1658 - BCU Fault. To check & rectify. (D ~~~~~ 1658 - BCU Fault (During DT check).  1658 ER D/L - Done. Replaced 1658 ACU. Brake pressure test - OK. Air leak test 0.3 bar/5 min - OK. 1658 ACU S/N : OLD : 1523/115 NEW : 1549/212  Selvan/Lee PT 43972