TIMS showed BCU fault at car 1569. Trainperformance - ok. ~~~~~ 1569 TIMS showed BCU fault. Train performance - ok.  1569 BCU fault, ER D/L found FC 308/321/322. Found all service brakes exceeded EM brake criteria. Brake cyclic test & no abnormal air leak found at #1569. Swapped #2569 ACU to #1569 (S/N : 1024/025) Replaced new ACU on #2569 (S/N : 1047/085) Checked brake release/application operation - OK. Brake pressure check - OK.  Suhairi/Syukur/Ahmad/Syairazi 44936