2019 Tahoe with a Chassis CAN Bus Issue
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- Опубліковано 5 лип 2024
- I've started doing some shorter videos for TikTok and this was a fun CAN Buss issue very similar the the 2018 Silverado and in this video I do the process of finding the issue with a Scope!
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#autorepair #diagnostics #picoscope #topdon #autodiagnostics #canbus #launch - Авто та транспорт
This is the official channel for GM truck CANBUS problems 😊
lol I get a lot of them.
Being a retired master tech since 2003, it has been really refreshing of your knowledge of systems. I worked for toyota for almost 30 years. l was the guy to go to when cars were going tru lemon law .But your knowledge of the system and the use of tools is really extensive. Thanks for the refreshing curse
Jake man your knowledge of these systems is truly unmatched in most cases. You sail through these complex issues like it’s no problem at all! Thanks for bringing us along as you go about your day to day tasks while running your business as a one man army!
Great diagnostic strategy, Jake! This time you had the scope on 🙂 After culprit identified, easy repair!
Thank you for your systematic approach to addressing the customer's concern. You are doing amazing work. Your simply and humble presentation improved my understanding of high speed and low speed networks.
Very simple and effective way to deal with can network faults lot of good information thank you
What a great video, to the point & clear. Loving the short format.
Yep, totally agree, he’s packing a ton of content and information in a short amount of time!
That was another amazing troubleshooting process. 👊 wish I was able to be that efficient! I’m still practicing and trying to learn.
These videos are great for learning
Thank you for the Data Link Reference page info. I didn’t know about that. Really enjoying your channel. Thank you for all of the time you put into these videos.😎
Well done 👍
I love the snappy format, bravo! Presumably you started thinking it would be a short, so chose vertical format. Then when it was longer than a minute, you decided to change course. I find it harder to pause and zoom in on circuit drawings with vertical format, so here's a vote to keep standard landscape format.
No I filmed it for TikTok and wanted to share it here as well so my UA-cam community doesn’t miss out.
Thanks for sharing the good information 👍👍
Thanks Jake! Appreciate your videos :)
Good work Jake thanks for sharing Amigo
Great job 👍
Nice job
Hey Jake, Im just starting to get into scopes and was wondering if you could do a short video setup where you show us how you setup your USCOPE for CAN network testing. I dont see any another videos on youtube about it so I would greatly appreciate.
Thank you
What great video Matt
Awesome 👌🏽
Enjoyed watching your video. Trying to find the DATA LINK REFERENCE document number you used? Thanks for your time.
This is a gm document and they have used it for a long time. I can't remember the document number but you should be able to search for it and also any module that needs programming if you go to it's removable and install procedure it will be linked there.
Great video and way of breaking down the system and troubleshooting. I always wonder how a terminal can be spread open. I have had that on my own systems and I have not been in there poking around. Can it be just from being plugged in a certain way and then fatigue caused by vibration?
Probably just poor metal not having adequate spring properties. Heat and vibration will fatigue them.
Hey Jake, Great videos. Could you show the whole screen please.
This was filmed in vertical format.
❤❤❤❤
Nice diagnosis. For some reason, testing to find out which direction to go to find out which terminating resister to go toward confuses me. So when you did the test at the EBCM and got 120 ohms and said that the reading was from the air bag module and that the problem was toward the EBCM, what would have been your reading at the EBCM if the problem was toward the air bag module? Thanks.
OL(open loop) or some very high resistance.
@@autodiagyt Ok, thanks Jake.
great diag. what was the other scope you were using. i didnt recognize it
The little one is a AESWave uScope 1 channel. Good for quick ok what does the signal look like. I really could have used it and did the same wiggle test and watched the the signal to clean up but for doing a video a bigger screen is easier for y’all to see.
@@autodiagytnice diag!!!! I have the same question as the subscriber from above: What kind of bigger scope did you use, not the uScope, the other one. Nice channel, appreciate the content, Thanks for taking the time to educate and inform! Ty!
@@YOUZTUBE2000 it’s the topdon scope. You have to have a topdon or launch type scan tool that is compatible with the scope.
@@autodiagyt I bought the uScope a few weeks ago- Love It !!! However the bug has bitten big time, now that I’ve seen the power of scopes, I’m strongly considering a 4-channel- Good luck with the channel and your business- thanks for bringing us along!
That was definitely a great follow up for the last case study. Now showing the ohm meter along with the oscilloscope to track down the source of the problem. Did you have any certain order in tracking down the bad connector, or did you just procede to check the ones that where the easiest to get to first?
Top notch diagnostic Jake! Thank you for all your videos!
Yeah I usually just try in order that the diagram has but if some are easier then others I'll jump around and skip the harder ones and come back to them.
👍👍😊😊
Great video,
This was very informative. I have an older tahoe that started to go into limp mode and would not start very often with the dash guages dropping out and other crazy things. I narrowed it down to the canbus voltage being way to high over 8 volts from can hi or lo to ground. I decided to start unplugging modules and the first one I unplugged was my abs which dropped the 120 oms to 60 but the can bus voltage went down to just over 2.5 on both hi and lo. So I'm like yes this is the issue. It was not. I replaced the abs module and the exact same issue returned when I plugged it in. The abs connector has no issues whatsoever. Unplug abs good and plugged in the vehicle won't start and guage needles won't move from zero.
Any help would be greatly appreciated.
That's because the can bus is linked through modules. If you had a high voltage reading on the bus and unplugged the abs made it go away then you need to keep going down the line on that end of the network.
@@autodiagyt I had the misconception that the canbus was simply paralleled to each module device and was shorted to some power within the abs itself affecting the network. Still learning how these work. But if it's a type of pass through network then this is making way more sense.
@@kickford yes GM pass through each module so if a module is unplugged so is the rest of the network.
That was too quick of a diag. Just kidding, I wish they were all this direct. I like to start in the middle and figure out which direction to go.
Jake. What scanner and scope models are you using? it looks like a topdon to me, but a topdon what?
The scope is Topdon. The scanner I normally use is a Phoenix Smart but I forgot to charge the battery and was using the Launch X431 Pro 3s+
@@autodiagyt Thank you
@@autodiagyt I am struggling with which scope and scan tool to buy. Any suggestions?
@@ericsingleton2047 depends on your budget and what the majority of vehicles are you working on
What oscilloscope did you use?
The little one is the uScope and the other is the Topdon
🤣🤣🤣🤣. now then if you had done that on that last car i would have saved you a bunch of time 🤣🤣🤣 and i bet you normally would have 🤣🤣🤣🤣 awesome job mate and petty dam quick . “show me the money “ 🤣🤣🤣🤣
Crazy I had 2 similar vehicles and basically the same issue and could show the hard way and the easy way to find the problem lol.
what scope brand is that?
The little one is the uScope and the one on the scantool is the Topdon Scope
On the newer gm cars 120 ohms is normal.
I don’t believe that’s correct what vehicle specifically are you referring to?
Saw that on a 21 Silverado. Pins 6 and 14 on dlc go to a gateway now, not the high speed network.had me chasing my tail for a bit until I looked at the schematic.
@@bradleybeaudry8935 yes a gateway vehicle will show 120. That’s where a diagram is important!
m.ua-cam.com/video/q_y2sHIbqD4/v-deo.html
Hey man stop advertising your shit getting for free and try to sell it to beginner mechanic
I’m not quite sure I understand what you mean?
Dear Lord! Leave the guy alone! He’s free to use whatever tool he wants. We all come here to learn. If it’s not your thing, you’re welcome to look elsewhere.
I did not hear him promote or recommend any product. 😑
@@autodiagyt I think he means "stop giving it away and start selling it."