Train came to gradual stop with no faultindication. TC did a brake status check - fault cleared and able to proceed. ~~~~~ 3674 came to gradual stop with no fault indication. TC did a brake status check - fault cleared and able to proceed.  673/674 ER D/L - Done. 2673 brake pressure at 0.3 bar when at COAST - Replaced ACU. Brake pressure test - OK (refer to attachment for results). Limited movement - OK. 2673 ACU S/N : OLD : 1539/171 NEW : 1538/168  Chan GF/Selvan 43922