TC reported TIMS showed front M1 car obstacle detector at 'A2' door. Train doors able to close autom atically. Staff(WDL) checked and confirmed no abnormalities. ~~~~~ TC reported TIMS showed front M1 car obs     #1652-A2 door checked door guide rail no FOD found.Checked door mating strip and weather strip for dislodged or deformality all ok.Found #1652-A2 RHS door roller worn out.Replaced roller-ok.Pull/push 7kgok.Door mating strip measurement 63.5mm-ok.Door function/cyclic test ok. Done by Kumar/Jack/Sateesh/Koh. 13/05/20