TC reported TIMS showed obstacle detected at front M1 car 'B1' door. Fault self-cleared and did not recur at subsequent stations. Staff(CTH) checked and confirm ed front M1 car 'B1' door opened and closed normally. ~~~~~ TC reported TIMS showed obstacle detected at front M1(1644) car 'B1' door. Fault self-cleared and did not recur at subsequent stations. Staff (CTH) checked and confirmed front M1(1643) car 'B1' door opened and closed normally. CE 1644 All Train Doors Proven Closed. No Obstacle Detected. Depot 1644 B1 train door operational check.  1644 B1 Door wobbly and slight stuck due to RHS outer roller damage. FOD ok. RHS door roller replaced. Push/Pull resistance pass. Do normal check and cleaning done. J rail, Guide rail, CHECK for FOD any door rubbing mark ok. Door opening closing several times and static test pass Done by Haslan/Sateesh 45207