TC reported BCU fault Front M1 car and train came to gradual stop before CCK2. Fault self cleared an d train managed to proceed in Auto. ~~~~~ #1556 Replaced ACU. Conduct limited movement and fault clear. #1556 ACU-Old s/n: 1038-058. New s/n: 1302-132. Not: 2122430 raised to RSW. Done by Samsudin/Loong. 20/01/20.