1533-BCU FAULT DURING DT CHECK.TO RECTIF ~~~~~ 1533 BCU FAULT DURING DT CHECK.  1533 D/L ER. Replaced ACU & performed brake cyclic test - OK. Brake pressure check - OK. No air leak detected. Limited movement/depot shunting - OK.  Sarma/Anand 44334 #1533 ACU S/N : OLD : 1302/122 NEW : 1019/017