Finding can lines

[fuzz1]

Hi
It's probably been asked before but i couldn't find any answer.

How do you determine the can lines on an ECU?

Thank you

[wodorof]

mostly by looking for pinout for specific ecu or schematic, almost always CAN is twisted pair of thin wires

[fuzz1]

Hi
Thanks for your reply. Yes makes sense twisted pair cause they data carrying cables. However that would be fine if we have access to the car. What about a way if possible of finding can lines just having the module without the car.

[PSAcars]

Hello to all. If you are working on board ( pcb ) you can look for 8pin ic ( in most cases ) can bus driver. Or ferrite filter for can lines, or both of them near one to other.