TIMS showed BCU fault at front M1 car. Fault self-clear. TC performed brake status check - okay. Tra in performance - ok. ~~~~~ TIMS showed BCU fault at front M1 car. F     #1552-fc 308/330/331.Brake cyclic found ACU hunting from EM to Coast.Replace ACU & function test brake cyclic-ok. BCP within criteria.No ACU leak or hunting. ACU-New s/n: 1037/048   Old s/n: 1912/157 Not: 2242267 raise. Done by Saini/Asruddin/Haikel   25/01/21