TC reported that TIMS showed obstacle detected at Read DT car. Changed end at MSP siding, operated t he ODCS but fault light was still illuminated. Train operati ng normally. ~~~~~ Downloaded ER and fault trace on PTU 006. Carried out continuous shake test for #3502 A & B SIDE. Line 7922 TO 7923 shake test reading stable at 0.1 ohm (A/s). Line 7925 to 9154 shake test reading fluctuate 2.1 ohm to O/L (B/S) failed. Rectified obstacle detector loose connection. Conducted continuity shake test, reading stable 0.1 ohms-ok. Checked by Kumar/Jack/Sateesh/Koh. 16/04/20.