Train doors at rear M1 car 'B2' doors were not proven closed. TC recycled train doors once - ok. Fau lt did not recur at subsequent stations. ~~~~~ 1643-B4 door-Check ER & Found train door close time operation timeout. No FOD found. DLS rubber checked-Ok. J rail ok, Clean as preventive measures. Weather strip, door guide checked-Ok. Door leaf resistance-Ok. Performed door cyclic test Open & Close- DIR & Door indication light-Ok.   Stephen / Budiman.  18.05.2022.