TC reported TIMS showed BCU fault at Front M2 car. ~~~~~ 2665 TC reported TIMS showed BCU fault.(L3) L3 2665 TIMS triggered BCU fault (FC308), BCU Control Pressure Fault (FC314), BCU BCP Fault Bogie 1 &2 (FC330/331), BCU Suspension Fault (FC315) at 2108hrs. From ER, #2665 lost BCP trace during time of fault. Before time of fault, BCP was normal. STBS not operated.  BIC was found isolated on car 2665 when train returned to depot. Found #2665 Brake O  indication permanently lighted with brakes fully applied. ER and TIMS showed #2665 BCP at 0 bar with brakes fully applied (Abnormal behaviour). #2665 BCU were not able to regulate brake demand, suggesting that it was unable to monitor and regulate the BCP. Swapped #2665 BCU to car #2666. Fault transferred to #2666 with BCP test point reading at 2.9 bar. Replaced faulty BCU. Wheel set changeout (#1,#2,#3,#4) notification 2528736 raised. #2665 A4 Tread Brake Unit(TBU) found abnormal mechanism noise when brake applied. Notification 2528731 raised to HM for TBU c/o.  Shafie/Kamarul 45201 BCU S/N : (after swapped) #2665 : 15-37-243 #2666 : 15-44-290 (NEW) #2666 : 15-37-246 (FAULTY) Notif 2528736 Name                          : Au Tuck Kim Date of Occurrence            : 02/10/2023 Last Service Date             :   EMU / Equipment / Location    : EMU665/Wheelset#1,2,3,4/2665 Equipment Serial No. (if any) :   Description of fault / cause  : Wheelset Heat Stress Fault Found During            : CM Reference MO                  : 11792377 Required Rectification        : Required Servicing    Notif 2528731 Name                          : Au Tuck Kim Date of Occurrence            : 02/10/2023 Last Service Date             :   EMU / Equipment / Location    : 2665/Tread Brake Unit/Axle 4                                     A-Side Equipment Serial No. (if any) :   Description of fault / cause  : Abnormal mechanism noise when brake apply during brake cyclic test. Fault Found During            : CM Measurements (if any)         :   Required Rectification        : Required Servicing