TC reported brake fault at Front M1 car.TC operated STBS and proceeded in ATPM to next station to d etrain pax. SM(MRB) then assisted to operate BIC at MRB. ~~~~~ 3611 TC reported brake fault at Front M1(1611) car. TC operated STBS and proceeded in ATPM to next station to detrain pax. SM(MRB) then assisted to operate BIC at MRB. (Level 3) L3 1611 FC 308,301, 307 at 2032hrs. In depot able to duplicate. TIMS brake bcp page 1611 show (-). BIC was isolated. 3611 STBS was activaed. Replace BCU and Function check ok. Brake cyclic check ACU no abnormalities, no looseness of solenoid. Before replace BCU check cannon plug no sign of looseness. Brake status, Phisical on/off ok. Able to release at coast, Apply at b3. Check both cab BRER able to energise and deenergise. BCP within criteria, Dump valve test ok. Limited movement and depot shunting ok. Powering gate available. ER and fault trace download. 1611 BCU Old:15-13-175 new:15-49-310 Notif csc:2549212 Done by saini/Haslan/Zulq 45267