TIMS showed Fire Internal at Front M1 car. Staff(BGS) checked and confirmed no signs of smoke / fire/ burning smell on exterior or interior of train. Train was escorted to terminal station. ~~~~~ 1533-Checked fault not duplicate. Smoke detector cleaning done. PM swop FCP (S/No:124) to 2534 (S/No:121). During swapping found 1533 FCP SDR1 relay missing. C/o with spare. Function checked-Ok.   Akhbar / M.Hairul / Zahir / Hairul S. 21.05.2024.