Train doors not proven closed. TC openedand closed manually few times to clear fault.TC feedback fa ult was at rear DT car 3629 B4 door.d confirm no abnormalities after monitoring for 3 stations.  ~~~~~ Train doors not proven closed. TC opened     Check #3629 A1,A4,B4 DLS ok.No FOD found,push/pull resistant check 5kg-5.5kg ok.Further check found A1,A4,B4 door mating out of cateria (6203mm-62.8mm)After adjust 63.5mm-64.5mm ok.Perform door cyclic test ok. Done by Koh/Sanip/Firdaus. 30/10/20