TC reported BCU fault on car 1505.b TC unable to receive TSC radio messages. TC reported BCU f ault on car 1505.ages. ~~~~~ 1505 TC reported BCU fault. S/cab TC unable to receive TSC radio messages.  1505 FC 308(BCU fault), 330 (BCU fault Bogie1), 331 (BCU fault bogie2). Swapped and replaced ACU from #1505 to #2505. New ACU installed on #2505. Brake cycle - ok. No residual pressure at coast. Brakes able to release physically. Limited movement - ok. Depot shunting - ok. After swap ACU s/n: #1505: 1019/022 #2505: 1037/055 (new) Faulty: 1024/033  Alan/Kamarul/Lee PT/Sugu 45312