TIMS showed BCU fault at car rear M2 momentarily. Fault self clear. Train performance - ok. ~~~~~ ACU soleniod exhaust port leaking-replaced with mod 4.  Also found #3570 BCP1 0.08bar during coast position-replaced ok. ACU- Old s/n: 1244-102  New s/n: 1031-024. Not: 2181002 raised. Done by Sanip/Koh. 19/07/20.