3533 - BCU fault (DT Check) ~~~~~ 3533 - BCU fault (DT Check).  3533 ER D/L - Done. Replaced ACU & swopped BCU to 1533 - Done. Brake pressure test - OK. 3533 ACU S/N : OLD : 1048-034 NEW : 1311-059  Selvan/Lee PT 43984