Great job Ivan. Your field work was exactly what thousands of DIYers across the world are doing. Working with basic tools to troubleshoot problems themselves either out of sheer necessity or for the satisfaction of it. Well done sir and thanks!
Reference high and reference low on O2 sensors are inputs to a differential operational amplifier before it goes to A/D converter. Any noise on both wires is cancelled out by amp, kinda like twisted pair wires on ABS.
Nice to see you using the torque pro app I carry a reader in my car and it's been really handy it would be interesting to see how it graphs in comparison next to your verus. Whats the story with harness and attempted arson I wonder. I enjoyed the video👍
Great video man my wife is from Ukraine and I always asked about the car in Russia. thanks for finally show me some the technology overthere. By the way the 3 yellow lights that couldn't figure out most likely will the abs motor that isn't turn it. I had fix couple of them already. You can buy the motor or just replace the bushings little hard to find but it is worth it.
I always travel with a little scanner too. I tried torque a few years back but thought it was a bit too cobbled together to continue using or purchase. looks like it may have improved a bit though.
This reminds me I have one of those blue tooth scanners. Used it on my 98 Frontier. $159 Mass Air Flow Sensor later that thing is still running like a champ at 166k. Anyway I just bought 2016 Frontier Pro4X. I got a little over 1,000miles on it. I should plug that in and get any useful info I can get while it is still new..
oh sorry one more thing what is a good downstream o2 wave suppose to look like sorry to keep bothering you but your the only one that answers me and I'm so eager to learn I really love it when you get something that Noone could figure out and it leaves you running like a new car it's awesome hard to explain the feeling
Just as with a catalytic converter- I have seen a "poisoned" O2 sensor before, from prolonged exposure to a rich mixture and low octane fuel. The condition will make it "lazy".
excellent video. I did not see it on the wiring diagram. Where did you get the 100 ohm resistance info from? I would have assumed a ground to ECM problem.
thanks crazy I was just watching you with south main auto at etcg meet up the problem is the customer don't have alot of money and I don't have alot of scan tool capability but anyways I really appreciate your help I have a small shop in Brecksville ohio I started with mainly grunt work now I'm doing things I never thought i could do my next purchase is a snap on verus edge so I can do more dignostic work I'm trying to save but it seems everyday a new tool comes out
O2 sensors and their circuits inside the PCM are "special". The sensor actually "sources" a very small voltage. To more accurately read this small voltage, it feed into an op amp. To more accurately read the voltage they use a differential op amp. The voltage divider circuit that proceeds the negative input of the op amp is limiting the current to a very small amount (
Cool! Can you draw up a quick basic schematic of the circuit? I always assumed the sensor "negative" was just a plain ground...maybe I was way off on that assumption lol
Google "O2 sensor circuit" and then click "Images" for some samples. Any sensor that "sources" its own signal (not using Vref) SHOULD be treated this way. This ks even more important these days with the new style sensor that give a continuous, analog voltage output.
his car has to have some weird electrical gremlins as its one of the FIRST W163s with the M112 engines the 26th to be exact lol i have met the 137th and i wont forget that car lol
do you think the old o2's was causing the stft to be at 20%? i am stumped on why i have 20% Ltft on vehicle that runs perfect with no codes, just high long term #'s, maybe worn o2's?
So after you figured out that all the wires had continuity and the sensors were grounded what made you come to the determination that the O2 sensors were bad? The signal pattern on the scope?
it's really weird that both O2 noses would be bad before their heater circuit broke. I guess they were replaced once by the wrong parts by someone who did not know to test the heater power harness.
So, if I got this right, bank 1 sensor 1 supposed to go rich lean rich lean. Then bank 1 sensor 2 should stay around like 6 or 7 it should not act like sensor 1? So then it’s either the o2 or the cat is bad, correct?
Was'nt the fire started during the winter in Siberia, to warm the oil in the oil pan?! It is common overthere as you know. Anyway nice diag. in the field.
No not quite. The fire starting is more so a heavy-equipment diesel engine sort of a thing, and reserved for more remote northern reaches of Siberia. In this case it truly was an act of vandalism!
Haven't heard from the guy...he's actually been driving it like that for the last 4 years so I think he won't be too worried until it stops running completely ha
wow ivan good case study of o2 diagnostics i guess a lazy signal can set a heater code kinda like a crank signal problem can set a cam sensor code like i said before if you take the time to do a paid channel and really go into these harder to master diagnostics and explain these processes like this i would happily pay like i do scanner danner for his premium channel i have quite a ways to go thank you from america lol
If you are looking for something better than Torque, I suggest you check out BlueDriver. Available on Amazon. Besides, I would like to see you or your buddy Eric do a review on it.
i also use that android app,, torque pro... i assume u are using a full version ofmthe apps... u actually are able to check the o2 sensor by using the graphing, more accurate measurement there... and the response is much faster if u understand what i mean...
May be you can help I've asked the heavy hitters on you tube no answer I have a 2010 kia soul it has 65k and what's happening is the customer came to me and said that the car is losing power on the highway so I took it it for a test drive and noticed right away upon deceleration the car has a miss or putter feel really quick at right around 2000rpms it happens in park or drive I also noticed with a quick throttle snap car makes a backfire sound now my findings it has a exhaust leak at the flex tube there's no codes 02 is perfect fuel trims great no miss fire could it just be the exhaust system causing that because I can't find anything else wrong
can you help me with one more thing understanding amps I understand how everything works but this might sound dumb I don't get how a device knows how much amps to use so if you have I light that uses 1 amp and you replace that light bulb with a 2amp light this is just for exp. how does that work because the wire stayed the same and voltage let's say restiance changes but that just slows it down right. that's the only thing that gets me about the whole circuit also not good on using a scope I love working on cars it's my life and hobby.
You will find your answer in Ohm's Law: V = I*R. Watch my review on the LoadPro, there's a lot of good info and applications on Ohm's Law in that vid :)
Ivan younggun again thanks so much for everything can you do a video on how to use a scope for beginners or point me in the right way scanner danner has one but not really good for true begins but I'm going to watch that video on omhs now thanks bud you've been a true help
sure no problem! Once you get a good grasp of basic electrical theory, using a meter or scope becomes second nature, as you will know what you're looking for on the traces. The best way to learn is to do hands-on experiments and taking notes like a real scientist...it's fun! :)
No I don't have a scope I was looking at the hantec 1008 it's really cheap but the real reason is it sets the scope up for you so if you tap on injector pulse it already has every thing set up because I'm really lilliterate on a scope I think it's around 170 do you have any thoughts I'm just tired of buying junk but I really need to get this scope thing down before I move forward
Scope auto settings can be helpful, but the waveform won't mean much unless you understand why it looks the way it does. Doesn't really matter which scope you start with, but knowing at least the basics of the electrical theory is crucial to use it effectively.
Thanks for generously sharing your knowledge 👍🇬🇧
Great job Ivan. Your field work was exactly what thousands of DIYers across the world are doing. Working with basic tools to troubleshoot problems themselves either out of sheer necessity or for the satisfaction of it. Well done sir and thanks!
Thanks! Wish I could have gone a little further with this Mercedes, but did what I could...
Great job with minimal resources. You've got a great foundation of knowledge and that is the most important part.
pine hollow. world wide!!! Glad your back safe& sound.
Same here ! Although, with his Verus and a few other tools and access to parts, Ivan could probably make a good living over there !
That’s where he was born..
Reference high and reference low on O2 sensors are inputs to a differential operational amplifier before it goes to A/D converter. Any noise on both wires is cancelled out by amp, kinda like twisted pair wires on ABS.
Nice repair & diagnostics Ivan but that Benz has some issues. Glad you're back safe & sound!
Nice to see you using the torque pro app I carry a reader in my car and it's been really handy it would be interesting to see how it graphs in comparison next to your verus.
Whats the story with harness and attempted arson I wonder.
I enjoyed the video👍
awesome that you used you Torque pro since that is the only diagnostic scan tool since im a diy. glad to see it can be trusted since you are using it.
Great video man my wife is from Ukraine and I always asked about the car in Russia. thanks for finally show me some the technology overthere. By the way the 3 yellow lights that couldn't figure out most likely will the abs motor that isn't turn it. I had fix couple of them already. You can buy the motor or just replace the bushings little hard to find but it is worth it.
I always travel with a little scanner too. I tried torque a few years back but thought it was a bit too cobbled together to continue using or purchase. looks like it may have improved a bit though.
Way to think things through!
I like the shelves above the over head doors!
Nice work Ivan with working with what you have on hand for tools.
Glad to see you back great job as always
Wow! A little rough in Russia!! 🔥🚗 😂
This reminds me I have one of those blue tooth scanners. Used it on my 98 Frontier. $159 Mass Air Flow Sensor later that thing is still running like a champ at 166k. Anyway I just bought 2016 Frontier Pro4X. I got a little over 1,000miles on it. I should plug that in and get any useful info I can get while it is still new..
oh sorry one more thing what is a good downstream o2 wave suppose to look like sorry to keep bothering you but your the only one that answers me and I'm so eager to learn I really love it when you get something that Noone could figure out and it leaves you running like a new car it's awesome hard to explain the feeling
Very nice work with limited tools!
Interesting case Ivan. I'm looking for that torque app now. perfect for us DIY'ers.
I'll bet the dash cam works ok, though!
thanks Ivan, explained perfectly
good work Ivan
Just as with a catalytic converter- I have seen a "poisoned" O2 sensor before, from prolonged exposure to a rich mixture and low octane fuel. The condition will make it "lazy".
Fire you say, Ivan you can't even go on vacation without touching a car.lol. Love it
Good job on fixing ML 320 ,,,,getting diagram on a car u have to locate a site and sign up........
excellent video. I did not see it on the wiring diagram. Where did you get the 100 ohm resistance info from? I would have assumed a ground to ECM problem.
Can you please send a link to where you get your wiring diagrams, I am always looking for some!! Thanks!!!
great video ivan just wondering if MB intentally floated the ground like Chrysler and Volvo thanks for sharing
thanks crazy I was just watching you with south main auto at etcg meet up the problem is the customer don't have alot of money and I don't have alot of scan tool capability but anyways I really appreciate your help I have a small shop in Brecksville ohio I started with mainly grunt work now I'm doing things I never thought i could do my next purchase is a snap on verus edge so I can do more dignostic work I'm trying to save but it seems everyday a new tool comes out
Verus Edge?!? You could buy like 10 nice used Verus or Verus Pros for the price of a new Edge...save your $$!!
100% agree Ivan!
TorquePro actually has more features than the free version?
O2 sensors and their circuits inside the PCM are "special". The sensor actually "sources" a very small voltage. To more accurately read this small voltage, it feed into an op amp. To more accurately read the voltage they use a differential op amp.
The voltage divider circuit that proceeds the negative input of the op amp is limiting the current to a very small amount (
Cool! Can you draw up a quick basic schematic of the circuit? I always assumed the sensor "negative" was just a plain ground...maybe I was way off on that assumption lol
Google "O2 sensor circuit" and then click "Images" for some samples.
Any sensor that "sources" its own signal (not using Vref) SHOULD be treated this way. This ks even more important these days with the new style sensor that give a continuous, analog voltage output.
his car has to have some weird electrical gremlins as its one of the FIRST W163s with the M112 engines the 26th to be exact lol i have met the 137th and i wont forget that car lol
do you think the old o2's was causing the stft to be at 20%? i am stumped on why i have 20% Ltft on vehicle that runs perfect with no codes, just high long term #'s, maybe worn o2's?
A lot of causes for high LTFT...also depends if they improve under load.
it does go down under load, but just curios why that mercedes was at 20%
I thought that is an indication of a vacuum leak because the 20% came down to about 5 when revving the engine.
Ivan, is Torque pro better then free version what more does it do, I bought a genuine BAFX which is a start, thank you.
So after you figured out that all the wires had continuity and the sensors were grounded what made you come to the determination that the O2 sensors were bad? The signal pattern on the scope?
slow response on signal.. an o2 sensor should be able to have a frequence of ca 1hz
it's really weird that both O2 noses would be bad before their heater circuit broke.
I guess they were replaced once by the wrong parts by someone who did not know to test the heater power harness.
You should label your oxygen sensor banks PS (passenger side) and DS (driver side) to eliminate confusion.
So, if I got this right, bank 1 sensor 1 supposed to go rich lean rich lean. Then bank 1 sensor 2 should stay around like 6 or 7 it should not act like sensor 1? So then it’s either the o2 or the cat is bad, correct?
Was'nt the fire started during the winter in Siberia, to warm the oil in the oil pan?! It is common overthere as you know.
Anyway nice diag. in the field.
No not quite. The fire starting is more so a heavy-equipment diesel engine sort of a thing, and reserved for more remote northern reaches of Siberia.
In this case it truly was an act of vandalism!
So I asume it is your car. Try to get a Heavy Duty Headlamp restore kit from Meguiar's and polish the lenses, it will make THE difference at night.
No this is a family friend's car, I'm Ivan's younger brother. Good tip though!
Was it really 39C outside there? Damn that's hot.
"Someone tried to set fire to this car..."
LOL
ahhhh those Russians ..
Well, did they change the sensors and did it fix the problems? What's the word from the old country?
Haven't heard from the guy...he's actually been driving it like that for the last 4 years so I think he won't be too worried until it stops running completely ha
wow ivan good case study of o2 diagnostics i guess a lazy signal can set a heater code kinda like a crank signal problem can set a cam sensor code like i said before if you take the time to do a paid channel and really go into these harder to master diagnostics and explain these processes like this i would happily pay like i do scanner danner for his premium channel i have quite a ways to go thank you from america lol
If you are looking for something better than Torque, I suggest you check out BlueDriver. Available on Amazon. Besides, I would like to see you or your buddy Eric do a review on it.
i also use that android app,, torque pro... i assume u are using a full version ofmthe apps... u actually are able to check the o2 sensor by using the graphing, more accurate measurement there... and the response is much faster if u understand what i mean...
u can see the menu at 1:22 on the left below is a graphing icon.. just sets to cubicle graph and set the sensors axis, looks for the o2 sensors
May be you can help I've asked the heavy hitters on you tube no answer I have a 2010 kia soul it has 65k and what's happening is the customer came to me and said that the car is losing power on the highway so I took it it for a test drive and noticed right away upon deceleration the car has a miss or putter feel really quick at right around 2000rpms it happens in park or drive I also noticed with a quick throttle snap car makes a backfire sound now my findings it has a exhaust leak at the flex tube there's no codes 02 is perfect fuel trims great no miss fire could it just be the exhaust system causing that because I can't find anything else wrong
Well first fix what you know is wrong and go from there. Exhaust leaks upstream of O2 sensors can definitely have an impact on driveability!
Which OBD-bluetooth adapter do you use?
ELM327, got it on Ebay. However, they do have clones out there that DO NOT work...buyer beware.
motoYam82 ll
so in your opinion let say you personally can buy a verus pro, autel the new 1, the launch or the verus what would you pick
Verus Pro if you don't already have a scope.
Wow !
good job !
next time tell customer to go in the house and have. a bowl of bortsch .....lol
what app or obd 2 is that
someone send me a link
can you help me with one more thing understanding amps I understand how everything works but this might sound dumb I don't get how a device knows how much amps to use so if you have I light that uses 1 amp and you replace that light bulb with a 2amp light this is just for exp. how does that work because the wire stayed the same and voltage let's say restiance changes but that just slows it down right. that's the only thing that gets me about the whole circuit also not good on using a scope I love working on cars it's my life and hobby.
You will find your answer in Ohm's Law: V = I*R. Watch my review on the LoadPro, there's a lot of good info and applications on Ohm's Law in that vid :)
what program use to diagrams?
Torque Pro. It's in the Google Play store for 5 USD. They have a free version too.
Ivan younggun again thanks so much for everything can you do a video on how to use a scope for beginners or point me in the right way scanner danner has one but not really good for true begins but I'm going to watch that video on omhs now thanks bud you've been a true help
sure no problem! Once you get a good grasp of basic electrical theory, using a meter or scope becomes second nature, as you will know what you're looking for on the traces. The best way to learn is to do hands-on experiments and taking notes like a real scientist...it's fun! :)
No I don't have a scope I was looking at the hantec 1008 it's really cheap but the real reason is it sets the scope up for you so if you tap on injector pulse it already has every thing set up because I'm really lilliterate on a scope I think it's around 170 do you have any thoughts I'm just tired of buying junk but I really need to get this scope thing down before I move forward
Scope auto settings can be helpful, but the waveform won't mean much unless you understand why it looks the way it does. Doesn't really matter which scope you start with, but knowing at least the basics of the electrical theory is crucial to use it effectively.
You keep misspelling "signal"
When the short term is high during idle (+ number) but goes down as the engine rpm is high, you have a vacuum leak.
But then why does it go back down on its own? Vacuum leaks generally don't fix themselves unless...
Pine Hollow Auto Diagnostics Unless you have a clogged fuel filter Ivan!!! 😂😂😂😂😂😂
did the customer have to pay extra. for airfare meals and hotels ? LOL
3.2 L
Doesn't know how to say 'torque" apparently...
Here, this may help: torque |tôrk|
i know a guy from new york he says torwk