TC reported TIMS showed obstacle detected at car '2616' 'B4' door at NOV NB. Fault recurred at subse quent stations. Staff(AMK) checked and confirmed car 2616 'B 4' door opened and closed normally. TC reported TIMS showed ~~~~~ 2616 TIMS showed obstacle detected B4 door at NOV NB. Fault recurred at subsequent stations. Staff(AMK) confirmed 2616 B4 door opened and closed normally.  2616 ER dL - No fault registered. Found 2616 B4 RHS outer roller delaminated, inner OK. Replaced both roller, clean J-rail & guide. Weather strip - OK. Door gap 63.7mm. Tested door open/close timing - OK. DIR extinguished when door close. Sarma/Alan 45110