TC reported train doors at car 3682 notproven closed. TC opened and closed train doors once - ok. ~~~~~ TC reported train doors at car 3682 not     #3682-B2 door fault code: 953 happen only once and cleared.Check guide rail,J rail no sign of FOD.Clean guide rail & J-rail ok,Push/pull 3-4kg.Mating within criteria.DCS to plate-14.5.Opening/closing time-3.3sec.Open and closed door few times ok.No re-occurance of door fault. Checked by Johua/Koh/Zulq.  28/12/20