Train doors at Rear DT car B2 door werenot proven closed. TC recycled train doors once - ok. Fault did not recur at subsequent stations. ~~~~~ 3623 B2 Train door were not proven closed. TC recycled train doors once - ok. Fault did not recur at subsequent stations.  3623 checked ER & found FC 933 (Saloon door B1 close operation timeout). No history of DCP being swapped before. TC reported on the wrong saloon door. D/L ER & fault trace, found TC cycled door once. FOD found, weather strip condition checked - OK. Door gap 66mm & need to be adjusted to 63mm. Used scope to check roller condition - OK. Cleaned J-rail & guide rail. Push/pull door & motion was smooth & no wobbling. Checked door lock s/w red line flushed with surface for positive latching. Door close s/w actuating plate distance - OK. Door cyclic test & DIR extinguished when doors were closed. OPS 20 raised to adjust door gap.  Ashvin 44967 3623-TO ADJUST B1 DOOR GAP.  3623 B1 door gap adjusted to 63mm (required criteria). Performed door cyclic test - OK.  Sugu/Anand 44967