ATS alarm showed train doors status lost. TC reported DIR illuminated with no DMI and no door open i ndication on TIMS. TC opened and closed train doors at KTB N B several times but to no avail. TC also opened/closed cab d ~~~~~ From ER, #3562 DIR dropped when train in motion. #3562 occupied in AM mode. #3562 DIRBS was operated for train to withdraw in ATPM. Fault not duplicated. 10/20mm done for all saloon doors-ok. DIR, DMI, Tims ok. Cab door tug test ok. No intermittent DIR. Saloon door speed-ok. SDIR in ER-ok. Detrainment door-ok. From ER observe #3561 DIR able to energise when cab in #3561 occupied. Postulate #3562 COR-6 relay intermittent. Side finding: #3561 B/side cab door stiff. Ops 0020 to service and ensure all 4 cab doors torque mark ok. Done by Ashwin.  7/03/23. Replaced COR-6 relay at #3562 and function test ok. Adjusted and cleaned #3561-B/S cab door guide rail. Function test ok, cab door able to open/close as per normal. Checked all 4 cab doors torque marks ok. Checked line 2839 to 2841-satis. B1 to 2839-satis. COR-6 relay at #3561 slightly higher contact resistance between pin 6-9 (line 2839) 2.4ohm as opposed to 0.1-0.2ohm. Replaced COR-6 relay at #3561 function test ok. 0030 raise to replace #1562-B1 door actuator due to leaking. Done by Jack. 07/03/23. #1562-B1 door replace actuator and function test ok. Conduct 10/20mm ok. Door static open/close ok within criteria.    #1562-B1 door actuator:- Old s/n: 130-412. New s/n: 89-343. Not: 2468433 raised to CSC. Done by Saini/Asruddin/Zulq.  08/03/22.