TIMS showed Smoke Internal at Rear DT car. Staff(AMK) 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 DT ca   Checked smoke detector unit and found smoke sensor dusty, cleaned up and function test ok. Done by: Koh, Sanip (31.8.23)