TIMS showed intermittent BCU fault at front DT car. Train performance - ok. ~~~~~ #3609 FC: 327. BCU speed probe 4 fault. Found #3609 tachogen 4 connector loose. Service connector pins and measured tachogen 4 resistance-ok. No BCU fault or W/S/S observed during depot shunting. Done by Kumar/Jack/Sateesh. 16/04/20.