TIMS showed Smoke Internal at car 1539.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. TIMS showed Smoke Internal at ca ~~~~~ TIMS showed Smoke Internal at car 1539.   #1539 checked and found no 1 end internal smoke detector sensor dusty. Cleaned with compressed air and checked PCB ok, no signs of rust or water ingressed. Function test ok. Done by: Saini, Morgan, Kumar (28/6/24)