TC reported encountering BCU comms fault, BCU BCP fault bogie 1 and bogie 2 and BCU release fault atfront M1 car. Fault cleared after about 15 seconds. Train p erformance was ok. ~~~~~ 1614 Reported encountering BCU comms fault, BCU BCP fault bogie 1 and bogie 2 and BCU release fault at front M1-1614 car. Fault cleared after about 15 seconds. Train performance was ok.  1614 ER D/L & found FC 312/314/308. Replaced BCU & set wheel diameter. Brake cyclic test & brake pressure test - OK. All brake shoes physically released from wheel. Limited movement/depot shunting, no brake fault.  Hanafi/Chan SW 44522 #1614 BCU S/N ; OLD : 15-17-187 NEW : 1541282