Electron John - you are surely and ACE Diagnostic Technician and certainly and ACE electronic technician who can quickly diagnose engine performance problems from waveform analysis of your signals. Thank you for sharing your vast diagnostic knowledge 🙂. Nothing under the hood scares me from trying to troubleshoot and repair my own vehicles. I have some electronic training and understanding of ac , dc physics. That being said , performing voltage drop testing and sensor signal testing / waveform analysis on automobiles is new to me BUT. I have an AUTEL bidirectional analyzer MS906BT - YOUR VIDEOS are simply fantastic - AGAIN - many thanks 👍 and HAPPY NEW YEAR ✌️🥂

Will this work with the bt 508

thank for the video, just bought the UltraEv. they didnt give me the motortru for a year though. otherwise great scanner

There was a OBD1.5 used by GM. My 94 z28 will not scan on OBD/OBD1 pin connector is for OBD1. Jumping pins on plug will not give code on the CHECK engine light on dash.

Thanks for the upload. Just bought an Ultra and started using it this week. Coming from a 906BT.

Very VERY BENEFICIAL ! Thanks ! 👊🏼 🔥 💻 📈 🔑

Excellent video. Great refresher👍

Much better looking scanner than the @harborfrieght T8 I wasted my money on.

If I'm not mistaken I have seen a Rotkee MT Pro scope on your workshop shelve. What is your experience with it for automative diagnosis?

Thanks for the response. Could you possibly send me a few recomendations for a tester and features?

How can I find the link to this tester and leads. The above product link does not work, and I cannot find anything on the website.

Good video but don’t know why they push against the mobile guys that get training to get it done plus on a more flexible schedule. I can tell my customer just set it outside the door, we can program it after hours. Remote expert is only as good as the “expert” who sat in a OE class that a rep put on thru a seminar that any average person with a business can go to as parts supply houses host these. Really wish the scan tool mfrs would quit pushing against the mobile guys as most mobile guys I know do good work, do self training, invest in tools that some local big shops don’t want to invest in. Also mobile guys save shops time and tying up a tech as when we go in we deal with the service advisors, managers. We bring our own equipment, several thousands dollars worth, knowledge that remote experts aren’t going to see. Have several shops who’ve tried this method but cars have issues that remote experts can’t always fix. Get in the field and do the work!!

Great video!

Good stuff

Thanks. I gave myself an Autel for Christmas. Let the fun begin.

Having watched months of other videos, you have showed me how much I have missed, thinking that there is so much that is assumption after gathering info from meters and scanners, this is something I am not used to, my trade was working on electronic service repairs for the marine service and using an oscilloscope was an everyday occurrence using scopes worth thousands of dollars, even our cct diagrams had expected wave form under different conditions. Having used scan tools, I recently bought, it still left a lot to desire to repair a car, Having only watched 4 of your lectures has just opened everything up, as sone as you pulled out the scopes and showed the waveforms, it now is all starting to come together and making sense, thank you so much, if only we had the $200.00 multi lead scopes back then. We had to use a Polaroid camera with special adaptor to go on the scope to save images. LOL

THANK YOU FOR THE EXCELLENT DEMONSTRATION !!!

crazy yo, youtube has probably taught me more about modern vehicle systems than your average fix it again tony

What about testing on modern cars with coaxial cables?

Thanks!

Very informative and in-depth video!

Hello, I bought this scanner but in Latin America there is no update or how to buy it because it tells me that it does not support my country and I have not received a response from Autel support. I bought the scanner and I have it as decoration.

GREAT video, i am in school for my level 3 in Canana and we are on OBDll and canbus. Lots to know and remember.

Very informative! Thanks John.

Good job!

Well done John Thanks again .. Your knowledge is much appreciated

Your dealers will appreciate this video, John. Very well done, as always. Cheers.

Thank you!!!!

Just subscribed after finding your channel. I just bought a scanner and trying to learn as I go and I think I have found a great teacher to help. I am just a DIYer but am interested to know how these systems woork.

what a jiberish overcomplicated explanation . I will make a You tube channel for the poor people that had to watch you. Inspired me with your nonsense

This is not advanced. This is extremely beginner. Change the title.

For upstream HEGOs (narrow band, switching) closed loop fuel control, the strategy is a switching control (because the HEGO only detects two states, rich or lean) with a long time constant filter or a long time constant PI or PID control loop supplying learned fuel trim data, which is then used as a mean fuel bias level upon which the switching algorithm is optimized. If the learned fuel trims are correct for the current engine operating condition, the fuel switching algorithm will use a symmetrical jump back around stoichiometry, essentially trying to maximize the switching frequency. The upstream HEGO works well for this closed loop control because it is directly in the exhaust stream. The jump back (bang bang) control is not a controlled frequency as output, it will result in a set switching frequency if the fuel trims are perfect and the catalytic converter (CAT) operation optimal. The switching waveform is the result of everything in the control loop. The HEGO signal switching amplitude should not change pre and post CAT like shown in the drawing in the video if the two sensors are identical, and if the CAT was perfect the post HEGO would not switch at all (complete and efficient O2 control) or perhaps be pegged lean. In fact, the intermediate voltages (mid span) of the HEGO output between the normal rich lean switching thresholds are meaningless. So the CAT efficiency (or other such OEM words to describe CAT health, which is crude at best) makes sense only as a relative measure of the pre and post CAT HEGO switching characteristics. So, we can make inference between pre and post CAT switching but not amplitudes. For identical pre and post sensors the output should be the same, registering either rich or lean. This is where understanding the CAT monitor strategy OEM description is very important. Because it may imply that the CAT monitor is a special test pegging rich or lean at a certain point in the drive cycle to understand relative HEGO switching behavior. But, where in the drive cycle for emission would you intentionally control CAT breakthrough, ideally you wouldn't. This is why CAT OBD II monitor (test) is done over two complete drive cycles with specific operating conditions before the test is run. But, we could rephrase this and say the test is so crude that we don't want to set a DTC unless either the CAT or HEGO is spent. To really see the HEGO outputs it is best to directly probe the signals at the HEGOs (use differential scope probes) and not plot scan tool data.

Really appreciate the time & effort & patience you put into these professional presentations, thank you....... But I always think, Is IT REALLY NECSSARY TO MICRO MANAGE A CAR TO THIS DEGREE? !955 cHEV WAS GAS IN AND GO, NO problems

I am not understanding the point of this. Seems extremely excessive. If you have an older Prius where the existing battery management system has failed, wouldn't it throw an error in the can? The amount of labor to do all of this just to tell someone they need a new battery pack, which often isn't worth it to replace. Help me out here because this seems scammy.

Ty for for putting this up

Excellent demonstration Mr Forro

Ty not much out there on using the scope

Amazing!! Thank you for sharing it …You are the best brother!

Hello sir I am Abhijit from India please suggest me automobile oscilloscope purchase - bandwidth min required please tell me sir

Hey jhon how are you went to one of your trainings in NY like that class will like to know your email so i will like to know of you have more training coming up

willl this read the Hybrid battery on my toyota camry hybrid?

MAN!!!! You are absolutely brilliant describing the OBD/Communication system's! The T.C Motor Control/TCCM went bad in a 2000 Chevy Blazer! Its been 2 months of research, cause and effect... the list goes on. It's been 2 months and finally ready to fire after watching 2 or 3 hours from your teaching. Your techniques tied scattered thought, unfinished research, and ignorance together beautifully! The, Ability, Knowledge, and Art Form when describing the correlation between the System Algorithm/Mechanical Functions, are second to none from here, my opinion. Thank you, Sir!

How do you find out what temp bolt amp borametric things should be where is this info found

A "Care Care" shop say's they'll do a 149.00 diagnostic charge. What should I expect? So far he's saying it's probably plugs and wires... $900.00 dollars. Plus I'm sure the 149.00 diags. Are we always compelled to pay that 149.00 ??

Thanks for taking the time to do this. I'm a DIY'er and felt like I just took an Auto Tech class at the local Tech College. Great explanations and on showing how everything worked together. That video didn't feel like it was 47 minutes long. I've learned more in that 47 minutes than the past several years trying to find things on my own. You're doing God's work here my friend!

"Once you pair this to a specific type of vehicle ... " you get the same readings if you didnt. No reply from Autel yet but yes, I went to the 'mall', chose a 'specific' brand and still only basic readings. Any help on that aspect John ?

The high pressure fuel pump in the video apears to be from a 2.4L ecotec. i work on them often. The HPFP you're holding is commonly problematic. You stated that the line conected to it should always be replaced because the ball will get distorted and it will start leaking. I understand your logic but I've never replaced them nor have I ever had an issue with them leaking. Is there any other reason to replace if it's not leaking?

The irony of a video with "time is money" on the title which doesn't even remotely get to the point for several minutes is not lost on me. :) I have no problem with a long format video if it's long due to useful content. There are occasional useful nuggets in here and I'm not knocking your efforts, but you've got to reduce the filibustering John. Your signal to noise ratio is waaaay off. I'm saying this to be kind, not cruel. Especially as you're advertising a premium not-for-free product too. You'll struggle to incentivise people to part with their money if they just think they're going to get filler and padding.

Jajajaja tuve ese problema con el adaptador para medir copresión así que mandé hacer otro adaptador con la manguera 😅 saludos desde perú 👍🏾👍🏾👍🏾

Perfect... 👍🏾👍🏾 el tiempo de los videos está okey, pero creo que se deberían tratar temas nuevos o de los componentes que vemos hoy en día y ya no mencionar carburasores, tbi y cualquier sistema que ya no se usa más 👍🏾👍🏾👍🏾