TC reported TIMS showed obstacle detected at front M1 car 'A2' door when train doors opened at platf orm. Unable to clear fault. Staff (DBG) checked the train an d feedback Front M1 car 'A2' door able to open and close but ~~~~~ Open Close speed pass: Yes FOD found: No Door cycle 20x: Yes Rubbing marks: No Door Push/Pull force: 10.5Kgf Door mating gap: 64mm Check Door Lock Switch red line when door closed (should be at half or at most flushed with the step) - satis Door Lock Switch Cushion Rubber intact: Y Door Close Switch distance from actuating plate: 15.0mm    Door Wobble: Yes Rectification Actions: Checked and found 1652 A2 door to be very stiff during door operation. LHS outer roller found to be damaged. Replaced both LHS and RHS door roller to iron roller and function test-smooth. Serviced guide rail and j-rail. Conducted door static and cyclic test-satis Done by: Haslan and Asruddin