TC reported TIMS showed BCU fault at car1663 and fault self-cleared. ~~~~~ TC reported TIMS showed BCU fault at car    Tims show car #3663 FC 327-BCU speed probe 4 fault.No brake related fault codes registered on car #1663 on 28/01/21. Check and found Tacho 4 fluctate,replace Tacho 4 and resistance check ok.Depot shunting ok.No reoccurance of fault or W/S/S. Tacho 4-Old s/n: 15/16/558  New s/n: 1229196 Not: 2243822 raise. Done by Zulq/Haslan/Haikel  29/01/21