TIMS showed Smoke Internal at car 1542.Staff(YCK) checked and confirmed no signs of smoke on exteri or or interior of train. Train was escorted to terminal stat ion. TIMS showed Smoke Internal at car 1542. Staff(YCK) chec ~~~~~ TIMS showed Smoke Internal at car 1542.     Check Tims FC-720 Smoke internal #1 happen one times.Further found mushroom side dirty gather alot of dust. Clear dust by using compress air to clean up ok.Fault was unable to duplicate in depot.Function test ok.To be further monitoring in M/L. Done by Rizman/Koh. 22/03/23