TIMS showed Smoke Internal at car 1540.Staff(YCK) checked and confirmed no signs of smoke / fire / burning smell on exterior or interior of train. Train was es corted to terminal station. ~~~~~ 1540 TIMS showed Smoke Internal. Staff(YCK) confirmed no signs of smoke/fire/burning smell on exterior or interior of train. Train was escorted to terminal station. CE: 1540 Internal smoke reset monitored ok  1540 FC 720 registered. Replaced SDR1 as PM. TEsted operation - OK. No water ingress found on FCP. Au TK 45350