on the j1939 9 pin diagnostic plug what do i connect the data common to?

Submitted by Mark Overholser on Fri, 2012-10-19 15:06


SilverLeaf Units Do Not support the CAN Common line. When the CAN Bus, which is what J1939 is Based On, was developed for Process Control between Building of a Manufacturing Plant, the different Equipment could have wildly different Electrical Grounds, so a Common Ground was Established.. In a 45' or less in length Coach, the possibility of having Different Grounds is just about impossible, so the Can Common becomes a Moot Point....