TIMS showed BCU fault at car 2552. Faultself-cleared. Train performance - ok. TIMS showed BCU fault at car 2552. Fault self-cleared. Train performance - ok. ~~~~~ 2552 TIMS showed BCU fault.    Fault self-cleared. Train performance - ok.  2552 FC 308/332/331. Unable to D/L ER due to events occurred time/date not tally with events records. Swapped #2552 ACU with #1552. Replaced ACU at #1552. Brake cyclic test & no air leak & no residue pressure at COAST. Brakes able to release at COAST. Limited movement/depot shunting - OK.  Sarma/Alan/Lee PT/Kamarul 45067 ACU S/N : (after swapped/replaced) #2552 : 1042/070 #1552 : 1301/122 (NEW) #1552 : 1008/004 (FAULTY)