TIMS showed Smoke Internal at car 1558.Staff(BGB) 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 1558.  Checked and found smoke sensor dirty. Changed out and function test ok. S/N:   Notification to csc: 2529221 Done by:Rizman/Sanip/Koh 45202