TIMS showed intermittent brake fault atRM2 car. Train was scheduled withdrawal to BSD3 ~~~~~ TIMS showed intermittent brake fault at     #2031 Checked no air leakage.Brake tested ok. Change out ACU for preventive maintenance.ER unable to download for rectification.Brake test ok-within range after ACU changeout. ACU-New s/n: 1310-143  Old s/n: 1038-861 Not: 2123397 raise to RSW. Done by Shamir.  22/01/11