When train arrived at UPD TB2, IMDC(RS)adviced not to use the train as it earlier had no forward mo vement in UPD. Train was routed back to UPD. Subsequent trai n launchings were affected. Trains on mainline were reformed ~~~~~ 3613 SIR able to be set. Train able to proceed in both FOR/REV. Checked A/s & B/s Obstacle Detector, 55mm clearance from TOR. No SIR tripped when A/s & B/s cables were flexed. Checked SIR 1-1, 1-2, 2-1 & 2-2 energised & contact resistance. Checked RMR-1, CM3R, DORA3, DORB3, CDORA-2, CDORB-2 & SR relay energised. SR contact - OK. NOTE : DORA3, DORB3, CDORA-2, CDORB-2 did not energise when SR energised.  Chan SW/Hanafi. 17/12/2020.     3613 CM3R relay replaced as instructed by EMM. Function test both cabs & SIR able to be set. Brake pressure check - OK.  Aminur/Azmi. 17/12/2020.