TC reported intermittent BCU fault at Rear M2 car when train is stationary at station ADM1 and WDL1. ~~~~~ 2570 TC reported intermittent BCU fault when train is stationary at station ADM1 and WDL1.  2570 found BCU fault (FC 308/330/331). Transferred 2569 ACU to 2570 & installed new ACU on 2569. Function checked brake pressure for both cars - OK. Limited movement/depot movement & no sign of BCU fault occurred. ACU S/N : 2569 : 1310/140 (Installed on #2570) 2570 : 1301/124 (Removed for repair) NEW  : 1019/021 (Installed on #2569) BCU S/N For #2570 : 1816/161  Wong/Anand/Nizam 44075