Near Intersection of I-35 & I-90 Southern Mn. | Very interesting. I was incorrect in my terminology above when I suggested that the CAN Low is negative. It is negative in respect to the 2.5 reference but is actually positive compared to ground. CAN High is positive but more positive than CAN Low. As I mentioned the system uses the difference between the CAN High and CAN low lines to determine if the pulse is valid. |