Additional troubleshooting tips and resources here: https://support.enovationcontrols.com...

Note: For indepth detail about the physical layer and termination resistors, we recommend you read Application Report (SLLA270) from Texas Instruments: http://www.ti.com/lit/an/slla270/slla...

Chapters
00:00 Introduction
00:23 What is a CAN Data Bus?
01:00 Components of a Physical CAN Data Bus
01:44 CAN Bus Topology
02:38 CAN Bus Electrical Characteristics
03:07 Oscilloscope View of CAN Bus
04:35 Measuring a CAN Bus with a Multimeter
06:34 The Importance of Termination Resistors
08:16 Troubleshooting Step 1: Verifying Termination Resistors
10:23 Troubleshooting Step 2: CAN Hi & Low Wired Backwards
11:59 Troubleshooting Step 3: CAN Signal Missing
12:54 Troubleshooting Step 4: CAN Signal Shorted
17:54 Conclusion