TC reported brake fault at car front M2.TC operated STBS to proceed to ATPM to next station. ~~~~~ TC reported brake fault at car front M2.     #2532 Shown fault code 308,312,330,331.STBS was operated,BIC was isolated.Normalise both done.Conduct brake cyclic test and ACU RF solenoid air leak at coast to RM and heavy air purge when put coast.Replace ACU done.Conduct brake cyclic test BCP within spec.ACU no abnormalities.Reseal #3532 STBS to monitor. ACU:- Old s/n: 1008-008 New s/n: 1024-007 Not: 2448627 raise to CSC. Done by Zulq/Asruddin.  29/12/22