TC reported TIMS showed Obstacle detected at Rear M1 car 'B1' door intermittently. Staff (KTB) check ed the train and feedback no problem with Rear M1 car 'B1' t rain doors. ~~~~~ 1603 TC reported TIMS showed Obstacle detected B1 door intermittently. Staff (KTB) checked the train and feedback no problem with 1603 B1 train doors. CE:3603 TIMS showed no obstacle detected, 1604 B1 door operation ok  Checked 1603 B1 door - No fault code registered. No FOD found on door guide. Push/pull door found LHS wobbiling due to inner door roller delaminated - Replaced with new roller . Performed door operating & door gauging -OK. Door cyclic 10 times -OK. Aminur/Ridzuan/Fudail/Faiz. 45193