OBD2 Explained - A Simple Intro [v1.0 | 2019]
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- เผยแพร่เมื่อ 20 พ.ค. 2024
- UPDATE: Check out our new v2.0 intro to OBD2!
• OBD2 Explained - A Sim...
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What is OBD2? What are OBD2 PIDs? And how to log OBD2 data?
www.csselectronics.com/pages/...
In this basic intro to OBD2 we go through the basics, data logging, PIDs and more!
OBD (On Board Diagnostics) is the vehicle's self-diagnostic system. It allows for a standardized method for accessing various data, diagnostic trouble codes and more from cars, medium-duty and heavy-duty vehicles. In practice, the OBD2 protocol allows a mechanic to use e.g. an OBD2 scanner or code reader to identify the underlying issues behind a lit malfunction indicator light (MIL). But OBD2 is also relevant as a source of real-time vehicle data for use in e.g. fleet management, fuel optimization, CAN sniffing and more.
In this video and the article, we in particular focus on the data logging part of OBD2 - how is a message structured, what is an OBD query / request vs. a response message, what are OBD2 PIDs and much more. We do so through concrete examples like Vehicle Speed and RPM to make it easy to understand.
For a quick intro to our CANedge CAN bus data loggers, check out the below!
• CAN Bus Data Loggers |...
See also our intro to OBD2 data logging:
www.csselectronics.com/pages/...
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INTROS TO CAN BASED PROTOCOLS
This video is part of our extremely popular series of CAN protocol intros. Below you'll find links for our full playlist, as well as the more detailed articles.
Playlist for all intro videos: • CAN Bus Explained - A ...
1) CAN bus: www.csselectronics.com/pages/...
2) OBD2: www.csselectronics.com/pages/...
3) J1939: www.csselectronics.com/pages/...
4) CANopen: www.csselectronics.com/pages/...
5) CAN FD: www.csselectronics.com/pages/...
6) LIN bus: www.csselectronics.com/pages/...
7) DBC files: www.csselectronics.com/pages/...
Tip: Want all our CAN intros in one 100+ page PDF? Then get your free 'Ultimate Guide' now:
www.csselectronics.com/pages/...
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RECORDING & DECODING CAN BUS DATA
If you're interested in learning more about logging CAN bus data, we recommend that you check out our below intros to our CANedge CAN bus data loggers, our CANmod sensor-to-CAN modules and our free software/API tools:
Learn about CAN bus data logging:
• CANedge: CAN Bus Data ...
Learn about the CANedge and CANmod:
www.csselectronics.com/pages/...
1) CANedge1: www.csselectronics.com/produc...
2) CANedge2: www.csselectronics.com/produc...
3) CANedge3: www.csselectronics.com/produc...
4) CANmod.gps: www.csselectronics.com/produc...
5) CANmod.temp: www.csselectronics.com/produc...
6) CANmod.input: www.csselectronics.com/produc...
See also our full intros to practical data logging:
1) Blackbox logger: www.csselectronics.com/pages/...
2) OBD2 data logger: www.csselectronics.com/pages/...
3) J1939 data logger: www.csselectronics.com/pages/...
4) CANopen data logger: www.csselectronics.com/pages/...
5) CAN FD data logger: www.csselectronics.com/pages/...
6) LIN data logger: www.csselectronics.com/pages/...
For more tutorials, see our overview: www.csselectronics.com/pages/...
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ABOUT CSS ELECTRONICS
At CSS Electronics we specialize in simple-to-use, pro specs and interoperable CAN bus data loggers - like the CANedge and CANmod. The devices let you record raw data from e.g. cars, trucks, industrial machinery and other CAN based applications onto an 8-32 GB SD card. The devices are interoperable, meaning you can process the data in your favorite existing software - or use our 100% free and open source software/API tools.
Website: www.csselectronics.com
Products: www.csselectronics.com/pages/...
Software: www.csselectronics.com/pages/...
Case studies: www.csselectronics.com/pages/...
We offer 100% free technical sparring - contact us:
www.csselectronics.com/pages/... - วิทยาศาสตร์และเทคโนโลยี
![J1939 Explained - A Simple Intro [v1.0 | 2019]](http://i.ytimg.com/vi/LxtLiP9P6G0/mqdefault.jpg)
![J1939 Explained - A Simple Intro [v1.0 | 2019]](/img/tr.png)
![CAN Bus Explained - A Simple Intro [v2.0 | 2021] 🌟](http://i.ytimg.com/vi/oYps7vT708E/mqdefault.jpg)
► Check out our new v2.0 OBD2 intro! th-cam.com/video/YcwBeNQbJ5A/w-d-xo.html
I wish you'd tone down the distracting "music" in the background so I could hear you better.
We've done this in more recent intro videos - thanks for your inputs!
A very very informative introductory video for beginners. Thanks for the effort!
Excellent Video. Thank you so much for created it. Made everything understandable.
Excellent video, clear and concise, I didn't understand the relationship between can bus and OBD, I do now, thanks.
Amazing video! Cleared up so many doubts for me.
Great content, I liked the music in the background, it is not sleep inducing for me.
Hello. Thanks for the video. May i ask what type or which obd2 that is cheap enough and compatible with my toyota vios 2004?
Does elm type of obd2 is good enough? Or i need more expensive obd2 like Thinkdiag obd2?
Thank you!
Thank u sir information for DSG 6 speed and DSG 7 speed manual transmission
Too many mechanics now 'rely' on ECU data output. "There's no codes set, so there's nothing wrong with the vehicle." Bollocks! Do what your job title says. If all that was required was to read the codes, then anybody could do it. It's when the vehicle is acting up and the ECU isn't seeing a sensor fault that they need to get down and dirty to find the actual problem. Recently we had a starting issue. 6 mechanics read the computer and said there was nothing wrong with the car. Yet they all agreed that it was too hard to start. Eventually I started looking into it myself. We'd had a service done on it and one of the items changed was the in-tank fuel filter. I pulled the filter and low-and-behold, the pump pickup pipe 'o' ring seal was broken. It was damaged as the pump was slid into the new filter. It was allowing air to be sucked up, and that was the cause of the hard starting. And there's no sensor there, so the ECU couldn't see it. Mechanics, do your job! The computer should be just the first step (as opposed to the only one) in fixing the problem. If there's no codes, at least you know what the problem isn't. Now start looking elsewhere....
Yes Chris I agree. Not all faults are captured by OBD. It is upto OEM to decide which faults needs to be populated.
It's an interesting point Chris. It's definitely hard to remove the human interaction from the equation :-) at the same time, it'll be interesting to see how machine learning may play a role going forward. One could imagine that even if a single ECU is not present for a particular fault, the pattern across the other ECUs will correctly identify the error - backing up your case with data even when there's "none".
I went to college for automotive right out of high school back in "04" but decided a year and a half into the program that I only liked to work on my own vehicle so I quit and worked an unrelated field. 14 years later (9months ago) out of work and needing to do something I was offered an automotive job. I took it figuring something was better then nothing till something better to come along. In doing so I quickly realized that I again love it and actually would rather work on all vehicles but my own. Lol I don't know what changed my feeling about it probably just maturity and life experience. Being excited about working automotive again I quickly realized my desire to go back and finish my last half year of education. Moral of the story is back in "04" where I received the majority of my education obd2 was still a relatively new development and was thought of as a great aid in helping to diagnose. But a tool was all that it was no different then any other tool in the tool box. Now having gone back to school I have to agree with you that many/most think of a scantool as a solution with no consideration of how to proceed if the screen doesn't tell them exactly what to do next. They think of it as a scansolution instead of a scantool which is ridiculous because when such a tool exists their job will no longer be necessary. I'm sorry for your bad experience with a tech. Your story motivates me to continue learning and to have understanding of all systems and how they work (that's what brought me to this video) whether a computer tells me what's wrong or not in hope of never having a similar comment written about myself.
So true chris. In my opinion, mechanics should know the basics on engine operation before relying on scan tools.
I'm glad you fixed your problem yourself. If the technician whom looked at your vehicle was a certified A-Tech the first thing he would've looked at with a hard start would have been 1. Fuel Pressure; 2 Fuel Trim Data. According to what you stated that the O-ring Seal was broken and sucking in air would have created a fuel vapor in your fuel rail system leaning your Air Fuel Ratio significantly. You didn't mention the type of vehicle but If your vehicle uses a Oxygen Sensor Fuel Trim PID's would be traceable and if it uses a modern Air/Fuel Ration Sensor then it would've been even more precise. I'm sorry to hear that all of these techs weren't able to find your problem but I hope you truly took your vehicle to a certified tech. Also a vehicle sensor only points in the direction of a malfunction and because a check engine lamp may be on it does NOT deem the sensor at fault. A great example is a Oxygen Sensor may set the Service Engine Lamp but the sensor may be fully functional stating that your car could be running too lean or too rich and this is why it set, therefore the sensor did its job. I hope this helps in clarifying how OBDII data pids really help a tech even if the check engine lamp may not be on. A good note for all techs to check first is the freeze frame data to see when the event occurred. It gives valuable info such as speed, rpm, temperature, etc; I hope this helps.
can u help me with information plz.....what are are all the type of vehicle dat the obd 2 scan tools for on? cos am confuse by seeing obd2, eobd, ews, and so on...how many of this do we have ?
Is OBD2 ialso an engine ecu remapping to obtain the maximum output of the vehicle?
How can I read and process the OBD2 data into a microcontroller or Arduino board?
Thank you!
Can you please explain the CAN bus? I enjoyed your explanation. Thank You
where does it get its power from? and is there a fuse in the fuse box for it?
Hi,
Is there any resource from where I can get extended PIDs (mod 22) of all vehicles' manufacturers?
(I only need FUEL LEVEL, ODOMETER, VIN of all make/model)
Thanks
CSS Electronics Good Afternoon
Great tutorial thank you very much 👍
From Nick Ayivor from London England UK 🇬🇧
Nice video, very informational.But spa music is putting me to sleep. Upload again minus music ?
I felt asleep literally.
Damn true 😂 but really appreciated the info. 👏👏
Amazing video. It is really very helpful.
Why are most scanners that have bidirectional capabilities so expensive? Doesn't it work on the same standard? What is the device used in-between, say, a PC or tablet and the car? I get the gist of a reader, but a lot of bidirectional scan tools use a wireless module not much bigger than a standalone reader. What hardware is in this module that allows bidirectional capabilities?
what protocol is suitable for toyota vios 2012? (my OBD Konnwei903)
Between 5.00 and 5.15 mentions raw data? Is this data the conversation between nodes?
Sir where can I learn about obd2
Some vehicles require you to change a certain pin in the OBD2 connector in order to code read and acess real time data across certain car manufacturers like French Japanese and american ones
Good tip Tyrone, appreciated
You make wild engineers here, very good for business
My car does not have a High Temperature and Voltage guage. I an thinking of buying a ODB HUD (heads UP Display) to monitor the water temperature and status of the supply voltage whilce i a using the car
Is connecting this device permanently to the oBD 2 port safe for the car? or will it damage it?
thanks
Hello,
Thank you, most informative series...
I now understand much better OBD2, and can make a choice of scanner for my car..
also a 307 Peugeot.......!!
Cordialement,
Happy to help! :-)
I’d would like to learn how to control a simple node using OBD2 data (rpm). Is that possible? Or is that done via CAN instead?
So if I read and understand correctly, if I want to control a node it would have to be done via CAN... but can a Arduino PLC controller be used to read OBD2 to control a node?
Awesome video! Thank you! Would OBD2 scanners also work on newer motorcycles? Is there a way to hook up a scanner and read data?
I'm not sure if you'd be able to use a standard OBD2 scanner for most motorcycles, to my knowledge they're not required to support OBD2 in the way non-EV vehicles are. However, we've got plenty of two-wheeler users that record the raw CAN bus data from their motorcycles, e-scooters, e-bikes etc. - see e.g. our Case Studies section for a use case with Zero Motorcycles.
Great video and content!! but what a sad bg music
SUBSTANTIAL CSS ELECTRONICS
Tutorial great brilliant video thank you love it
CSS Electronics
From Nick Ayivor from London England UK 🇬🇧
Dear CSS Electronis, please can explain how OBD-II diagnostic can communicate or send PID into vehicle, when an Intrusion Detection System is installed? DBC and or all rules are provided by the OEM manufacture?
Thank you all to any response!
Can you clarify what you mean here? If the access to the CAN bus is blocked via the OBD2 connector, you'd basically need to hook into the CAN bus behind the OBD2 connector - though this is more cumbersome.
Hiii ...can anyone please explain , why they are adding exactly 40h value to the corresponding service in response ? Apart from standard , please explain why that particular value , if anyone know.. thanks.
can you help me to come to your country by sending me a Business Certificate to work there?plz
Where can i learn what type is my car's OBD. It's a GM Opel astra F 1992 1.4lt
It'll have an OBD1 system, since it's pre-1996, which is much less detailed than the system described here.
You'll probably have a hard time getting data from your vehicle. In our experience, even cars as recent as mid 2000s will have far less data than those from 2010-15+ when it comes to standard Mode 01 PIDs
OBD was not introduced until 1996 and newer
OBDII was not introduced before 1996!
If my vehicle has OBD2 port? Can it be read by OBD2 scanner regardless if it is a diesel or gasoline?
I mean any OBD2 scanner?
Yes, assuming that your car satisfies the requirements outlined in the video in terms of age etc. As outlined, not all cars support all OBD2 parameters - but you can request the Supported PID messages to get insight into e.g. which Mode 01 parameters are supported (if you're interested in e.g. vehicle speed, RPM etc.)
How about busses?? I plan to buy one but i dont know what scanner should i buy for my bus? The bus has 16 pins.
At times some mechanics can be blinded by all the data that's presented to them on a code reader. Causing them to over think the problem and miss the blatantly obvious issue that 90% of the time right in front of there eyes. Also Bear in mind tho that todays vehicles can be extremely complex to work on and diagnose faults on. Most people believe that it is simply a case of plugging a computer in and being told the fault. But alot of the time it really isn t that simple.
very informative. sadly background music too loud and very disturbing. can it be reduced please. thx
Why insisting on noisy background
What's the most elaborate android application for driving data?
ODB scanners costing thousands of dollars. And then, on top of that, is buying proprietary ODB definitions from the car manufacturers, from $5000 to $25000.
Isn't SAE, Society of Automotive Engineers not Standard?
3:10
Gostei da foto da Av Paulista
This is why I love carburetors. I'm lost.
😂🤣😂 I promise I was thinkin the samething!
Keep trying with it. All cars now have it and it is a good thing. This 'tutorial' is poor in that it does not introduce things properly. So forget this one, Try something else.
They don't want us fixing our own cars anymore. Half the time the OBD diagnostics give you the wrong info anyway.
How would I find the lowest cost scanner or module that would allow me to turn on and off modules such as close the canister valve and seal the evap system for testing? Thanks for your time.
Autel MaxiSys is a decent one for the money though the price range starts at $1250.00+ compared to a Snapon Verus retailing for $10,000.00. If you want to look at data other than just codes you will need a decent scanner. Nothing cheaper is fast enough to really catch the hickups in faults. Also try purchasing an oscilloscope to view waveforms and for injectors and coils as well a fuel RPM and more. Scopes are a must have now these days with OBD / CAN network PIDs
@Green Tea Thanks
Nice video introduction. Would be nice if there was a way to diable the very annoying background music.
the background music is very irritating, would it be possible to publish the video WITHOUT music?
Teach me how to make slide like this 🙇😃
Slides are easy. It's the excellent material covered in this video that's hard.
Thanks Geoff and K! :-)
Why the bloody music mate, oh god.
My guess is that, if the music were not there, you and I would never have found this video. That's why all these most popular videos have music. It keeps the part of the brain that says "I'm bored, change the channel" occupied a bit longer, which causes Google's algorithm to rate such videos higher. The same video without music would be better, of course, but we'd never even be allowed to find it.
To train you for pain
@@-taz- It worked reverse on me. I got sleepy because of the music ...
thanks bro but pls remove music
The background music was too much irritating
تشکر درود سپاس وهزاران لایک ممنونم بزرگوارمحترم اگه لطف کنین زیرنویس بزبان فارسی را اقدام نمایید ..ترجمه همه زبانها موجود است بجز فارسی منتظر پاسخ واقدام شما هستم 🙏🙏🙏👌👌👌💝💝💝😘😘
Could have skipped the ambient noise music if it were up to me. It's distracting and unnecessary.
Thanks for the feedback! We suggest checking out the v2.0 version of the video, which is a complete update incl. no music :-)
Is it just me or do all these videos sound like an automated voice is reading a script?
It isn't, but appreciate the feedback. If you have an example of a video where you think the voicing is more suitable for this type of thing let us know for inspiration
Obd2. P0430
There are screens on the car, and there are computers on the car. Why do you need special tools to access the codes? The car manufacturers just divide features into different MCUs and we can't use the center touch console to look at a simple error code. It's just utterly stupid.
This isn't too high level. You only need a few college degrees first.
RussNo1 or just take your time to learn it on the internet for free.
It's generic engineering info. And as such, well, doesn't help pinpoint what anyone would be looking at OBD DTCs for - to find and clear up errors/problems.
Sir useful video full of knowledge sir i am automobile technician i want some training about car electronic system OBD2 CAN BUS Ecm Pcm Abs Eps SRS how to communicate with the sensors i see your video i am very Exited i am from PAKISTAN doing job Saudi Arabia may call OR live chat THANKS
Yes, can you remove music please.
Thanks for the input, appreciated
Music is too distracting / loud
Good feedback, we'll turn it down a notch for our next videos!
Cut out the music. It makes a video which is an 11/10 a 4/10
Thanks for the feedback :-) we've adjusted this to remove the music in our more recent intros to CANopen, CAN FD and LIN bus. We'll consider creating an updated version of this video intro as well.
Are you speaking slowly on purpose?
Not everyone speaks English as their first language. Also, this is a technical explanation. Slower is always better.
Just say learn basics networking before watching this
It's very similar to MIBs, SNMP, etc., for internet networking equipment.
HFC! Loose the music!!!
I just plug the fuckin thing in and see what it says lol
What's with all the clattery noise in the background - is your brother a musician and you needed to find him a job?
Yes, that was exactly why we did it :-) jk, we've heard the feedback and will be changing this going forward
Why did you take a perfectly good, informative video and mess it up with that obnoxious soundtrack music? Three minutes was all I could take.
WOULD BE MUCH BETTER WITHOUT THE HORRIBLE BACKGROUND MUSIC
Thanks for the feedback Greg! :-)
A simple intro ? I don't think so
yes a very bad presentation due to overbearing music, the presenter obviously doesn't give a crap due to nothing being done about it in over 3 years, switched off after 1 minute and that included going down to see what other people had to say, not quite sure what the 2020 means, unless it means its been edited to improve it, if so then...... FAIL. certainly wont be subscribing to this one.
The 2020 refers to the article being updated recently. We'll consider revamping the video as well and will link to it here once ready. In the meanwhile, check out our intros to CANopen, CAN FD and LIN bus to check if that is more to your tastes - happy to hear any feedback on those
@@martinfalch4648 thanks for your reply, i checked those vid intros and the background music is good and whilst being heard is very unobtrusive, it could easily be played like that for the whole vid. the narration is very clear and informative, excellent educational vids for mechanics to engineers. look forward to watching more. regards Richard