11 th commandement by bernie thompson - in scope we trust 💪

Doing my usual pause & rewind,I noticed the high then low reference point ever 720 degrees @ around 9 to 10 mins. Just after that you explained the over sight while recording. But Bernie you are savage, I really do love your tutorials. I sometimes feel very small in comparison to you, but I'm delighted you decided to show that its ok to make a mistake. Your my Yoda

very well, excellent diagnostic Bernie

Bernie I know I'm a female! I watch all your videos and am impressed by your diagnostics and your brilliance!!!

Bernie you are a master of diagnostics. I hope to be as good as you one day! Keep up the great work and videos!

That's a crazy failure!! Scope to the rescue! No way to diagnose that one without a scope :)

Very interesting. I was sure we would find a bad ground. Amazing work as always. Your method is 100%

Bernie is the man no doubt about it. He even crawl underneath the car. All my respect for this working man 👍🇺🇸

This guy makes me question if I’m even a mechanic 😂😂 he’s seriously amazing at what he does

I need to attend a class alongside Bernie for a week! You are truly an inspiration to many inspiring techs such as myself and I’m sure thousands of others! Thanks for the videos and taking the time to make sure we that we are diagnosing our customers vehicles correctly!

I have a 2007 Jeep liberty. Two times this week I turned my vehicle off for about 5-10 minutes, then went to turn it back on. And it was wanting to stall out. It was pretty bad. But I managed to get it started by pushing excessively on the gas. This video made me think outside the box for possible part failures. Thank you for being so clear and understanding. Tomorrow morning I will take it up to Auto Zone for a scan for codes. Then over to the shop for a oil change and hopefully they can use the same scanner tool you have to figure out the problem. Thank you!

Great diagnosis. Shows that scope gives a big contribution to car diagnostics.

Pure gold Bernie. I really truly love your diagnostic process and aspire to master it as you have sir. Your teachings have helped me, and the shop I am entrusted to operate become successful. because of you I am able to comfortably provide for my family. Thank you Bernie.

I too love your approach.. figure it out.. don't fire the parts cannon. I hate replacing parts "just because it might be". Thanks for illustrating how diag should be done.

Thank you for another amazing video, Bernie. You preach about testing and let the results guide you to the next test and you're correct every single time. Thanks for being a great teacher!

Bernie is beyond genius I swear.

Watching his videoed convinced me to buy his equipment.

Master diagnostician! Great video. Learned a lot from you.

I will save or sell my Pico 4425a to get the ATS diagnostic kit but I think it is over my reach before I start; for now I will use my Pico to save up, etc. I like the combo here.

You are the best and truly dedicated to the solution and use exact an exact formula for the solution. I enjoy your presentation.

Brilliant logical approach I totally enjoy your videos best on KZfaq for us Tech's to aspire to brilliant

There still is definitely a correlation between the fan and the crank sensor, maybe the fact that the sensor was bad it was effected by any slight variance in current change... brilliant diagnosis thanks

As always Bernie you are master of diagnostics.

Bernie, wow what should i say AWESOME/BRILLIANT it really comes in the end to the power of the SCOPE and the information the scope will show you what is going on thank you sir really enjoyable to learn from the master.

Thank you, You bring us, the mechanics a lot of knowledge, I think never see a teacher like I have in my beginning but here you are, thanks again

Awesome! Still getting on the ground to get it done. That is great work. I look forward to the videos and keep em coming!

Brilliant as usual bernie. Thank you. Keep them coming

Interesting especially since the previous vehicle had a similar anomaly yet wasn't affected by it. Thanks!

Large electrical loads briefly loads the engine speed and consequently changes the engine cadence. Hall effect type systems are very sensitive to frequency changes and thus the change in engine cadence exposes a defective crank sensor. This is one of the reasons why I prefer Hall effect type systems over VRS systems, they are much more sensitive and simpler in design, to approach this level of resolution, GM uses two VRS sensors!? Despite the hate and lack of funding for development those Dodge boys can still compete with the best. I believe Chrysler could have implemented a filter for a small glitch like this but - why would anyone not want to know of an early impending failure?

You were able to see it quit. I've had intermittents that did something similar. Two 1997 GMC Mini vans with the 4.3L V6 engines over 100,000 miles on the first van, had the same intermittent stalling, usually on the road. It took a lot of driving with my old two channel scope and DMM ( it was over 15 years ago when I had these two intermittents) to find out it "could be" the ign module or ign coil. When the intermittent had shown itself, I finally had the scope positioned to show the computer timing output which was sent to the external ignition module. The module in turn toggled the Neg side of the ignition coil which then sent the spark through the distributor, the spark plug wires and the spark plugs. With the scope on "flight record," I saw when the engine stopped, the signal to the coil from the module stopped, but the engine took time to fully stop. During that ramp down time ( of the engine) the PCM was still sending the computer timing output ( 5 volt square wave) indicating the crank sensor was still sending the signal to the computer. Without the old Fluke 98 scope it would have been fire the parts cannon! As it was, the spark plug center electrodes were worn down to the insulator, the ignition wires were original, and possibly the ignition coil was stressed due to the worn out plugs. After replacing those parts, no more intermittent stalling.

Knowledge and skill on another level 🤯. I am trying to fully understand the process here, so it makes sense that you would collect data from the ignition coils and injectors as these are providing the engine with two of the three fundamental elements required for running (Fuel and Ignition) it also makes perfect sense why you looked at the cam/crank signals as these are the inputs used by the PCM to determine fuel and ignition timing. I guess what is key here is to look if the outputs (Injectors, Coils) cut out before the engine stops rotating. I presume if this was a bad fuel pump the outputs would keep operating until the engine stops. If you did not have an input issue like in your case study, where would you go next and why? Cheers, Adam.

sir.. awesome work ..i can only wish i had you near me..i have the same jeep ..with simular issues and for the life of me i can get it to do is Job... will need to get my hands on that os/ scope

Too many shops change parts as part of THEIR " diagnosis " . I would guess the alternator and computer cost about $ 1000.00 installed . The vehicle then does the exact SAME thing . I don't see how they get away with it . Lube Tech , maybe - if they use the correct fluids . Technician - definitely not . This is what happens when you use your BIG TOE instead of a scope .

My favorite diagbostician.

Great video Bernie! Thank you for clarifying he video.

Thanks Bernie! Great diagnosis as usual.

He's screaming at the end. Been there. Thank you.

Great Video. I wish I could get the training and the equipment to do this kind of work. I always enjoyed the trouble shooting when I worked on older cranes. I just missed the boat on the computer stuff.

Bernie you are the man do you have a text book series about scopes

How does turning on the AC affect the operation of a bad crank sensor? A bad crank sensor is going to be a bad crank sensor regardless of anything else is turned on or not. This sounded like a bad ground.

Wow! Still can’t wrap my head around how the electrical load was related to the sensor failure. I suppose it is just a coincidence. I was expecting a bad ground or battery.

Big thumbs up . Nice work

thanks Bernie! great capture like your channell

Man I learn a lot from you! Thanks for your vids!

I've never worked on a Jeep Liberty and I was thinking either crank sensor or cam sensor issue. The added electrical load is putting added stress on it.

Love the passion. I get the fustrating bit about shops guessing. I don't get it either. I'm not 100% perfect but if you prove what is wrong with logic/testing/data you'll be right 98% of the time. The other 2% you missed a step, didn't have the whole story, or overlooked something.

You are the best Bernie! Keep up the great work and Thanks for always sharing.

Fantastic explanation and diagnostics! Now all I need is a $cope.

Would love to be his apprentice!!

I LIKE THIS GUY AND I NEED TO HIRE HIM!!!!!!!!!!!!

Will it be cheaper to ship my 2006 3.5 dodge charger stalling issue to you or fly you to Texas?

I was thinking at some point in the troubleshooting that a probe would have been connected to the fan motor power to check for the coincidence between the failing cam sensor and the fan motor turning on. That might have helped decide sooner that the two were not related.

Many thanks again sir. God bless.

Why would anyone give this a thumbs down?

you have great passion for your work.

congratulations. RESPECT.

Do you need a scope? Yes, there would’ve been no other way to see that fault!

A computer and ALT was replaced my God😵 always check your wiring...

So the alternator and computer are free....right?...... or are you going to put the old ones back on....

Another great video from Ats thank you!!!!

Great diagnostic , excellent just excellent

I saw the issue right away, but didn't have a clue what caused it. Thought it was a poor ground, dropping out the sensor....

True, and thank you.

nice job

Good work Bernie !

thanks you Bernie this are real diagnostic

Wondering why it wouldn't activate the CKP CEL.

wicked video Bernie thanks

Have to get the escope

Nice description and explanation Thanks

Thanks for sharing Bernie... Cheers.

great content ❤️❤️

Who the hell would do a thumbs down this was a great video good job God bless

Awesome job. I love your videos.

Maybe I missed it, but what was the correlation between the signal not being held to ground long enough and the load on the charging system?

Well done another great video thanks

Hey, i needed ignition key just like that after my van burglarized 😆

Great job as always!

Excellent informed 👍x100

Good diagnostics, but this video made absolutely no sense.... How would the AC(blower motor/AC clutch) cause the crank sensor to fail at the exact same time that it was turned on?

Micro amp clamp the signal wire?

you can hear the frustration in his voice at the end....please guys test properly...dont be a parts changer

Crank position sensor , known fault

I love the ones that can't be proven without a scope!

Awesome

why did the fan control make it die

not explain how affect the load to the sensor

awesome thank you

Saludos desde Costa Rica kike de taller Pit Lane . Gracias por compartir .

can you help me own a waveforms books

Amazing

Thanks, that's true

Too easy for bernie A superstar showing The pee wees how to do a simple diagnosis ♦️♦️♦️

Thanks for back tracking, I saw the 2 high traces and wonder that cant be right. I take your diags as bible truth and you showed again that tho your human you still succeed

Deguass the sensor.

12th command by Bernie T- stop and slow down

Slam dunk again

What it shuts down only when ac or lights were turn on?

You get what you pay for. Lol

👍⭐⭐⭐⭐⭐🤓😎