5 Tips For CAN Bus Diagnostics | Mechanic Mindset

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These 5 diagnostic tips will quickly help you identify if you have a CAN Bus network fault. I explain the basic principles of CAN Bus operation and the steps I take to diagnose network problems. Follow these steps which include a function test, OBD diagnostics scan, basic multimeter checks and oscilloscope waveform analysis to help you diagnose CAN Bus faults fast!
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0:00 CAN Bus Diagnostics Explained
0:42 CAN Bus explained with network topology diagram
2:53 How to perform a full CAN Bus function test
5:46 How to identify CAN Bus faults with a scan tool
9:53 How to identify CAN Bus faults with a multimeter
12:36 How to identify CAN Bus faults with an oscilloscope
14:48 How to find and isolate CAN Bus faults
The Mechanic Mindset channel is here to help you improve your automotive diagnostic skills. We upload regular, easy to understand, automotive training and tutorial videos covering topics such as; oscilloscope diagnostics, PicoScope, CAN bus, waveform analysis and much more! Subscribe to stay up to date!

[@seasonedtoker]

This guy went to schooling and mentoring so that we can watch everything explained in comprehensive vids. He should be rewarded

[@MechanicMindset]

Your satisfaction is my reward! Thanks for watching! 👍

[@elregresara412]

@@MechanicMindset. I need to know. What Scanner you used? Thanks

[@cstew8355]

@@MechanicMindsetwhat a guy thank you mate..

[@jamescox9203]

@@elregresara412 watch it again, he named it

[@willspeakman2461]

This is by far the best channel to learn about diagnostics. Most videos are hours long and assume you already know the ideas. These 15 min videos are perfect for people like me just getting into it.

[@MechanicMindset]

This is great feedback, thanks! I do make an effort to keep the videos as short as possible with an emphasis on keeping it simple and to the point. Glad it works for you!

[@fastturbo7150]

This channel is really great one of my top 5 for sure. I signd up to the website. Scanner danner is also amazing im signed up on his site aswell. South main auto is another great channel, but its a little diffrnt style. Sometimes he might show you tips and tricks for suspension or something. Where this channel seems more dedicated to showing how to diagnostic. Was just tryn to share couple other car channels you might wanna check out

[@williamsullivan6984]

Thank you for sharing your knowledge in an easily accessible format. Your videos are easily followed and communicate a wealth of information in a very concise fashion. God Bless You, May You Enjoy Great Health and Happiness.

[@MechanicMindset]

Thanks!

[@xxwookey]

An excellent introduction to CAN bus. Thank you. I shall watch some more of your stuff now as this is all new to me. (I've just skipped forward 25 years in automotive technology, from 1997 - the last year before everything had a computer and a CAN bus.)

[@MechanicMindset]

Great! Hope it all helps 👍

[@ianhenderson4441]

As a taxi-meter installer lots of helpful information ...I fit can bus interface modules ( speed data) mostly every day ...enjoyed the Video👍👍

[@MechanicMindset]

Ah cool, yes good to know these basics if anyone gets it wrong. Cheers!

[@Umski]

A BMW with indicators 😮🤯😂 All useful stuff - thanks 👍

[@sliderdriver1]

Optional extras I thought?..

[@kitcht]

Great vid. Couple of things I learnt. Easy test sing comms test to module to test can connectivity. And the voltage test for high and low can is useful quick test. And using the resistance check. But then using piscoscope to confirm diagnoses using evidence. No guessing! 20 years out of workshop so nice to keep learning and keep hand in. Thanks again.

[@MechanicMindset]

Great to hear you are keeping your hand in the game and continue your learning Tony! What else would you like to see on the channel?

[@1waukesha]

Back again trying to freshen up my Can bus knowledge. Fighting with a Bobcat skid steer loader having electrical gremlins keeping it from powering up. Pretty sure I traced it down to a bad display module! Thanks for the good video!

[@MechanicMindset]

Great job!

[@georgedass5419]

Straight to the point and best knowledge I've ever gathered on can bus systems Diagnosis. Thanks mate

[@MechanicMindset]

Awesome, hope it helps! I like to keep it simple 👌 Thanks for watching !

[@georgedass5419]

Thanks to you, all the way from Kenya. Good educative content

[@GerardBurkeBurkesGarage]

Nice work mate, I enjoyed the video. Congrats on 10k subs 🎉🎉 Well deserved!

[@MechanicMindset]

Cheers Gerard! Glad you enjoyed it. Yeah 10k!! Crazy. Thanks man. Hope you’re good

[@dominictomasi9247]

Excellent videos! Especially for those with less experience with CAN bus networks like me. I do have a suggestion that might help many of us novices. Can you make a detailed video of what pins on the module harness to tap into with a scope or multimeter to diagnose or test a CAN bus network on say the KGM module on a E series bmw?

[@MechanicMindset]

Hi Dominic, thanks for the feedback and glad you are enjoying the channel! That’s quite specific 😅. I think it is best to start with the wiring diagram. That’s what I would have to do to make the video. 👍

[@user-zm4eb9xp3v]

This is a very detailed video. Thank you and keep up the amazing work!

[@MechanicMindset]

Glad you enjoyed the video!

[@kaneki-kun9500]

Brother im an Student from Germany, i swear i learn about Can-bus since 5 Year and ABSOLUTLY EVERY TEACHER thinks we are high inteligent beings, the way they try to explain But you did it for monkeys like us the right way

[@MechanicMindset]

Haha, it doesn’t need be complicated most of the time. Thanks!

[@remotaurog]

Having fun learning CAn Bus , difficult to figure out those IDs but i did see some using wireshark .

[@MechanicMindset]

@@remotaurog Not used that! Will have to take a look 👍

[@jordysandino6577]

Hello sir . Thank you so much for taking your time helping us out with this type of class. I’m been repairing cars and never heard this terms I’m learning a lot with you and I will like to learn more I’m very anxious for it . I appreciate you

[@MechanicMindset]

Great to hear you are enjoying the learning. If you want to take the learning to the next level, you should definitely check out the Membership on MechanicMindset.com there is a free access to so you can try it out 👍

[@PatrykRElektronika]

Wow, I'm so impressed. You wouldn't believe how many hundred times I had to explain all of that to the mechanic who wants to send me the instrument cluster for a repair due to ie. ABS fault on the cluster but the "diagnostic machine" doesn't say that ABS is faulty, so it must be the instrument cluster. Or because Google says that. From now on I'll be sharing that video with them :) Just for your information, or rather clarification as I assume you know that- it's not LOW SPEED CAN which doesn't use the termination and has a different voltages, it's the FAULT TOLERANT CAN (FT) characteristic. FT CAN is used in BMW @ 100kbit/s, FERRARI @ 50kbit/s, MB @ 125kbit/s and the "STANDARD" CAN which can go as slow as 40kbit/s is also used with the same speeds of 125kbit/s ie in FORD, JAGUAR, LAND ROVER. It's the same speed as FT CAN on this BMW.

[@MechanicMindset]

Haha, send them my way for some learning 😁 Ah ok yes, got you. I associate the trend of slow CAN not using the 120 terminal resistors (being able to run single wire mode). I’m familiar with the a high and medium speeds that do use them. That’s how we’ve been led to teach it with the manufacturer. Think the important lesson; if you have terminating resistors, there are more opportunities for problems 👍 cheers

[@Lambros_Stefaneas]

Amazing video. Very Very good informations.one more video from you,that I learned something more. Well done. Waiting your next, to learn more. Thanks.

[@MechanicMindset]

Great to hear! What was the main thing you learnt today? Thanks 👍

[@faroukkhan6777]

Excellent sir great teacher,, keep up with your great work 👌

[@stephanevaucelles6378]

Hello and thank you for this video

[@MechanicMindset]

You’re welcome Stephane!

[@jovanthompson9669]

Hey really good video thanks for sharing , but In a case where I would have to start disconnecting modules , instead … would removing the fuse for that particular module be better ?

[@MechanicMindset]

Great question! Unfortunately no; we disconnect the modules to eliminate possible wire faults, caused internally in the module ie short circuit etc

[@tech.automobilemaster.1017]

Good information guys about topology networks. ❤❤.👍👍........

[@shawnm2597]

Agreed, simple computer diags, check hardware first.

I've used the multiecuscan system on our citroen relay to find the engine faults and fixed all the asdociated problems. Now when I rescan there are no engine fault codes but its pulled up a Body U 1602 CAN line error code but theres not engine light come on. Ive tried searching for a fix on this but its proving harder than I thought. I know its a bit cheeky , but would you have any idea where I need to start checking and or looking at. Some people say to ignore it if theres no engine light coming on .

[@flymoracer]

Great video. I had a very similar fault on a Mini Cooper S. ABS module DTCs, Christmas tree lights on, wipers going etc. Even the sun roof wouldn’t work. From memory I think we also had ‘voltage low’ errors. Turned out to be a faulty fuse box module. Had to replace and program the new module to fix the problem. We changed the ABS module a couple of times first but that was a red herring.

[@MechanicMindset]

Thanks for sharing! Got there in the end 👍

[@flymoracer]

@@MechanicMindset I had a related question if that’s ok. I don’t think I’ve ever seen anyone on KZbin attempt to communicate with a single module in isolation to the rest of the network, e.g. testing communication of say an ABS module on the bench by giving it power, ground and scoping the CAN pins. Is that possible to do?

[@MechanicMindset]

@@flymoracer It should be. You’ll need to make sure you power all the correct pins (ie T15 wake up for some modules)

[@johnfrancis9668]

very good explanation ❤

[@jmc6940]

Your a great teacher, vary enjoyable listen to.

[@MechanicMindset]

Thanks for the kind words! Appreciate it, great to have you on the channel 👍

[@giopirmisashvili5514]

Thank you

[@vicky-nc3to]

Well explained sir, your channel is unique,.. Please keep the videos uploading, we are following....

[@MechanicMindset]

Thanks, i hope it helps! Lots more to come - just need to find the time! Cheers

[@MiracleMAX]

Great video and explanation Darren! I'll be using this one in class! 😉😁

[@MechanicMindset]

Awesome, I hope it helps them! Very important to keep it simple! Cheers

[@MiracleMAX]

@@MechanicMindset Too true mate. Keep up the good work!

[@padraiggalvin2807]

good point about the scan tools

[@MechanicMindset]

I will follow up on this at some point 👍

[@robertmobileman8304]

great content as always , i will check those waveforms out thanks, information is key in modern cars for sure , thanks Matt

[@MechanicMindset]

Glad you enjoyed it. Yes need to keep up to date, but remember to keep it simple too! Cheers Darren

[@Winstonzm]

My 2008 328i runs and drives fines. But I can't get any scanner to communicate to the dme via the obd port. I see the dme runs up pass the ibs to the obd port. And notice both the obd and ibs is the same Grey color in the model you showed. Would a bad ibs interfare with the scanner trying to talk to the dme from the obd port?

[@MechanicMindset]

Hi, can you communicate to all the other modules?

[@Winstonzm]

@@MechanicMindset Wow thanks for the crazy fast reply. I have just the most basic obd scanner. I can confirm it worked on the car prior to this problem. And can confirm the scanner works on other cars. When I plug it into the e90 is says "no obd ll response" so I can't access anything through the scanner. Thats Lead me to checking all the fuses which were good. Then checking the compartment in the engine bay where the dme is housed. No signs of water damaged check the connectors and everything looked good. Disconnected the connectors going into the jbe junction box one by one. Same no luck. Disconnected abs module same thing. Should I just continue trying to unplug modules to see if thats what's holding up the com line?

[@MechanicMindset]

@@Winstonzm So there are just 2 wires to the gateway (JBE I think) for diagnostics. Pin 6 & 14 on obd socket. Some people mess with these wires to prevent theft so I would start checking everything is ok at the obd. If it starts and runs, the whole CAN network is probably ok.

[@Tw8glet]

What a great sight and great teacher your a credit We’re are the download links hidden

[@MechanicMindset]

Hi, the link is just below the first paragraph in the description. Tap your email in and you’ll get the link. Thanks for the feedback! Great to have you on the channel!

[@ddsajev]

Your videos are really educative & on point. Thank you for your time & efforts. Please explain, that i am trying to connect to CAN bus via OBD to a JDM toyota navigation. Are the OBD & junction connector CAN are same or different.

[@MechanicMindset]

Thanks for the feedback! Sorry, not sure, I am not so close to Japanese automotive

[@jameshall2299]

I have a ram 1500 not communicating with tpms module. Checked resistance and have 60 ohms between high to low, 2.6v high to ground 2.4 low to ground, but, I have .54 volts between can high and can low. Can I have a short on one of the two 120 ohm resistors? This vehicles wiring has been tampered with.

[@linuxmonkey]

Bruv... I didn't expect that ending. 😂😂😂 Damn. Why the heck is this so entertaining? I'm a software engineer not mechanic lol.

[@MechanicMindset]

Haha! It means we’re doing KZbin right 😆 Glad you enjoyed the video!

[@chrisczarnik3439]

Great video, 👍👍👍👍from 🇦🇺

[@wilsonwichman4847]

My question is what should I do If I get no voltage right out of the pcm for either can bus high or can bus low?

[@1waukesha]

Awesome video. Thanks !

[@tomasagustinsanchez7197]

Hello! I have a really tricky one.. I currently repaired the FRM and it fixed all the electrical problems but my windows switch is still not working. I can move the mirrors but I can’t operate the windows. It’s saying that I have a Lin Bus communication problem. Would that be a cable? Please please help me

[@iankelly2110]

Enjoyed that Darren great explanation

[@MechanicMindset]

Great to hear! I hope it helps. Cheers!

[@cck1496]

Very good video.....But there is no basic video about CAN on your channel? Can you kindly make please about "what is CAN and how it works?" Thanks.

[@petarsavic6447]

Just one mention. Week ago had a Porsche Macan in my shop, it throw communication codes all over modules. Couldn't communicate with pasm module. I disconnected it, thinking it was disturbing the can network, but nothing changed couse it was steering rack electronics making problems and blocking pasm module communcation. Strangly I COULD communicate with the steering rack :)

[@MechanicMindset]

Interesting! Did steering rack only have one network connected? Some have 2

[@petarsavic6447]

@@MechanicMindset haven't had a topology or that info, all I know that it was two can wires with another 12v wire on steering electronics. When unppluged everything goes back normal, plugged- no pasm module in the list on autel, no communication with it, but steering electronics I could communicate and read codes etc. 😂

[@GaryTaylorvw]

Hi the image you’ve got for your bmw canbus network layout, where did you get that from please? I’m wanting to find one for audi a3 8p sport back 3.2 vr6 2006/7 as I’ve cut some twisted cables and didn’t realise they were for canbus, new to engine swaps so was a stupid mistake, I’ve stripped all the table off and I’ve got traced them back to modules / plugs etc just need to know what goes to what so I can splice them, if you can help I’d really appreciate it Can-bus cut items Ecu body plug ABS module Airbag module Headlight level module 8P0 907 357 F Steering wheel module 8P0 953 549 F Console/dsg shifter Dsg trans plug Rear diff / haldrex plug diff side CANBUS gateway module plug 10 pin 1K0 907 530G Top side plug tab 6 from left red / brown 6 from left red / black Find what grey / yellow wire goes to on instrument cluster, as that has a cut canbus wire 10 sets cut in total

[@MechanicMindset]

You’ll be better looking for a wiring diagram. Try Carmin mobile app, it’s free 👍

[@woodybear8298]

How do you know what the abbreviations in the schematic mean? The initials in the boxes don't even make any sense. For instance, how does "Kombi' translate into 'instrument cluster'?

[@MechanicMindset]

German 😆

[@ChupoCro]

I have almost identical problem with Vectra C 2.0 2002 (ABS and some other lights on but ABS is still working, can't use turn signals, horn and full beam headlights) but after 20 to 40 minutes of driving (when something worms up or dries) everything starts working well. When I start the engine then RPM and speed indicators drop to zero for a moment exactly every 45 seconds and when that happens 4 times then the RPM and speed indicators stay at zero and the warning lights turn on. After turning the engine off and back on everything repeats again and for the next 4 x 45 seconds everything works well. I removed the CIM and cleaned all the connectors but still the same. When the warning lights are on the error reported by OPCOM is "No communication with CIM". I removed and cleaned UEC, all fuses and some other connectors and added another battery negative to chassis wire but still couldn't find what is causing the problem. The same problem on many Vectra B 1.6i cars could be solved by just removing the cabin light bulb.

[@MechanicMindset]

The cabin light bulb 😆. Would be interesting to know more about that fault! What does the CAN waveform look like on the scope when you have a fault?

[@shorn77777]

could anyone tellme what is the basic model of autel or launch i can check the k bus and its modules (communication). should i get bi direct. or any basic model will do mine is e46 convertible. after rain it has some issues,

[@wesleysrianekkul8178]

Awesome video. Probably one of the most technical and informative channels on KZbin! Thank you for the information. If I may ask what was your technical background? Dealership technician, college/tech school instructor?

[@MechanicMindset]

Glad you enjoyed the video. I’ve been through the mill 😂 BMW Apprenticeship > Senior Tech > Workshop Control > Audi Tech Trainer > Global Train the Trainer > Course Author > Managing a team of authors > Mechanic Mindset 💪

[@davidpaterson6318]

@@MechanicMindset Could you do these in French?

[@MechanicMindset]

@@davidpaterson6318 Subtitles?

[@davidpaterson6318]

@@MechanicMindset Hi, Not really ideal! As the French distributor for PicoScope, I'm trying to organise something similar, since there is a big demand for just this type of video here in France. Although I speak French, and can translate into French, French is not my mother tongue. I think it is important that the voice is French. I'm not keen on subtitles for this type of video.

[@MechanicMindset]

@@davidpaterson6318 OK thanks for the feedback. No plans in the near future as voice over translation can be tricky to get right. I would also have to set up a separate channel (which isn’t impossible, but maybe in the future).

[@LMAutoRepairs]

Very well presented... 👍👍👍

[@MechanicMindset]

Cheers Luis!

[@franktran3967]

Hi everybody, I have a Honda civic 2010 coupe is false error link when I setup ODB2 scan then I probed CAN-H and CAN-L look ok but L-line is a straight line 9 volt dc, it has no wave form during ignition is on or engine is running. I am not sure what it should look like before I continue to chase it down to find the problem. Anyone has any suggestion please!!! thank you every much. I don't want to bring it to the shop or dealer because the value of my car might be cheaper than the cost to repair.

[@sara78130]

Thanks best

[@jackspratt4343]

Hi, does all CAN BUS communication go through the main engine ECU, or a central ECU ? Or, can susbsytems communicate among themselves without the main ECU being involved ? Thanks,.

[@MechanicMindset]

Great question! CAN is considered a multi master network; each module communicates when it wants. There is an arbitration strategy to sort priority when there is a clash. There is also a gateway but this just connects the different networks, like a translator. The gateway can be combined in another module or be separate

[@jugnu361]

I LIKE UR HAIR CUT..............I HAVE SAME HAIR CUT......

[@MechanicMindset]

@@jugnu361 🤣 It will never go out of fashion 👊

[@vicky-nc3to]

I have been following topology of CAN . It is similar to the schematic used in video. There are seprate branch for powertrain, crash, comfort etc. Now what i find that each of this branch has sperate terminating resistor. I found that 1 resistor(120ohm)is always in gateway & other is in other control unit ( it could be any control unit in branch) . Is it possible that all branches using 1 common resistor in gateway. Or i am in wrong track ? Thankyou

[@MechanicMindset]

I think it will be separate. Otherwise all networks will be connected and it would t work 👍

[@vicky-nc3to]

@MechanicMindset hmm... possibly gateway has multiple resistor for each branch 🤔..

[@talaueconstante830]

Can bus is simple if you understand it

[@alrifainidal]

Great video Mate . keep the good work

[@MechanicMindset]

Glad you enjoyed it Nidal!

[@yassin9749]

Great Video Sir, Keep the great work thank you ...

[@MechanicMindset]

Thanks, more to come!

[@vladmarius2404]

Your videos are amazing! Very clearly explained. I do have a curiosity though: what could happen if the 12V radio supply wire touches the CAN-low wire? (the wires are located right next to each other in the quad-lock connector). I've done this on my bmw E60, by mistake, while installing a bluetooth module, and i'm not sure if something gone wrong with the can network/modules. Also, how can i test if everything is alright? I've noticed that everytime i'm turning on the ignition, it activates the fuel pump for 20 seconds...it wasn't doing that before touching these wires together. Many thanks!

[@MechanicMindset]

Glad you enjoy the videos! The network in the radio shouldn’t have any effect on the fuel pump; different network. The 12v short on CAN will not have damaged anything. I do it all the time in training. I’m fact, if it is low speed CAN, that network will still operate as normal! As long as you can communicate with things, network is ok. Re the fuel pump, I can’t remember the pump running for 20 seconds, but if you have a power train network problem, I think the pump will run continuously

[@vladmarius2404]

@@MechanicMindset Wow, such a nice and fast answer. Thanks a lot! I'm going to share your channel with some of my friends that share the same passion.

[@mvnnyss3774]

Hello! I have CAN Bus communication error on my abs which is causing service power steering to pop up when I’m driving for a while. Abs , brake, and tc lights come on and goes away after about 5-10 minutes of the car being off. Any suggestions?? 2015 Camaro SS 🫣

[@MechanicMindset]

Oh dear! I would try and confirm what type of fault you have (short or open etc) and then try and replicate it. Then you need to isolate the problem (ie is it module or is it wiring) wishing you all the best!

[@kemronsmall4172]

Good video, love the suspense 👌🏼👌🏼

[@MechanicMindset]

Such a small fault, big problems!

[@fourbrothersentertainment1372]

Hi, I have 2008 e60 535i with the jb4. Do you know if it causes no communication issues with the dme? When bmw dealership tried to connect their scanner they said they can not communicate with any modules. I even brought it to a local garage which they showed me that ista+ with Dan was not able to communicate with any as well. If the jb4 is interfering with the communication to the me how can new modules, battery or keys be programmed? Your assistant will be greatly appreciated.

[@richardnilsen8950]

Dealer said no comm with the dme the dealer should have charged you for diagnostics time and gave you a written receipt explaining why and how much to get comms back to continue further diag work.🇺🇸

[@michaelwhelan564]

I can clearly see that this is a great video, but is there a video that answers the question "What is a can bus and why is it needed". My old lotus has indicators and no can bus in sight.

[@corneleones]

You could lift the wipers from the windshield!

[@tyeautube]

Hello sir, I am in Cambodia, my bmw x5 2007 has no sound. radio, ccc is working normal, but no radio sound nor warning tone. Could you please advise from which point I should make the troubleshot. Thank you!

[@mattmarshall7666]

Nice video like always . Did you find the reason for the blown abs fuse

[@MechanicMindset]

Glad you enjoyed the video! It was a plant, I did it on purpose to show you how a simple fuse can cause CAN network problems 👍

[@coycarlson4979]

REALLY - Does EVERYTHING on modern vehicles need to be computer controlled 🤔😒 ?. In my opinion, it is Rediculous that wiper blades and all the other issue displayed in this video can be tied to / caused by problems from the ABS - You are VERY KNOWLEDGEABLE - on locating CAN bus faults , thank you for sharing your knowledge - GREAT VIDEO , and your instruction to ALWAYS start with powers and grounds when encountering a CAN bus fault - is 👍👍✌️🙂

[@MechanicMindset]

That’s right, keep it simple! Thanks 👍

[@jeremyhahn5593]

I've been having problems with my medium can bus on my 2013 jaguar xj the whole infotainment system is not working I am a mechanic but im clueless to this would you possibly walk me through diagnosing a module my multimeter is quite complex

[@CarsExposed]

Great explanation as always Darren 👍🍻

[@MechanicMindset]

Cheer Igor, hope it helps!

[@markg6jvy135]

Full of info your videos 👍👏👏

[@MechanicMindset]

I hope they help! Thanks

[@elregresara412]

Amigo how are you is you scanner Autel Ultra?

[@MechanicMindset]

This tool is a Ancel FX9000. It’s launch based but older software. ThinkCar make a great tool with topology. Autel Ultra is probably top choice for that type of tool

[@diyuser3446]

Thank you for your work. Can you please tell us where to find more info about network topology for BMWs, wiring diagrams? Basic can bus network topology is available but termination resistors placement I knew from your video. Where we can get more specific info. Whatever I found was more confusing than explaining. Thank you.

[@AN77]

Thanks, Great video. After you have lokking at the wave forms of the can-bus, you was knowing that the canbus system was OK? Than you know that the problem would be the abs-module itself, the power/ground to the abs-module, or the can-connection(cables or connectors) to the abs-module?

[@MechanicMindset]

Yes correct. Also the fact that the other modules are communicating on the scan tool, and the function test 👍 Thanks

[@Mohamed-jn4yr]

tks a lot 🙏

[@MechanicMindset]

Glad you enjoyed the video!

[@automatedmwanza]

helllooo Darren need your help about wiring diagram

[@user-tt9bs3yl9h]

I need face-to-face class

[@saibabupodala6297]

Very good video enjoyed

[@MechanicMindset]

Great to hear, have you had many CAN faults to diagnose? thanks for watching!

[@CANDiagnostic]

Great video buddy well done!

[@MechanicMindset]

Cheers Nuffz!

[@AhmedAli-hu8ng]

Hello sir ihave one question wich module is can gateway in BMW's

[@MechanicMindset]

Depends on the model. This is JBE

[@mohammedarshad2757]

Hi how are you sir thank

[@omaromartt]

Please translatet شكرا جزيلا فيديوهاتك التعليمية، لغتي الانجليزية ضعيفة جدا ومن ذلك افهم بحدود 70-80٪ من الكلام رائع جدا جدا جدا حبذا لو يكون هناك قناة ولو مدفوعة بشكل مقبول لتعليم Canbus للاجانب مراعيا صعوبة اللغة عليهم

[@briantek1986]

Can i request a topic no communication line in dlc please thank you

[@manfredgarthoff1409]

I like this video. good explication of diagnistic. But one question i have. When i disconnect one module for to see the error is still there or not, i have to disconnect the battery first or turn off the ignition? or can i disconnect this during date transfer at the bus? Thank you

[@MechanicMindset]

Ideally, turn off the ignition first. I disconnect modules with the ignition on sometimes for training and haven’t damaged anything yet; but best turn ign off 👍

[@manfredgarthoff1409]

@@MechanicMindset thank you for the quick response 💪

[@gajahlampung5674]

niceee videos sir....sir i'm from indonesia can you help me..i have cls 55amg ... with scanner i only detech tcm modul what's wrong with my car sir??

[@alinduta5398]

hi what is the third chanel on pico doing?

[@MechanicMindset]

Hi, great question, it is AWG. Waveform Generator. You can create output signal from Pico but the voltage is too low for automotive use

[@JohnSmith-ok9sn]

How did you come to the conclusion that CAN network is OK on that car, at 9 min 35 sec of the video? You just, kinda, said it, but did not explain HOW you had arrived there? What was your thought process? Perhaps, I missed something?.. Please, elaborate.

[@MechanicMindset]

The scan tool got the fault codes from all the modules (except ABS). We localised the issue to ABS, not complete network failure

[@karollukaszuk3784]

Cool 😊

[@prestontrager3339]

I love electronics! Problem: Car does not turn on due to communication issue (ACC not being engaged) Car: 2007 Mini Cooper S (r56) What I know: Terminal 15 is not communicating with the CAS which is then not engaging ACC (I think its the K BUS) I know Its a communication error I just cant figure out where/what CAN All lights work (everything works that does not require the FOB (again... Issue with ACC not being engaged)) CAS, DME, Key have bean replaced by me, also reprogrammed (not by me, that would not turn out well) Just a 16 year old trying to figure this damn thing out :) Please let me know if you have some sort of experience with this Thanks!

[@MechanicMindset]

Hi, there is a T15 wake up wire that goes around a few modules. Might be worth checking that if modules aren’t waking up 👍

[@JeanFrancisD]

Hi Mechanic Mindset, Great videos, I'm trying to diagnose a lost communication problem over CAN Bus in a Chrysler product and you've helped me understand a lot better how CAN bus networks works. I tested the network today with an oscilloscope and I wasn't able to se any interference in the messages. I was worried about some big spike at the end of messages (up to 5V in can high and down to 0 in can low) But seeing this video I see that you have similar spikes in voltage. Is that normal? since you don't seem to mind them I'm guessing theses are normal? Also the network doesn't have a terminal resistance of 60 Ohm like its supposed to, I get 40.7 Ohm instead. I'm currently trying to isolate the module that does that but I didn't have any luck with the oscilloscope, everything looks normal. My problem is also intermittent, the Jeep can drive fine for hours until every module freaks up in the dash. Thanks!

[@MechanicMindset]

Hi, yes the spike at the start of the message is normal. I’ve not come across 40ohms before, but look in the common modules that all models have (ie engine, ABS) The scope will be a good tool to capture the intermittent fault. Just test in a long time base and zoom after the fault happens to see what it is 👍

[@JeanFrancisD]

Thanks for your awnser. I just found that an aftermarket device that I installed in the Jeep to bypass a security module in 2018+ Fiat/Chrysler products to be able to plug diagnostic tool made it drop to 40.7 Ohm. When I remove the security bypass the network goes back to 59.6 Ohm. This device was installed after my CANBus problem started (trying to diagnose it), At least I can rule this out of my symptoms.. Next step is most likely to go drive it with the oscilloscope and try to catch it when it happens!

[@BOPotstill]

@@JeanFrancisD Likely the bypass had its own internal terminating resistor thus dropping the CAN resistance to your observed 40 ohms. Not really a problem, but it can happen even in certain OEM applications where the manufacturer installs 2 terminators and uses another component that has an internal terminator as well.

[@sebczajna700]

Great video👍 3 ohms resistance between can line or Can/ground?

[@MechanicMindset]

Check this video out: kzbin.info/www/bejne/gIGoZWV-iK-rd80 That was CAN High and CAN Low short together 👍 cheers!

[@ADE2366]

Any indicator faults on the Beemer ? 😂😉👍🏼

[@MechanicMindset]

They’re ok on mine, I got the optional extra fitted 🤣

[@michaelrollins3979]

Love your videos man! Quick question- @around 14 mins you use the scope to check can- you refer to low speed can and high speed can but the scope shows the blue and the red reflecting each other on both, I’m assuming you’re just checking between obd 6 and 14 on both? Or are you doing 6 and a body ground for low and then 14 and body ground for high? I’m new to scopes. Thanks!

[@michaelrollins3979]

Nevermind, just pressed play and saw that you said you have 2 videos on it with more details lol thanks!

[@MechanicMindset]

@@michaelrollins3979 No worries, glad you enjoy the videos. Let me know if you have any questions after watching the other videos 👍

[@heetsolvex2237]

Hey great information. I am seeing traction control and abs warning lights.As per your video on CAN bus network i have checked CAN bus resitance. I am seeing 120 Ohm resistance in CAN bus in OBD connector, but in ABS connector CAN bus resistance shows 60 ohms. Can you help me out it ?

[@MechanicMindset]

Sounds like you are check 2 different networks that aren’t connected. Best refer to wiring diagrams. Can you communicate with everything on scan tool?

[@RtChauhan.uk1141]

What is hateway How check to gateway

[@jen318]

There needs to be a better development in tools or scanners . This reminds me of the old computers it needs to be simpler and more precise its 2024 not 1940

[@kenken-sr2vq]

Whats the yearly fee?

[@MechanicMindset]

$100 (get 2 months free 👍) www.mechanicmindset.com/diagnostic-coach

[@ErikTheVikingMechanic]

Indicators on a BMW are optional extra. Not all BMW's have it lol

[@MechanicMindset]

Haha! Yes, remember to check the option is fitted!!

[@andrzejtajchman2372]

Fucking amazing content, well ilustrated and perfetctly explained. Im gonna make some juicy $$$ thanks to your channel :)

[@MechanicMindset]

Awesome! Cheers

[@rotoboravtov4354]

There's no way we can't come up with a design where l removing abs fuse won't cause faults elsewhere. This is just bad

[@shifty2755]

You shouldn't call yourself a mechanic. You are way better than a mechanic.

[@MechanicMindset]

😁 Thanks for the compliment!

[@chrisczarnik3439]

Far out, some car BMW.

[@MechanicMindset]

Euro cars in general 😂

[@hottorchbeats4739]

BMW is Over engineered . They attract people that are looking for features, like who the fck need head light wipers.