CAN Bus Wiring and Protocol Explained (Part 2)

"How a communication bus is wired determines how you diagnose it!" In the second part of this three part series, we dive deeper into CAN Bus wiring and how to breakdown networks even further. While still taking a real world approach we will discuss the differences in network topology and the protocols used to speak on them.
CAN Bus resistor -- amzn.to/3OIAUWm
CAN Bus Communication Explained (Part 1) • CAN Bus Communication ...
CAN Bus Troubleshooting and Diagnosis Explained (Part 3) • CAN Bus Troubleshootin...
#cars #learning #autorepair #diy #fixed

[@heny3231]

I rarely comment, but I'm compelled to tell you how much I have enjoyed every minute of your teaching, it is very well presented, with great explanations and covers the topic thoroughly. Thank you so much, please don't let us wait too long for the next instalment! Keep up the excellent work!

[@GoTechTraining]

Hey heny, It’s amazing to hear responses like this ! It take a lot of work to put these together and this makes it worth it. Thank you for watching ! ~Ryan

[@cpcoark]

I said it for part 1 and I'll say it for part 2, Excellent series. I have a EET degree so I understand everything you said. You really tied it into the operations of the car. I am learning a ton from this series.

[@GoTechTraining]

Seriously thank you so much! It means a lot to hear that! Part 3 in progress! ~Ryan

[@ReimaginedWraps]

Man what a great course. Thank you so much for spending the time to make these videos!

[@KeepWrenchin]

Definitely the best can bus training video ever. Very complicated subject spelled out in a way that unravels the complexity and uses practicality as the foundation for the explanations leading to simplified understanding and near immediate practical application. Thank you sir!

[@GoTechTraining]

Definitely the best comment ever! Thank you so much and I’m glad you enjoyed the video! ~Ryan

[@spirokattan3655]

What a great learning series Ryan! Looking forward to the next part! Thank you!

[@GoTechTraining]

Thank you for checking it out ! Part three is in the works ! ~Ryan

[@jtoddowen]

Part 1 and 2 were both excellent, so thank you. After 35 years in the business, albeit not automotive, I've never heard the term "protocol" used the way you did. CAN was modeled after RS-485, even using the same 120 Ohm characteristic impedance on the differential bus (in most CAN implementations). What you call "protocol", people in my industry call the "physical layer". We make this distinction because the Open Systems Interconnect (OSI) model differentiates seven distinct layers of a "protocol". Above the physical layer is the "data link layer" where the "hardware" addressing part of the occurs, like a MAC address on Ethernet. This is followed by the "network layer" (like an IP address) and so forth. These can all be considered separate "protocols" or all part of one big "protocol". Your emphasis on the wiring topology was excellent and a frequently overlooked part of the diagnostic process. When you grew up before CAN existed and still work on pre-CAN equipment, you naturally did / do this, but too many technicians today just want to use a device--so thank you for emphasizing the basics!

[@GoTechTraining]

Hello, Thank You! As an automotive instructor, I saw a need for taking this topic and simplifying to a point where new techs can understand it. Most of the current training focuses too much on the 1's and 0's or the attributes of each protocol. High level training even goes into de-coded CAN messages and engineering level commands. While this is great info, it can make the topic intimidating and rarely helps you fix a issue in a automobile. Training young techs, the biggest challenge is getting them to the right spot to test, on the right Bus or section of the network. Problem solving from there can be as simple or complex as they want to make it. Thanks you again for watching the video and reaching out! ~Ryan

[@smiles7631]

Thanks Ryan! I am learning alot and you are taking alot of the confusion out. I understand that these companies are getting more complicated with their systems for security and such. But paying extra for the info we need is getting old. I believe they are wanting you to go to the dealership for repairs and holding their info for this reason. It will be propieritary info. I believe that the forklift industry does this. The days of fixing your own car are slowly going away. I've racked up quite a bit of money just in subscriptions to get info lol. Lets hope we can stick together and keep that from happening. Thanks again!

[@GoTechTraining]

Yes! I agree that's part of it. It hurts the customer as much as the technician sometimes. It is almost making it impossible for aftermarket shops to repair some vehicles. ~Ryan

[@jgeorges3061]

RAYN, you ROCK brother awesome teaching and approach /information really an eye opining now I need to buy a scanner with TOPOLOGY and watch again this series of ur teaching as always thanks for doing what u do cheeeeers from ON/CANADA.

[@GoTechTraining]

Hey, You’re welcome! Cheers ! Part 3 coming soon! ~Ryan

[@danspears635]

Exactly I’ve watched Hundreds of videos and was always lacking what you just shared and didn’t realize it until it becomes time to diagnose network system fault on the vehicle then all of a sudden it wasn’t so clear thanks👍

[@GoTechTraining]

Thank you for watching and reaching out! I’m really glad people are enjoying the series! ~Ryan

[@micksautoelectrics8750]

I have learned so much watching your last 2 videos, Can`t wait for the 3rd :) :)

[@GoTechTraining]

Happy to hear that! Working on Part 3 now! ~Ryan

[@GoTechTraining]

Part 3 Thursday!

[@Martin-yf5zk]

Substituting the 120 ohm resistor to diagnose was pure gold for me! Very well done series 👏. Can't wait to start the 3rd one

[@keithbrown7406]

Simply the clearest network training I've seen. Many thanks👍

[@GoTechTraining]

Hey Keith , Thank you for the kind words ! Glad you enjoyed it ! ~Ryan

[@allinmuza2961]

Thank you very much for taking your time explaining something difficult for free much love from Zimbabwe

[@GoTechTraining]

Hello Allin, Thank you for reaching out and helping support the channel! Stay tuned for part 3 ~Ryan

[@Sk8somedays]

I’m dealing with an 07 RAM with no ecm com crank no start. You opened my eyes can’t wait to go back to it.

[@omarmarsh-mo8nf]

Hi my name is Omar Marsh, I truly appreciate this class... Great job, explanations were spot on...

[@martinboucaud679]

Great job my friend. Keep up the good work.

[@GoTechTraining]

Hey Martin, Thanks for watching! ~Ryan

[@ThunderbirdRocket]

I’ll say this is the ultimate lesson out there ! Thanks !! Have a fantastic day mate !!

[@GoTechTraining]

Thanks for the kind words! Have a fantastic day as well! ~Ryan

[@salvadorgutierrezr5914]

Thank Ryan for teaching us 🙏God bless you

[@GoTechTraining]

Hey Salvador, My pleasure! Glad you enjoyed it!

[@angelpaws2674]

An Auto sparky with 35 years experience and working on can issues daily, this is well worth your time to watch! I'm going to try this method for sure.💯

[@GoTechTraining]

Right on! Thanks for reaching out! ~Ryan

[@manueladams5327]

Mate, You are up there with Scanner Danner passionate Teacher big big Thanks!

[@kyletuttle9064]

Great video you are opening doors for all of us.thanks for the informative class.

[@GoTechTraining]

Hey Kyle, Of course! It is great to hear comments like this ! ~Ryan

[@HarpritSingh-bw5uo]

Just awesome, eagrly waiting for the next classes, Best communication training with reallife knowledge

[@GoTechTraining]

Hey Harprit, Thank you for the kind words! Glad you enjoyed it Part 3 in progress! ~Ryan

[@arthurfricchione8119]

Ryan another very well laid out course. Did I grasp it all probably not so I’ll watch it again and grasp some more knowledge. It’s called learning. You have given my self a whole new perspective on. Now it’s up to me to pull up schematics on my own vehicles and try and follow the roadmap you have given us. Thank you for taking the time to put this course together. Artie 👍

[@GoTechTraining]

That sounds like fun ! keep watching you will be an expert in no time ! Thanks for the support Artie! ~Ryan

[@kennykrylov4513]

Can't wait for part 3. I'm getting ready for Chevy SUV with no comm to anything except for ebcm I think. Just got me a scope, still have lots to learn. Thanks for putting these up

[@GoTechTraining]

Of course! Working on part 3 now! Thanks for the feedback! Glad you enjoyed it! ~Ryan

[@Autorepairtechs]

Great video Ryan keep it up

[@GoTechTraining]

Thanks for watching and reaching out! ~Ryan

[@alrifainidal]

Excellent series. I am learning a ton from this series.

[@GoTechTraining]

Hey Nidal, Thank you! It is great to hear when people are learning from our videos. ~Ryan

[@alrifainidal]

@@GoTechTraining I am just speechless and cannot find words to thank you

[@GoTechTraining]

You already did by letting us know you enjoyed it!

[@andymitchell5423]

Thank you for this video. I recently had to clone an ecu for my saab and even though it was successful I was still struggling to understand alot of it. This video helped me tremendously and just wanted to say thank you for sharing your knowledge!

[@GoTechTraining]

Hey Andy, Great to hear! Thanks for watching! Part 3 coming very soon! ~Ryan

[@mikechiodetti4482]

The configuration breakdown helps to understand what your dealing with. I know SMA Eric O had shown how to break down the system to locate the problem including jumping the wires at the module connector for the pass through testing. Your training gives the basics to build on to make it easier to understand. Before I retired in 2016, I had limited involvement with these systems. Now it seems like that's how these vehicles run, that is, on module communication. Thank you for this video, looking forward to the next one!

[@GoTechTraining]

Hey Mike, I agree, the basics are the key to building upon and understanding these systems. We are one step away from the paint being a module on a car. Thanks for watching and reaching out! ~Ryan

[@johnmitchell8925]

Thank you for being a teacher

[@GoTechTraining]

You’re welcome! Thanks for reaching out and checking out the video ! ~Ryan

[@thomasmanion2903]

This series has the takes the time to teach from an understanding of the systems as apposed to massive amounts of data you have no way of processing.great job

[@neverstoplearning382]

Keep the teaching, great just great. Thanks a lot for such an amazing series.

[@GoTechTraining]

I’m glad you enjoyed it! Great motivation for me to keep making videos! ~Ryan

[@volts2twelve239]

Sir thank you for your teaching.its very informative and it help me for deep understanding in GM CAN BUS.

[@James-fs4rn]

👍 very well presented and helpful. Thank you!

[@GoTechTraining]

Hey James, Thank you! ~Ryan

[@alanw5879]

This was freaking awesome, I know its 9 months old, but Im just finding it, thanks so much for putting this together and all the detail, just the refresher course needed. Really appreciate your time on this.

[@Gfitaliacorse]

Like part 1 , this is very professional, I learn lots, thank you again

[@raymondmetcalf9110]

watched all 3 really enjoyed the series learned a lot . thanks for the time you spent putting it all together as i have certainly learned e lot on how to attack the problems from a different point of view well explained. Absolutely fantastic CHEERS.

[@alexkravchyk9495]

Awesome lecture. All information presented in brief, practical and concise manner. Can't wait for part three.

[@GoTechTraining]

Hey Alex, Glad you enjoyed it! Part 3 in progress! ~Ryan

[@bakryahmed9178]

You like to play with different shapes..... I love it😂😂😂

[@ekimbrough1413]

Excellent Vid series Ryan! I sure do appreciate ya! You and Scanner Danner are awesome dudes!

[@nassimennajih271]

Hi Ryan. My day job is electric control in a plastic facility and i've never understand car can bus!! Now it's clear as water😮. Thank you for taking time to do such nice videos ,you help so many people out there. Big ❤ from Quebec Canada.

[@treyinok]

Awesome series! Really enjoying this learning experience. Thanks for taking the time to put this all together!

[@GoTechTraining]

Hey TreyInOk, Your welcome! Glad you enjoyed it and are learning from it ! ~Ryan

[@jrc2905]

Thank-you this is the first time I am able to begin to understand what can bus is and how it works, thanks again.

[@Ricky-kp5ys]

I’ve been waiting for this thank you great teaching

[@GoTechTraining]

Hello Ricky, Glad you enjoyed it! Thanks for reaching out!Part 3 in progress! ~Ryan

[@stephanecampeau9814]

Ok, now you talking series data bus . In my last post, I was talking of that data bus. Thanks

[@GoTechTraining]

Hey, No worries! Thanks for watching and reaching out! ~Ryan

[@isalmankhan1]

Superb Thanks for educating us Bro👍 Really complex subject explained thoroughly & easier to understand, Great work👍 Stay Safe Guy's❤

[@GoTechTraining]

Hey Salman, Thanks for all the support! ~Ryan

[@isalmankhan1]

@@GoTechTraining Thanks Ryan these lectures mean a lot for me, they're a proper guide to troubleshoot these systems professionally👍👍👍

[@GoTechTraining]

You’re welcome!

[@bobcombs7138]

Top notch training!

[@JohnDoe-wv5hv]

Excellent information! Thank you much!

[@jakelong2544]

the way you explain everything makes it very easy to understand. im currently halfway through school for automotive technology and have started to encounter a lot of overwhelming stuff due to all the new features and such. this gave me a whole new level of confidence! definitely will be watching any more classes you make!

[@mike-yp1uk]

Love this series. Thank you

[@misaelcervantes9435]

Thanks for your support and help us to be better mechanics

[@GoTechTraining]

Hey Misael, Of course! As a technician myself, we need to spread as much information as possible to help our industry ~Ryan

[@jesseruiz2337]

Great presentation, thanks for sharing.

[@briankibia6903]

Learning alot. Thank you for making this happen

[@GoTechTraining]

Hey Brian, Glad to hear your learning from this! Thank you for reaching out and commenting! Part 3 in progress! ~Ryan

[@RSKRescueEquipmentInfo]

Id like to get my hands on your slides and incorporate it in my own training for my company as this is the best series ever

[@Yulian.Mladenov]

Very very useful explanation! Thank you very much! The first man who explain the things ,how in the real live they are.

[@albertantwi702]

Your teaching and explanation clearly speak volumes, very understanding.

[@GoTechTraining]

Glad to hear that! Thanks for watching! ~Ryan

[@duaneburris7ate9]

I too am compelled to say thank you for sharing you failures and success and what you've gleaned from them.😊 nothing works well unless we work on it together.

[@michaelgalvin1024]

Part 3 come on, don't slacken off now, it's been great so far, From down under

[@GoTechTraining]

Hey Michael, It is coming soon! Thanks for watching the first 2 parts and reaching out! ~Ryan

[@smiley3012]

Even though I'm old and not the sharpest tool. You teach this complicated subject so I can understand. Thanks

[@davidche554]

One of the best lecture series I've ever seen

[@davechan5159]

Excellent!! Well done Ryan, keep the instructional videos coming. I particularly liked the play by play - going back to the schematic and reviewing often what was learned and reinforcing the points was vital. Thanks for adding another knowledge tool to the diagnostic tool box!! Cheers!!!

[@eacherenkeka]

Really well explain Ryan! A lot to learn in this class! Thank you for sharing and I'll be waiting for part 3.

[@GoTechTraining]

Awesome! Part 3 coming soon ! ~Ryan

[@rjmlondon]

Amazing info explained. Im just getting into CAN as i have a car that runs it and these sessions have helped clarify many things. Wonderful stuff

[@GoTechTraining]

Great to hear! Thanks for watching! ~Ryan

[@emmanuelrobert1216]

Awesome lecture.... I'm looking forward to seeing part 3......Ahsante sana🇹🇿🇹🇿🇹🇿

[@OR-River-Rat]

Great follow-on to the first block of instruction. I like how you provided the right amount of information to clearly support your points and goal of the series.

[@ballubhadoriya4265]

What an amazing way to make an complex topic so interesting , every moment of the video is power pack of information.

[@nlanni]

Amateur mechanic here. Been doing it since mid-70's. I have a dealer's full set of manuals for my car, which is great until I look at the electrical can buses - a 2006 Lincoln w/ LS & HS buses. I'm having trouble with a couple of modules and nothing makes sense. Now they do make sense. Thanks. BTW. I have a computer technology degree and the 1st they teach you is network topology - so you're doing it the right way.

[@manoramachandran9192]

Thank you for sharing your knowledge

[@GoTechTraining]

Thank you for watching!

[@Sophie333C]

Great video, delivered with passion and technical professionalism.

[@GoTechTraining]

Seriously thank you so much! It means a lot to know people appreciate our videos! Thank you for the support! ~Ryan

[@sbcandmagnum]

Thanks for the teaching

[@GoTechTraining]

No problem! Thanks for reaching out! ~Ryan

[@mgherter]

Lapsed engineer here....the thinly veiled rage when you said "please comment" had me rolling.

[@GoTechTraining]

Hahaha 🤣 Subaru network engineer? LoL Thanks for watching ! ~Ryan

[@speedy_pit_stop]

Hi, I'm somewhat new to the channel. Coming from a more "traditional" computer & network technology background, it is refreshing to see how that translates so well into the automotive world of today. And with things like DoIP evolving , we are about to completely bridge the gap between the two. Good job... 8 bits in a byte but I enjoyed the video.

[@lukas181118]

The best video so far about can bus Bro 🎉

[@GoTechTraining]

Hey Lukasz, Thank you so much! It is awesome to hear! ~Ryan

[@AliNormukhamedov]

Amazing !!!! Thank you so much !!!!

[@greasyryno2980]

Fantastic info

[@ironman-fw4xx]

Thank you for making this very easy to understand! (especially for the younger audience) 😭😅💙

[@ebrahimsadeghi5883]

Super helpful 🙏🙏

[@MrClarck100]

This is a great class, makes understanding all the networks much better. I'm really looking forward to the testing part and learning new tricks. Working mostly on BMW the topology is a little different with so many sub-busses and networks, but having 45-50 modules on the average modern car it can't be different.

[@GoTechTraining]

Glad it was helpful! I like to test known good cars as well to learn thing about the network. Then when I have an issue I can use known good results to compare to the broken car. Thanks for watching ! ~Ryan

[@MrClarck100]

@@GoTechTraining Correct, that is very helpful too, for reference, you know immediately if something is off with your readings.

[@FSaeed-sp8zz]

Thanks, sir, very informative and easy to understand. I think it is the best video I've seen on the internet ever. Love you from Saudi Arabia

[@GoTechTraining]

Glad it was helpful! ~Ryan

[@GoTechTraining]

Part 3 coming soon !

[@bartowl]

i cannot await next part. This stuff is really brilliant!

[@GoTechTraining]

Thanks for watching! Part 3 Thursday! ~Ryan

[@wentzelnel7723]

Good work team

[@GoTechTraining]

Thank you Glad you enjoyed it! ~Ryan

[@ficotobar361]

exelent teacher

[@IngeBall]

Great content!

[@GoTechTraining]

Thanks for watching ~Ryan

[@shakeelsss]

Well explained

[@CM-Gram]

Hey man thanks alot for the clear and well though explanations ❤

[@GoTechTraining]

Of course! Thanks for watching ! Part 3 coming soon! ~Ryan

[@farmanyusif3558]

Great job keep going well done...

[@GoTechTraining]

Hey Farman, Thank You! it means a lot people enjoy watching it ~Ryan

[@Gilsal89]

Ryan, thank you very much 😀

[@GoTechTraining]

Hey Gil S, Thanks for watching!

[@johnmulrine3084]

Exelent presentation

[@GoTechTraining]

Hey John, Thank You for the support and reaching out! Glad you enjoyed it! ~Ryan

[@edgarmojica6145]

Great video 👍

[@GoTechTraining]

Hey Edgar, Thanks for watching and reaching out ! ~Ryan

[@rogertoledo4407]

Thank-you.😊

[@Me-zo8yc]

You guys are amazing 😁

[@GoTechTraining]

Thanks for watching !!

[@dailylifequotesforsuccess]

amazing!

[@tonykinser2678]

Great job again

[@GoTechTraining]

Hey Tony , Thank you for reaching out ! ~Ryan

[@user-hr2ql3uk6v]

Очень круто, спасибо!

[@mohamadmushrif7689]

Good job broh❤

[@hugosotelo6411]

THANKS!!!!!!!!!

[@aymenmohamed1134]

Awesome

[@sheerwillsurvival2064]

Excellent

[@GoTechTraining]

Thanks for checking out the video!

[@abbshus7421]

Great ... Thx 🎉

[@GoTechTraining]

Thanks Abbs Hus!!!!

[@borjgon]

Dude u r awesome

[@GoTechTraining]

Your awesome for watching the video! ~Ryan

[@richrodriguez6543]

And that kids is your introduction to Data Communications 101. Go find a book titled something like; Intro to Data Communications. It will reinforce the good information being shown here. You may continue reading on that subject and quickly find this is what IT guys do in their air conditioned buildings, Khakis with clean hands. They get paid quite a bit more than the Hyundai dealer is offering too. Soon you'll be selling off your Snap-On collection to finance Fluke branded tools. Paid vacations, regular pay and benefits. Yes this is why most shops can't diagnose your car. The sheer volume of knowledge required is worth more than what the dealership is paying. Congratulations on your new career path. Great videos both parts 1 & 2. You're making a complex subject very understandable. - retired IT guy

[@GoTechTraining]

Hey Rich, I can’t say I don’t agree with you ! I’am also part of a college advisory committee. We talk all the time that in the future one technician won’t fix everything. There will be IT techs that only work on electronic systems. This day and age it is hard to find one person that wants to do IT and engine rebuilding. Thanks for watching and reaching out! ~Ryan