TIMS showed Smoke External Alarm at car 1531. Staff(RFP) & Staff(CTH) checked and confirmed no signsof smoke / fire / burning smell on exterior or interior of train. Rear T341 line clear and confirmed no abnormalities. ~~~~~ Replaced new smoke detector unit. To be monitor at ML.  M.Hairul / Akhbar 16.08.2023 Smoke detector S/N: Old:   NEW:SD-010