TC reported bcu fault at front M1 car. Fault self-cleared. ~~~~~ 1651 TC reported bcu fault. Fault self-cleared. To Download ER 7.05am plus and minus 30 mins and FC to check - OE.  1651 D/L ER & found FC 314 (BCU pressure fault). OPS 20 raised to follow-up C/o of ACU.  Hanafi 43878 1651 To replace ACU with spare.  1651 ACU replaced & swopped 1651 ACU transmitter to 2651. Brake pressure test - OK. Limited movement - OK. 1651 ACU S/N : OLD : 1439/029 NEW : 1541/190  Selvan/Anand 43878