Train undershoot platform in Auto mode.Proceeded in ATPM mode to the headwall with BCU Fault on TIM S at Front M1 car. Fault self-cleared. ~~~~~ Train undershoot platform in Auto mode.     #1618 Fault code 331.330,314,312,308.Brake cyclic check found #1618 ACU solenoid exhaust v/v air leak when EM to coast.Replaced ACU and brake cyclic test ok. ACU-Old s/n: 1442/033  New s/n: 1447/050 Not: 2133175 Raise to RSW. Done by Rahul/Zulqarnain. 20/02/20