3620 - BCU FAULT. TO RECTIFY. ~~~~~ 3620 - BCU FAULT.  3620 Fault code 317 (BCU Trailer back off light) on TIMS. Measured resistance of P3 connector pin E-A (258 kohm) and pin N-P (13.13 Mohm), found no abnormalities. ER showed abnormally high BCP in #3620 and #1620. Swapped BCU between #3620 and #3619 for monitoring. Swapped and replaced BCU between #1620 and #2620. Conducted brake cycle check and found no abnormalities. BCU S/N : (after swapped) #3620 S/N: 15-05-119 (817mm) #3619 S/N: 15-33-240 (805mm) #1620 S/N (old): 15-33-242 (faulty) #1620 S/N (new): 15-33-239 (826mm) #2610 S/N: 15-44-303 (814mm)  Sarma/Sugu/Anand/Alan/Kamal/Lee PT/Shafie 45274