The Trainer #111: How To Troubleshoot CAN Communication Faults

Motor Age
Motor Age
82,330
52
Published 2021-03-01
Have trouble dealing with those pesky "U" codes? This episode of The Trainer may take some of the pain out of diagnosing "loss of communications" faults.

#canbus #lossofcommunication #ucode #electrical #autohowto

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All Comments (21)
  • @thinkingsmarter3506
    I want to thank you. I have a 2010 explorer with RSC alarm going off and started on resolving it months ago. I purchased the vehicle with the issue. I thought based on YouTube it wa a faulty ABS module. My scan tool was not high tech enough to run most of the test you referenced but you point out in the end go back to the basics, check the fuses. Well low and behold it had a fuse missing.. replaced fuse and so far problem is resolved. πŸ‘ Got to run the drive the full cycle but either way this is a huge step forward. Great video, sincerely thank you.
  • @99andrianmonk
    Excellent video. Your style of explaining what's going on and what or why it is happening is outstanding.
  • @billyyoder8171
    Thank you Pete. Good job. Have a blessed and safe week to you and your family.
  • @edlevated
    New subscriber here, just wanted to thank you for sharing your knowledge with this community. Happy holidays!!!
  • @thehungrymechanic3649
    Plumbers have leaky pipes they say.. Great video! Great info! But I gotta say as a field tech that sure is a lot of steps and hardware to find a blown fuse πŸ˜…. I just bought an Autel ms906ts pro I love it so far. But It don't have that topology feature unfortunately. I'm currently tracking down an intermittent can bus issue on my own personal truck. Stopped by this video to brush up on some diagnosis steps to track it down. I have a good feeling I'll find water intrusion due to a sunroof leak. Just need time away from fixing customer vehicles so I can fix my own πŸ˜…
  • @Joe_1971
    I had a similar problem with my f150..the ac would not work and the guage cluster was acting wacky with lights turning on and off and the needles sweeping. Ended up being a shorted wire running along the wire chase on the drivers side.
  • @HouseCallAutoRepair
    If a fuse blows, there is ALWAYS a reason. Find that reason and accomplish two things... Prevent a come-back and become your customer's hero!
  • @sandymejia1120
    Nice video i check my between 6 and 14 and only have 120 ohm any suggestions i unplug all modules and still 120