B4 to clear fault. #1603 A2/B3/B4 doors checked/found all door rollers damaged/worn-out. Replaced all door leaf rollers. Function check, door cyclic check, door gap 63.5mm, door open/close timing - OK. All doors proven closed & no DIR indications found lit up. Swapped DCP from A2 to B2, B3 to A3 & B4 to A4 on #1603.  Sarma/Sugu/Anand/Alan/Lee PT/Shafie/Kamarul 44953 #1603 DCP S/N (after Swapped) : A2 - 1405W020041S015 B2 - 1405W020041S012 A3 - 1405W020041S021 B3 - 1405W020041S061 A4 - 1405W020041S013 B4 - 1405W020041S014