2540-BCU FAULT DURING TRAIN PREP. ~~~~~ 2540-BCU FAULT DURING TRAIN PREP.  2540 BCU fault unable to duplicate fault. As PM, swapped 1540 BCU with 2540 & set wheel dia setting accordingly. Before swapping: 1540: 1812103 2540: 1813110 Swapped 2539 ACU with 2540. Replace ACU on 2539. 2540: 1047/078 - After swapping. 2539: 1301/122 - After replaced 2540: 1038/063 - Faulty ACU.  Ahmad/Syukur/Syarazi/Suhairi/Fandi 45189