How to test a CAN bus network with a meter

MR. DIAGNOSTECH
MR. DIAGNOSTECH
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Published 2019-10-20
CAN network explained. A CAN Bus can fail in different ways and can cause a no communication with the scanner, in some cases it can cause a vehicle not to start. Here are different test you can perform using only a multimeter. You can perform a voltage test to see if the Can bus is active or shorted. You can use a resistance test to check the terminating resistors and to check if the network is shorted. Check out the bect video to know how to test the CAN bus with an oscilloscope.
All Comments (21)
  • @AndrewLoo-dp9tw
    hands down the best videos on networking. I'm getting close to 10 volts on Hi and Lo lines... still figuring it out... Thanks for the video Great work
  • @hammerhead6537
    You managed to do something that very few people have the ability to do, and that is, explain the Canbus System in a very simple and clear way. Excellent!
  • @sollykhan2385
    'CAN' anyone ever get their heads round why there are near Half a Million Views,and yet just a few who bothered to post a comment of appreciation with Gratitude, Thank you for an AWESOME video, no nonsense straight to the heart of the matter,Simple systematic and well thought out methodical tutorial, Legend. 🙂😇 Please post more.
  • @stepawa
    Excellent tutorial explained in an easy to understand way. Thank you sir 👍
  • @quicklooksentertainment3217
    Simple and Right to the point with "Applicational Scenarios." Best teachers are those that understand how to deliver the message to the student. You are one of them. Thank you for making this video.
  • @ericbaker9688
    This is the best way of explaining Can bus system. Instead of dudes jumping on videos and talking in Mechanic terms that's confusing and long. Trying to explain how their fancy equipment work and what it does with out breaking it down like this dude. I must've seen a thousand print outs on here explaining wiring at what goes to where. It means nothing if you can't understand it or what's what. And most don't bother telling us there's a network involved. Proper breakdown here!
  • @Barryd57
    This was sooooooooo helpful. I bot a $30 breakout box and determined that my CAN network was working by repeating all of the tests demonstrated in this video. I connected my $20 DTC code reader to the breakout box and it reported that it could not connect to the HVAC module. Via this process, I avoided hours at the dealer $165 per hour.
  • @kevinnguyene3890
    Thank you for sharing this video. Your the best teacher I have seen on youtube!!!!!!!
  • @javedmushtaq3099
    Brilliant. Thank you for your in depth explanation and fault finding walk through. The BEST and simplest video in relation to this. God bless you my son. 🙏
  • @ronenhuri5824
    I think I never saw such a high level of YouTube lesson of a car diagnostic explanation... shapo
  • @Keepitreal260
    You are by far the best person on here to explain in one video I couldn’t find in a collection of videos just to sum this up. Thank you!
  • @lamtran915
    This is by far the best video to explain such complex system in the most simplified way I've seen. You've saved me from a huge headache. Thank you!
  • @l3yonk408
    Very nice and clear explanation. Thank you, my brother. I have never heard such an explanation before. I salute you deserve applause 👏
  • @AbstractSurrealist
    this is one of the best and simplest lessons on CAN bus network problem i have ever watched. Good job sir
  • @louiscairo6172
    I was having a network issue on a vehicle in my shop and needed this refresher course. I was able to quickly diagnose the issue because of your video. Well done..thank you sir