Explained! CAN BUS Diagnosis - How to Troubleshoot Faults.

[@Ecutestinglimited]

👨‍🔧 Ruled out a CAN Bus fault and suspect a faulty control module?🤔Get it re-built here➡link.ecutesting.com/HSCPI 🔗

[@gtrskyline19]

Im a mechanic, in Western Australia, where or what programs do you use to get your wiring schematics

[@rolandangelmardkibouilou7032]

All my congratulation because your videos are very educative for technicians

[@jamesreed7358]

I'm 68 years old. I've been renting since I was 15. Got my mechanic's license when I was 22. I was a long time ago. I listened to a lot of these videos as a refresher and find them interesting. Many of them are just so well done, but I have to say I wish it would leave the darned music out of them. I think if you're serious about the content, it's completely unnecessary. Anyway, this is another very well done one I think. Appreciate them posting it

[@Ecutestinglimited]

Hi James, we appreciate your feedback. Thank you for leaving a comment and we hope you found the video useful!

[@marksteven3534]

Yes this was a very good video and thank you for that but the music is often distracting and I would prefer it not be included.

[@aldairvivas3845]

You can tell you're sixty-eight years old with your b*tching.

[@teewizz6089]

I’m 66 mech. since 1975, if you don’t like the music turn it down and put the closed captions on. I think the videos are great and the maker gets to choose.

[@johnanderson3917]

@@Ecutestinglimited for those of us with hearing loss, the music is a problem

[@BitSmythe]

This is really just *BASIC* electronics for tracking opens & shorts. But it is SO well applied, it’s remarkably useful. Thanks!

[@benji1990x]

Absolutely flawless 18 years I've been a mechanic and now I'm trying to get into diagnostics and electrics this video has blown me away always been scared of getting into canbus to find faults the way you've put this across step by step is amazing I actually understood it which is hard for me as I'm more of a practical learner subbed 😊

[@Ecutestinglimited]

Hi. Thank you so much, we're glad you found the video useful! Hopefully CAN Bus is a little less scary now 👍

[@sollykhan2385]

You're not alone, there are countless 'Mechanics' who get hysterical at the thought of a complex topic, fear of an unknown entity can be daunting. newer technology is a never ending journey of learning.🙂

[@daliborsacaric5258]

This is they way how a technition see the world, we know that most failures are some soldering points, the manual check shown in the video is to show you and understand that these black boxes arent black, you need just another point of view..

[@robindabank4089]

18 years and you are just now getting into diag ?

[@projectsspecial9224]

​@robindabank4089 Not everyone who works in the same field perform CAN or OBD disgnostics which can be complicated at times because of all the possible points of failure. I have seen shops with only 1-2 truly knowledgeable diagnostics personnel and the rest of the staff perform mechanical tasks! 😅

[@NDLAP66]

From a DIYers perspective... I have watched many of these videos from others including S.D. and this one is by far the best explanation I have seen and makes me confident in diagnosis. Thank You a Million.!

[@dmystify1381]

totally agree,some just pfaff about,this channel gets str8 to the point.Subbed

[@mansorabdallah8617]

This is a professional and well-crafted video that serves as a comprehensive reference guide for troubleshooting CAN bus system faults. Thank you !😊

[@Ecutestinglimited]

Thank you! Glad you enjoyed it 🙌

[@JohnDoe-sp8zg]

2nd that comment. Perfect set up, followed by how too test with a visual and what to expect. Chart matrix awesome

[@teoteoo5437]

@@Ecutestinglimited i have problem with code P0600

[@itsjustchris3306]

Your videos are the best, the best part is the animated explanation, so easy to understand

[@Ecutestinglimited]

Thank you so much! The animations take a long time to create, so we are really glad you found them useful! 🙌

[@JohnDoe-sp8zg]

Animations drive home point your making and the aha moment goes ding ding. Thanks for taking they one to incorporate them. Nailed how to teach.

[@Ecutestinglimited]

Thank you so much@@JohnDoe-sp8zg !

[@tunchipva]

@@Ecutestinglimited What software do you use to create animations?

[@lekonarodrick6821]

Simple straight clear and simplied

[@wannaPreG]

He is a killer bee, when it come to teaching, Infact I give him all my vote… Elohim bless you more and more… am one of the grateful fans of your informative videos… thanks and Good health

[@Ecutestinglimited]

Thank you for the support 🙌

[@RickysCarRepairs]

This is great! I've been looking for a clear and simple to follow video on CAN diagnostics and this is so well explained and easy to follow! Thank you so much!

[@lekonarodrick6821]

You are totally outstanding in ur teachings

[@Ecutestinglimited]

Thank you for the kind words, we're happy you liked the video! 👍

[@reynaldoclaveria100]

Hi Tim! you are the solution to those can not afford to buy expensive scanner.your instruction is absolutely valuable and easy to understand.

[@Ecutestinglimited]

Thank you! We're glad you found the video helpful and easy to follow👍

[@AdrianVann]

This is by far the best CAN-BUS diagnostic video I’ve seen in over 2-3 months of learning about CAN-BUS issues on my 2005 Land Rover LR3. Wish KZbin would have shown me this at the start of my learning journey!

[@Ecutestinglimited]

Thank you for the high praise, we're glad this has aided your understanding! Hopefully your Land Rover is all fixed now 🙏

[@AdrianVann]

Not yet - but I have a good plan for methodically diagnosing it now to find my issue.

[@ofalejandro12]

the best video about can bus i thought was more complicated thanks

[@cullenmiller8170]

Great video and explanation. I specially like the visuals you provided with the video. 👍👍

[@Ecutestinglimited]

Thank you! We're glad you liked the video 🙌

[@howardatherton3889]

Many thanks for excellent clear video

[@williamephraim5522]

Learnt great deal of Knowledge to apply plus you have taught me a great deal of how to approach U faults Codes❤

[@OilBaron100]

Great video, one of the best car diagnostic videos I’ve ever seen.

[@Richard-hg2ro]

Hey you're a savior, i appreciate your knowledge , keep on, keeping on

[@tahir1156]

Beautiful clip I am a mechanic but want to learn car electronics specially for modern cars can bus system and so on....thank you

[@rtwynn24]

Finally after all these years someone explained can bus in a simple way a even I could understand...so as Denzel Washington said in training day My Nigga 😊😊

[@poka703]

Man, just wanna say Thank you for what you are doing. Event though English it's not my native language it was so helpful. All my respect.

[@Ecutestinglimited]

Thank you, we appreciate your support! 🙌

[@bekomcar554]

Thank you Tim for your time and sharing professional insights, even someone like me could understand what CAN BUS is, at least a basisc understanding. Cheers.

[@THE-AIDEN-PROJECT]

Great video 🙌

[@Ecutestinglimited]

Thank you! 👍

[@PeterB12345]

This is a proper education, thank you so much!

[@10malabdullah10]

Great video and explanation.

[@Ecutestinglimited]

Thanks! We're glad you liked it!

[@zeke1eod]

Extremely useful and fast diagnostic techniques. Thanks for sharing, stay safe, and God bless

[@BosungLee]

Respect from South Korea! What a great video!!!

[@frag9090]

Thanks, your video is inspiring to learn more and more, for me as a Renault owner specially, nobody wants to put hands on the job, and some self called technicians want to replace all the motor, one piece at a time to solve the issues. One question, what if the resistance between high and low speed can becomes crazy moving up to 500 ohms and decending to 50 ohms?

[@abdullahalla1696]

Wow 😮 , the pest video ever explains everything about can bus , so glad I watched this video today , learned something new today

[@rsbharley4766]

Excellent video Tim, thanks for taking the time to share. Cheers

[@daliborsacaric5258]

Got a failure by turbo pressure on a D5 volvo, could ne the sensor, a pipe, the turbo, in the end of logic it was a soldering point in the vct actuator.. Resoldered and it works, takes time, but any good diagnose takes time and feel what you are doing.. Great video, thanks how to do it manualy

[@Ecutestinglimited]

Thank you, good job on the diagnosis! 👍

[@sajadkarimy2517]

Wow , that was so helpful about the can function, thanks for all this info you spare us

[@pavelgochev3153]

Very insightful video!! Thank you!

[@Ecutestinglimited]

Glad it was helpful! 🙌

[@richardstokes755]

Amazing company thanks for the information.

[@mehmetiyibas]

You explained crystal clear sir. Thank you so much

[@FawziSabri-u1m]

I like your videos so useful, thank you for sharing it

[@bluedeckelectronics]

Good video ! Thank you !

[@1waukesha]

Thanks for the video! I subbed to your channel for the good info ! I spent all day today trying to diagnose a Bobcat tracked skid loader that is having electrical gremlins and it won’t power up the display panel. I traced the problem down to a faulty control/display module. Its always a little stressful calling bad modules when they cost $1500 dollars to replace! But based on everything I seen its gotta be the panel.

[@MohammedMohammed-op3cz]

By far this is best video explaining vehicles can bus communications..bravo .. i am subscribing.

[@hazmechanic7996]

The intro earned you a 👍 I’m going to complete the video before I hit the (subscribe)

[@jagathchristopher4103]

Great work, I am also a technician I got more information from this video. Thank you.

[@tonyarthur2828]

Thanks for the video!

[@Ecutestinglimited]

You're welcome! Hope you found it useful.

[@ThunderbirdRocket]

Nice 👍🏼 ! Extraordinary detail ! Super helpful !! I learned lots !!! Thanks mate . 👊🏼 🔥

[@mihailpopov1246]

Thank you!

[@NURsMec]

I just subscribed. Your video give as a lot of ideas on diagnosing wiring troubles. Im in a auto mechanic school in California and looking for a electrical training shop

[@jstylpie9346]

Agree best simplified by far and heading back to the garage to troubleshoot. I'm working on a project to customize 1996 with a 2017 canbus. I'll be removing some of the canbus devices, but not sure how to get around a device that won't be used anymore. Like the electronic parking brake. But still, I will keep using the manual ebrake. Do I need to loop high w/high etc or how would I terminate the end as in the device did not exist. I will edit it out of the programming as well. Thanks

[@suradinamo27]

perfect video i like it this is so useful, thanks

[@jerrys1426]

Throughly enjoyed your tutorial. I learned a lot from it. Only one minor complaint. I find the background music annoying. It be a petty complaint, but I’d rather just focus on the speaker. Sorry if this seems overly petty.

[@mikeburdi3464]

Just subbed! Your content seems to be put together well with some good, useful information. As a licensed auto mechanic for 30+ years, I always appreciate learning something new or even just refreshing the old memory every now and then! Lol... Take care everyone and remember, knowledge is power! 👍🏼

[@Ecutestinglimited]

Hi Mike. Thank you for the kind words and thanks for the sub! 🙌 It's great to hear that even someone with your experience can take something away from our videos. Thanks again for supporting the channel 👍

[@petersonmerisma]

Excellent good job

[@gustavogutierrez6220]

Good family and great mechanics god bless you

[@AUBAFordChannel]

Excellent

[@Arthur-sz7uf]

Very informative video. Thanks for the info.!

[@Mequainnt]

Awesome!!! Thank you the experts!

[@sebastianperales4915]

Thank you

[@alfredo9173]

Fantastic.

[@TheMeisterKang]

The video is good, but for more detailed and accurate troubleshooting, I recommend using an oscilloscope. You can distinguish between main line and sub line issues by examining the waveform.

[@Dickson-T]

unfortunately i cant put more then one like ! very good video !

[@arga1966]

Great video Subscribed 🤩

[@Ecutestinglimited]

Thanks for the sub! 🙌

[@jcaguirre3893]

Buena explicación de la red can bus ya tienes otro suscriptor 👍🏻

[@ofca_garage]

great tips! parabens pelo conteúdo. Com certeza vai somar muito no dia a dia da nossa oficina.

[@Ecutestinglimited]

Thanks for the kind words 👍 We hope it helps you out!

[@JohnD0h_IT]

Thanks for the excellent video! Could be great if you do a video tutorial about the VCDS with a VW car!

[@harvindermanku4703]

Good video can bus

[@fage999]

Is really use to useful Very Thanks a lot 👍🏻😃

[@johnhill3644]

I thought the battery had to be disconnected for checking CAN system?

[@jsflood]

Great video, thank you. One curios phenomena I have with both of my cars regarding the CAN bus on the ODBII connector, there is no voltage nor any resistance (open circuit) on pin 6 and 14. I tried measuring it with both an oscilloscope and ohm meter. What's going on here? 😀. My cars are Toyota Aygo and Volvo S60. Even when the engine is running there is no signal in the oscilloscope on those pins 🤔

[@palanik1960]

Very well explained. But my question to manufacturer , why canbus is not redundant?. Why there is no graphic way of presenting the communication devices in single page of display ?.

[@davi5music521]

Older Cars doesnt have 6/14 pins in Obd, only 7 K-line.

[@k.y22]

thank alot sir👍👍👍great vedio

[@Ecutestinglimited]

You're welcome, thank you for your support 🙌

[@uvaisputhiyara7867]

Very informative class sir ❤

[@VivoJefindo-id4cj]

Best learn from this video

[@madayaswanth1205]

can u make video on CAN protocol explanation

[@Noshaqreparingmethod]

Im gonna do it

[@camel_2992]

I bought a used vehicle and long story short i noticed a u0401 code. Meaning invalid data from ECM. I also have a p0101, and a p0102 if i remember correctly. My father and i also noticed that there seemed to be electrical tape around some wires that are right behind the ECM connector plugs. I found the wiring diagram and found that it seems like a single terminal does not correlate with the correct terminal that the wiring diagram says it should be. When using the continuuity mode, we found that it goes to a terminal position that is supposed to be a selonoid valve of some sort. We think rodent damage to the wires, or some other unkown damage was done to the ECU cables and whoever tried repairing the cables mixed up a few cables, but not enough to completely ruin the ECU, considering thr car still runs absolutely fine without many issues. It doesnt run well at full throttle due to the MAF sensor codes and not recieiving the correct signal to thr ECU. Anyways i had a lightbulb moment after watching multiple videos of yours. I bet the u0401 is caused by the miswired repair that the kast person did. Its causing the maf sensor and IAT sensor to get incirrect readings, and causing the ECU to not recieve valid data and therefor throwing that u0401 code. Could you confirm my suspicions? Im still at work so im not able to work on it, but your input would be absolutely appreciated. Very informative videos!

[@renju20082012]

THANK U

[@zeen812]

this video is really good

[@Ecutestinglimited]

Thank you! 👍

[@laweenalbotany1734]

This is a great video

[@alexis9403]

Ive had 2012 prius codes U0073, U0123, U0124, U0126, and U0293 and have been researching for hours how to check the wiring (I have already checked the fuses and will be double checking the battery). There is no good information out there explaining everything like this video. Everything makes so much sense and now I'm less scared to tackle this. I don't trust mechanics so I want to learn how to solve my own issues.

[@shop-k3p]

NICE VIDEO!

[@arminhakimi637]

Wow i can just say woow👍👍👍

[@bobnicholson6350]

Have a 2014 Dodge Durango 68K... everything works fine BUT when the New York State inspection scan tool inserted into obd port emgines revs and lights on dash go all on...Any help...Nothing happens when regular scan tool inserted...any help?

[@steveramoso962]

i need this

[@kresha2621]

Hi. what if diagnostic pc read: 1) there is a short circuit to ground? 2) A short circuit exist to battery (+) or an open circuit exist? thanks

[@melquiaraujo3927]

Terrific job on this video... I only recommend you to speak a little slower!!!

[@DavidBesko]

Help! I went through the process and got to the Diagnose CAN Bus open circuit part and got stumped. I pulled the module with the faults, BCM, and measured the wires a got a reading of 120ish ohms. The video covers 0 and 60ohms, but not 120ohms. What is the fault for 120ohms? I did originally test the OBDII port and had a reading of 60ish ohms. My only thought is that it is not seeing an end resistor. What should I do next?

[@Hhtfvhrcbgrejkkjhffvbhb]

Sir, very nice Sir, can high and low is dc voltage or ac voltage (signal)???? Sir, I reparing electric charger but this charger not on without bms battery ,, now sir how to on without bms battery for testing purposes. Please guide. Charger use four wire can H, can L, ground1, and ground 2(bms use in)

[@grosom31]

Hi, if you have a short to voltage i assume that would appear as a parasitic drain, and potentially cause other issues, i have a qashqai that has a serious drain, and is missfiring and is giving codes for a can issue with the cruise control and there was another of the same code, i am trying to figure if its a module or wiring right now?

[@RobertDean-w3r]

does a car with a gateway module change the testing procedure

[@sunrisesystems9280]

Just one point the Canbus can also still work in single line mode using either Can High or Low and Ground, OBD diagnostics usually shows this condition, it can work with short or open cirtuit. Everything can appear to work as normal, but noise can cause intermittent function.....Would like comment how this condition can be easily tested, as Can High and Can Low do not appear to have a ballanced termination resistor to ground

[@franklynnbird5021]

What are each of the modules shown in the diagram used to describe the can bus network?

[@mwangijohn538]

Hi just leant a lot I please need help from understanding diagnosis of ecu

[@OnShouldersOfGiants]

Have a 2004 Volvo v70R. My CEM was overheating and shutting down my high speed canbus. I fixed my issue(we will find out this summer if i really did) by installing heat sinks for a raspberry pi computer on it with a small 3d printer fan. Seems it was a thing for that year of Volvo. Hope this helps someone.

[@joshuaedgington3160]

if the resistors are 120ohms, why do we want a 60ohm reading when shooting through them? wouldn't 120ohms of resistance on a 120ohm resistor indicate the resistor is good? asking because i dont understand. thank you!

[@faresabijad4581]

I find your video are very helpful

[@orangecrush50]

Not having access to a wiring diagram is the hardest thing. Ive been looking for a diagram for my truck and havent been able to find one at all. Shops usually have access to this but not diy's like us.

[@4YouWHOyou]

In many newer cars in between obd port and can bus is gateway module so you cant always do a resistance check

[@PH-Truck-Mechanic]

Very great explanation. For trucks it's the same way to do a diagnosis?

[@Ecutestinglimited]

Thank you! The fundamental principles and protocols of the CAN bus system are the same across different types of vehicles, including passenger cars, trucks, buses, and even some non-automotive applications. However, the implementation can vary significantly between automotive applications and trucks, and even among different manufacturers and models. Trucks, especially commercial heavy-duty ones, may have more complex CAN bus networks due to their advanced systems for cargo management, additional safety features, advanced telemetry for fleet management, and other specialised systems not typically found in passenger vehicles. We would always recommend consulting your specific vehicles wiring diagrams and vehicle schematics before conducting any tests and making any conclusions. Hope this helps!

[@sauls8250]

I'm working on a 2015 Mercedes-Benz c300 I don't have communication at all. I have 62 ohms on pin 6 & 14 when the car is sleep once I cycle the key. I get 1.2 ohms it would stay like that until it goes to sleep which takes about 45 minutes. I can't find where the 120 ohms resistors are located. I'm suspecting it is a module but which one. Help help Can high is 2.6 can low is 2.4

[@milevyo]

i couldnt understand the difrence between short to voltage and short to ground. ( what is testing for continuity? ) shouldn't we perform test for short to voltage by testing pins 6 & 14 to V+ ?!!