Train doors at Rear M1 car were not proven closed. TC recycled train doors once - ok. Staff(DBG) che cked and confirmed no train doors abnormalities. Fault did n ot recur at subsequent stations. Train doors at Rear M1 car ~~~~~ 3644 Train doors at Rear M1 car were not proven closed. TC recycled train doors once - ok. Staff(DBG) confirmed no train doors abnormalities. Fault did not recur at subsequent stations.   1) Check history for 1643 for any DCP swapped before & date: No records for 1643. 2) Check fault code: NIL 3) Download ER & Fault Trace: TC cycled doors once to clear fault. 4) FOD found: N 5) Removed door checked roller condition ok: Y ( using scope to check ) 6) Clean J-rail & guide rail: Y 7) Push/pull door smooth & no wobble: N 8) Door cyclic test 20x, DIR extinguish ok: Y 9) TIMS door static timing test pass: Y 10) Door lock switch red line flush with surface for positive latching: Y 11) Door close switch actuating plate distance ok: Y Checked 1643 all doors ok. Alan/Sarma/Kamar 45255