TIMS showed Smoke Internal at Rear M1 car. Staff(YCK) checked and confirmed no signs of smoke / fire/ burning smell on exterior or interior of train. Train was escorted to terminal station. ~~~~~ TIMS showed Smoke Internal at Rear M1 ca   Checked previously swapped 3557 FCP with 1557 for smoke internal fault at 3557. Changed out 1557 FCP and tested ok. Conducted smoke test ok. Serviced smoke detector. To be further monitored in ML. S/N: Old 183 S/N new 170 Notif: 2512883 Done by: Sateesh and Alauddin 45144