My house always breaks into laughter because they know what I'm watching on certain videos. I can't help but say, "hello, how y'all doing today?", hahaha. Just happy to see a video and the opportunity to learn from the tippy top!
Excellent video, scope shutting down with dtc set is a great idea. This should be in every dealership too. First time i ever saw something this easy to diagnose. Bernie we are not engineers so to think like one well you have to have that mindset. I know I don't and 99% of the watching do not have that ability either. That scope is awesome too bad for us retired techs it is not affordable to have in our garage. Any time I replace any mas sensor it has to be OEM new or reman by them or the maker of said sensor reman. If the part is made by denso, bosch their remans in aftermarket I never had problems with and doesn't have the dealership added cost either.
Anytime I get a check engine light, I ALWAYS go straight to freeze frame and print/save before doing anything else. It would show you how to drive the car on your test drive.
Great video, and let me please add one more thing: if you have to replace sensors, always go for the original stuff don't waste your time and money on aftermarket s**t.
damn aftermarket reman mafs, nothing but trouble. its to bad folks install them, then hang more parts trying to fix it. If only they got out the scope to really understand why the dtc was setting in the 1st place. Good thing this guy stopped that process & called Bernie!
Thanks for posting. It also comes down to sampling rates. Scan tools are limited. DSO scopes generally have in the order of 1Ghz per second. Nice to see you are back at it.
Bernie is such a badass, so great to watch him work. You gotta diagnose these cars . You might get lucky 80% of the timr hanging parts but what are you going to do when the 3rd or 5th part still doesn't fix itt? Such an amazing tool, I cant wait untill it gets to our shop!
This guy is the shit. Sometimes i wish i didnt have all the gravy to focus on my diangnostic skills. When i run into a problem car i tend to bounce around and waste time... t
At first he said (1min 20 sec ) cannot be the sensor and at the end it's a brand new oem gm sensor so 4 sensors in total to get rid of this problem , you must understand now we have very crapy parts outthere and it's costly to repairs cars today and time consuming for the shops and customers..
I think, after the covid, all the companies, drop the quality of their products. That's what I have noticed. Even reputable companies (maybe less than the others).
The read continuous feature was actually critical in making this diagnosis successfully. One would not be tipped off to the fact that the startup latency is causing the code if the scope did not stop, because there would be no way for the diagnostician to know that's the moment the code is actually setting.
I can relate to your troubleshooting steps. I had to troubleshoot large printers that had computer programs controlling how they played down the ink droplets to obtain high resolution prints. Sometimes you have to understand how the programs were coded to troubleshoot properly. I used to say, OK what do I need to make this thing happy. If you don't know how the the program is written you will never be a good troubleshooter. Love your videos!
I love it! Bernie is a genius and a comedian in one package. “If you want to make love to a car and stroke it, drive it around with a scan tool; it f you want to fix a car fast get a scope.” Haha! Dead!
I connected my Escan to my Silverado, and before I could perform any tests, it spoke to me saying, Overcharging, charging normal, overcharging, charging normal..." I thought, "Why is it telling me this if the battery cranks good and tests good. And the gauge indicates 14.1v.?" I turned ON the AC and suddenly the gauge dropped to battery voltage, which was 12.1v. I don't know why the alternator failed suddenly, but what I do know is that the original owner had a powerful stereo and didn't upgrade the alternator and he also sprayed a lot of awesome to clean the engine compartment and didn't cover the alternator. I just bought this Silverado a few days ago. Turning the AC and powerful stereo system on at the same time most likely killed the alternator. It has 141k miles.
2 main questions for me: 1: how did you know that the sensor pulling down the 5V Ref. to GND and not an internal oscillator from the ECU generates the base frequency after some time and the sensor only changes the frequency? 2: what leads you to the idea to check the delay after power on the ignition? Very good work, i watch you from switzerland :)
#2 I think I can answer for you. He did not have the idea to check the delay until when the freeze frame happened right at startup when the code set, which narrowed the search immediatley- he did not have to drive the vehicle to set the code. Thinking like an engineer and code set conditions, if the frequency was below a certain rate at the beginning of startup when the Crank position did indicate engine running, well, there is a problem so the DTC popped. So he figured out the code set condition and that the sensor was not reacting appropriately. Then he applied some well founded bias that a non OE part is too blame, which also lined up with the vehicles history of three aftermarket MAF's installed.
If you're referring to the MAF signal (yellow trace), it's oscillating between 5V and 0V with the engine running. That's normal with this style of digital MAF sensor.
@@abdul-kabiralegbe5660 I did not understand the 2.6 reading on the scope yellow trace then I realized The setting was on dmm and was averaging the minimum and maximum of the switching signal now I understand 👍
9.20 to 9.40 of the video the yellow was in the 5 volt ref signal wire when he looked to see if he had a connect with the probe yellow was reading 2.5 2.6 It should have been 5 volts Ecm pulls it to ground ????? 😲 Hz?
With a new factory part available why would the mechanic install aftermarket parts? A brain scan on that mechanic would probably show U:3000:96 and P0601, time to replace his brain, and don't use an aftermarket one.
It pays to know the different ways the same design problem is solved by engineers in various brands. That being said, the reason for having a known good waveform is so those who work on all makes and models can know WHICH one solution out of the many possibilities was used by the guys in the design department.
Bernie figured it out just by looking at the waveform I guess his background in design and development and 30 years a shop owner helps and probably uses a known good now and then good point 👍
What you proved is the state of NY is liable if they don't put an inspection sticker on the car since it is operating properly. Sensor just needs to warm up when the car starts.
And WHAT do they tell the customer AFTER the ECM is changed " ? " We KNEW the ECM was bad . It was worn out . Like tires , there's a slot where you stick the penny . We couldn't see Lincoln's head " ! 😄😄😄😄😄😄😄
Yeah Bernie is Back!!
Easy to follow!
The man, the myth, the legend
B. T. , The Best of the Best! 👍
Finally, I need my dose of to tier diagnosis
Thanks Bernie. I was taught test do not guess. Glad you are back. Keep on a posting.
"I don't want to stroke it and make love to it, I just want to fix it" -Bennie
about the only time I wanted to comment on a Bernnie Vid for the same reason.... glad you said it first lol. 👍
Legend 😎
if you don't want to make love to it,then, just f@ck it 😇
Wow! Scope shutting down with dtc set is a great idea. Takes you right to the problem.
Agreed! It's like a graphed freeze frame. That's an awesome feature. Bernie is a diagnostic elite - above all others.
My house always breaks into laughter because they know what I'm watching on certain videos.
I can't help but say, "hello, how y'all doing today?", hahaha.
Just happy to see a video and the opportunity to learn from the tippy top!
THE BEST intro ever
Great to see Bernie post another video. once again Bernie demonstrates the power of the scope! Thank you Bernie!!!
My Escan is getting delivered tomorrow. This video makes me soy exited to get it.
Excellent video, scope shutting down with dtc set is a great idea. This should be in every dealership too. First time i ever saw something this easy to diagnose. Bernie we are not engineers so to think like one well you have to have that mindset. I know I don't and 99% of the watching do not have that ability either. That scope is awesome too bad for us retired techs it is not affordable to have in our garage. Any time I replace any mas sensor it has to be OEM new or reman by them or the maker of said sensor reman. If the part is made by denso, bosch their remans in aftermarket I never had problems with and doesn't have the dealership added cost either.
The legend is back. Thanks again for the video
Anytime I get a check engine light, I ALWAYS go straight to freeze frame and print/save before doing anything else. It would show you how to drive the car on your test drive.
Thanks for a master class lesson. The scan tool reports correctly but rubbish part fitted.
Bernie is amazing. The tool was a massive advantage having the scope stop as soon as the dtc was flagged. I wish i had that.
Thanks for sharing Sir😍
Always an honor to learn from you👍🏻
Excellent teacher Bernie, and the ATS scope is the best. 👌
The goat in the automotive industry. Like a fish in water
Experience diagnosis master nice video
Great video, and let me please add one more thing: if you have to replace sensors, always go for the original stuff don't waste your time and money on aftermarket s**t.
Glad to have your videos again
damn aftermarket reman mafs, nothing but trouble. its to bad folks install them, then hang more parts trying to fix it. If only they got out the scope to really understand why the dtc was setting in the 1st place. Good thing this guy stopped that process & called Bernie!
Great to see Bernie
This was a good fix A perfectly running truck with just the check engine light on This is advanced diagnostics
Very Good Thanks for sharing the fact that when sets code stops the scope great feature
Thanks Bernie for posting another awesome video. Always waiting to watch your videos and diagnostic strategy.
The man the myth the legend
Nice job Bernie! You're the man! Also,, loved the analogies.
Hi Bernie. Thanks a lot …You are amazing as always. I love your videos…so informative
Never fails to impress me man 😊😊
Thanks for posting. It also comes down to sampling rates. Scan tools are limited. DSO scopes generally have in the order of 1Ghz per second. Nice to see you are back at it.
Bernie is such a badass, so great to watch him work. You gotta diagnose these cars . You might get lucky 80% of the timr hanging parts but what are you going to do when the 3rd or 5th part still doesn't fix itt? Such an amazing tool, I cant wait untill it gets to our shop!
That's better than min/max on DMM's and flight record on older scopes.
I hope Pico's watching.
Thanks Bernie.
Excellent diag! Hopefully one day I can get me some ATS tools.
Very compelling to use a scope. Great work.
I wonder if P0102 was the original code before they replaced the first MAF Sensor. I bet it was a different code. Great video!
El mejor diacnosta para mi saludos Sr ATS
This guy is the shit. Sometimes i wish i didnt have all the gravy to focus on my diangnostic skills. When i run into a problem car i tend to bounce around and waste time... t
Very impressive.
Great work Bernie! Thanks for sharing
Thank god for uncle Bernie
At first he said (1min 20 sec ) cannot be the sensor and at the end it's a brand new oem gm sensor so 4 sensors in total to get rid of this problem , you must understand now we have very crapy parts outthere and it's costly to repairs cars today and time consuming for the shops and customers..
Same here in the UK
I think, after the covid, all the companies, drop the quality of their products. That's what I have noticed. Even reputable companies (maybe less than the others).
Thank you Bernie 😊
That’s great info to know about having to many pids open at once on your scan tool! Good info as always!
But this is basic knowledge about OBD2. More parameters you read at once, slower the update is.
And it's always way slower than real oscilloscope.
Awesome as always Bernie , good job , thanks
Sweet tool, sweet guidance. Thx.
Bernie is King.👑
Nice 👍🏼 !!! Yup - definitely had fun learning with ‘ya ! Thank you mate ! 👊🏼
The read continuous feature was actually critical in making this diagnosis successfully. One would not be tipped off to the fact that the startup latency is causing the code if the scope did not stop, because there would be no way for the diagnostician to know that's the moment the code is actually setting.
So good ! Its simple when you just look at the data
I can relate to your troubleshooting steps. I had to troubleshoot large printers that had computer programs controlling how they played down the ink droplets to obtain high resolution prints. Sometimes you have to understand how the programs were coded to troubleshoot properly. I used to say, OK what do I need to make this thing happy. If you don't know how the the program is written you will never be a good troubleshooter. Love your videos!
Thanks Mr Bernie
Another awesome diag!
Thanks Bernie for sharing
I love it! Bernie is a genius and a comedian in one package. “If you want to make love to a car and stroke it, drive it around with a scan tool; it f you want to fix a car fast get a scope.” Haha! Dead!
Great work here, thanks for the explanation.
I connected my Escan to my Silverado, and before I could perform any tests, it spoke to me saying, Overcharging, charging normal, overcharging, charging normal..." I thought, "Why is it telling me this if the battery cranks good and tests good. And the gauge indicates 14.1v.?" I turned ON the AC and suddenly the gauge dropped to battery voltage, which was 12.1v. I don't know why the alternator failed suddenly, but what I do know is that the original owner had a powerful stereo and didn't upgrade the alternator and he also sprayed a lot of awesome to clean the engine compartment and didn't cover the alternator. I just bought this Silverado a few days ago. Turning the AC and powerful stereo system on at the same time most likely killed the alternator. It has 141k miles.
i love your scanner and scop the only problem is you dont have bi directional or active test
please do something sir thanks
Would adding a engine speed data have helped with the scan tool?
Finally made a video
2 main questions for me:
1: how did you know that the sensor pulling down the 5V Ref. to GND and not an internal oscillator from the ECU generates the base frequency after some time and the sensor only changes the frequency?
2: what leads you to the idea to check the delay after power on the ignition?
Very good work, i watch you from switzerland :)
#2 I think I can answer for you.
He did not have the idea to check the delay until when the freeze frame happened right at startup when the code set, which narrowed the search immediatley- he did not have to drive the vehicle to set the code.
Thinking like an engineer and code set conditions, if the frequency was below a certain rate at the beginning of startup when the Crank position did indicate engine running, well, there is a problem so the DTC popped. So he figured out the code set condition and that the sensor was not reacting appropriately. Then he applied some well founded bias that a non OE part is too blame, which also lined up with the vehicles history of three aftermarket MAF's installed.
( at 16:55 ) you deleted the code while the engine running it doesnt affect the pcm ??
Woww. Thank you sir
Hitman appearance 😂
The moral of story is after diagnosis, only OEM new parts endo of story.
Awesome
"I don't want stroke it ...😅 only with that sentence you can Tell Bernie is a Mechanic with tons of Experience 😅
You are the man ats is in my future
Great info thank you.
Wish I could afford that scope its a grnius of a design
Don't stroke the car ! :)...Great job Bernie
Thanks! 🚙
Wouldn't " freeze frame" tell u the conditions for code pop up. ??
Thanks for sharing
We’re the others GM sensors?
Love me some ats content.
9.40 to 10.05 of the video
The next screen shows 5 volts on the yellow?
If you're referring to the MAF signal (yellow trace), it's oscillating between 5V and 0V with the engine running. That's normal with this style of digital MAF sensor.
@@abdul-kabiralegbe5660 I did not understand the 2.6 reading on the scope yellow trace then I realized
The setting was on dmm and was averaging the minimum and maximum of the switching signal now I understand 👍
Good video
Cool Bernie
Wow Bernie could use me in the shop I would of had that little car out of there in 5 min while talking on the phone to my old lady
👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍
9.20 to 9.40 of the video the yellow was in the 5 volt ref signal wire when he looked to see if he had a connect with the probe yellow was reading 2.5 2.6
It should have been 5 volts
Ecm pulls it to ground ????? 😲 Hz?
The yellow channel is on the signal wire. MAF will pulse to ground with koeo or running..
With a new factory part available why would the mechanic install aftermarket parts?
A brain scan on that mechanic would probably show U:3000:96 and P0601, time to replace his brain, and don't use an aftermarket one.
The best
You don't need a known good just think like an engineer bernie is no doubt data driving diagnostics. 👍🇺🇸♦️♦️♦️smart with common sense 👍😁
It pays to know the different ways the same design problem is solved by engineers in various brands. That being said, the reason for having a known good waveform is so those who work on all makes and models can know WHICH one solution out of the many possibilities was used by the guys in the design department.
Bernie figured it out just by looking at the waveform I guess his background in design and development and 30 years a shop owner helps and probably uses a known good now and then good point 👍
What you proved is the state of NY is liable if they don't put an inspection sticker on the car since it is operating properly. Sensor just needs to warm up when the car starts.
Good day today new video
And WHAT do they tell the customer AFTER the ECM is changed " ? " We KNEW the ECM was bad . It was worn out . Like tires , there's a slot where you stick the penny . We couldn't see Lincoln's head " ! 😄😄😄😄😄😄😄
🤡 min max 2.6 I get it
Nice scope ats 🤣🎓
Baud rate.
Definitely top notch!