3652 - BCU COMM FAULT DURING DT CHECK ~~~~~ 3652 - BCU COMM FAULT DURING DT CHECK.  3652 FC 301 & 307 on TIMS. ER showed no BCP abnormalities. Checked CN plug connection and found no looseness. Swapped and replaced BCU between #3652 & #1652. Replaced #1652 with new BCU. Performed brake test and found no abnormalities.  Anand/Sugu/Shafie/Alan 45120 BCU S/N : (after swapped) #3652 S/N : 14-39-049 #1652 S/N : 15-05-126 #1652 S/N : 15-05-150 (NEW)