#3645 BCU Trailer back off fault (DT CHE ~~~~~ #3645 BCU Trailer back off fault (DT CHE     #3645 Fault code-317,#2645 fault code-316,114,113. Swap #2645 BCU to #1646.Check #3645-no fault code 317,but #3646 having FC 317(fault transfer).Replace #1646 BCU and test ok.Brake cyclic check BCP-ok.Aux off/Aux/on twice no fault occure.Shunting no fault occurred. #1646-BCU:- New s/n: 1544-287 Old s/n: 1509-156 Not: 2448085 raise. Done by Saini/Yusof/Asruddin. 27/12/22