TIMS shows "BCU Emergency Boogie 1 and Boogie 2 fault" at rear M1 car 1655. No circuit breaker trip.Train performance was ok. TIMS shows "BCU Emergency Boogie1 and Boogie 2 fault" at rear M1 car 1655. No circuit break  ~~~~~ TIMS shows "BCU Emergency Boogie 1 and Boogie 2 fault" at rear M1 car 1655. No circuit breaker trip. Train performance was ok.  Fault unable to be duplicated in depot FC 328 and 329  BCU emergency BCP fault bogie 1 and 2 1655 ACU checked no leak. BCP at all cars in normal range. From ER, no abnormalities in BCP at time of fault Preventively changed out BCU at car 1655. Old SN: 1823057 New SN: 1509153 Notif: 2581140 DOne by: Sanip/Koh/Rizman/Farhan 18.3.24