3673 BCU fault (BCU WSP Timer 2 Activate ~~~~~ 3673 BCU fault (BCU WSP Timer 2 Activated - Time out).  3673 found FC 323. Replaced BCU. Function check - OK. No bCU fault. Wheel diameter set to 813mm. 3673 BCU S/N : OLD : 15-44-295 NEW : 14-42-052  Lee PT/Anand 43854