TIMS showed Fire / Smoke Internal at carFDT car. Staff(LVR) checked and confirmed no signs of smoke / fire / burning smell on exterior or interior of train. Tr ain was escorted to terminal station. ~~~~~ 3551 TIMS showed Fire/Smoke Internal. Staff(LVR) confirmed no signs of smoke/fire/burning smell on exterior or interior of train. Train was escorted to terminal station. CE : 3551 Smoke Internal reset.  3551 found FC 720. Replaced SDR2 relay as preventive measures.  Au TK 45352