TC reported TIMS showedobstacle detected at rear DT car. Staff(BGB) and staff(CBR) checked and con firmed no abnormalities at the rear DT car. TC feedback TIMSstill showing obstacle detected at rear DT car. ~~~~~ 3557 TC reported TIMS showed  obstacle detected at rear DT(3558) car. Staff(BGB) and staff(CBR) checked and confirmed no abnormalities at the rear DT car. TC feedback TIMS still showing obstacle detected at rear DT car(3558).  Check and found 3558 B side obstacle detector wire broken. Re-lug the wire and function tested ok. Obstacle detector height failed (39mm). Re-adjusted to 53mm. Limited movement and depot shunting ok with no fault recurrence. Done by: Sanip/Jack 45199