Train doors at rear DT car "A1" door were not proven closed. TC opened and closed train doors 3 time s to clear fault. ~~~~~ 3625 A1 door were not proven closed. TC opened and closed train doors 3 times to clear fault.  3625 A1 door guide cleared of any FOD. Cleaned door roller 'J' bracket. Performed door cyclic test - OK. Performed door opening/closing speed test - OK. No DIR indication lit up when doors were fully closed.  Hanafi/Chan SW 44600