Automotive Diagnostics
ASE Master
Nissan Master
Infiniti Master
Subaru Senior Master
Autonerdz Certified Oscilloscope Diagnostician.... Most important
Father of 1 and grandfather of 2 PLUS just a helluva nice guy!
Trying to do daily work, and produce quality content with proven strategies and verified results.
The channel is focused on diagnostics and teachings from 25+yrs. of experience.
So, join in, comment good or bad, and you should learn something.
Thank You
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Good luck Mr Carter 😊
This seems to be the common trend with Nissan sensors. I work on all makes and if your not paying attention this one will go right past you. Great work brother keep it up
Thanks bro, I appreciate the support.
is it a vibration or rough feeling in car you are chasing?
Yes, very rough at idle in park/neutral.
Good luck. I like your style. Look forward to all your videos.
Thank you. I hope I get this one figured out, its a stressful diagnosis.
Your 2000 dollar scantool tells you key on engine off to scan
Wow, really good information here!
Excellent demonstration. There goes the money they saved buying aftermarket parts for critical components, not to mention the hassle.
Exactly 💯
So do i move over one space from my trigger & start the count on a 6 cylinder & move over 2 spaces on a 4 or 8 cylinder ?
I do 1 space on 4 and 6 cylinder 2 spaces on 8 cylinders for this sort of testing.
@@CartersDiagnostics thanks I appreciate your videos, there really helpful
Extraordinary detail ! Super helpful !! I learned lots !!! Thanks mate . 👊🏼 🔥 💻 📈
Thanks for tuning in💯💪
Great use of the Escan. I have been on the fence about buying it.
Its fun. Not necessary but fun. Also the dongle will work with the pico nvh kit.
Great video. Detailed explanation.
That's awesome, could you do a full length video on setting up the scope and testing equipment plus give your expert analysis on the subject
The next time something like this comes in, I will try and explain in more detail. Thanks for watching.
Thank you for sharing your insights. That is something I would never thought of. A clear takeaway that I should use the scope accordingly.
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So you had 2 bad seats The original and the first 2nd hand one. What if you got a 3rd bad seat. 2 faulty units must be a common problem
That know good was a game changer. I would have just kept comparing them to my known good.
Why the failed VE I can only see that thr computer is miss reading the airflow meter. I call it hero or zero when you call a computer, I have the same feeling after 40 years.
Love the escan Vid's
Wouldn't garbage in, garbage out be a factor on all scan tools?
Absolutely
Maybe you could skewl me a bit. So here's what I knew as I watched along. There was no KV spike when you snapped the throttle. That much I knew. I can't decipher much else from ignition scope patterns, but I do know KV should rise with increase in compression. So as an amateur, can you tell me did you have any other way of knowing prior to disassembly that it was secondary and not primary? IE like had you ruled out a weak coil before diving in? I'm thinking about early 3V Fords where the coils were notorious for firing at idle and not firing under load. I do know you said this one was completely dead miss all the time so not quite the same as my example, but do you understand what I'm asking when I say how did you know it was not a weak coil and would be a secondary problem from the waveform?
Another of topic question. Have you used the can bus decoder feature in the Pico scope for diagnostic purposes? Thank you in advance.
I decode messages, just to see if they can be decoded without errors. I have no idea what the messages mean. I figure if the message integrity is good and the Picoscope software can decode it, that tells me the cars ECU 's should be able to decode them. And I should look elsewhere for my issues.
@@CartersDiagnostics Thank you for the reply.
Good stuff
Mate, I love your videos and I have learned a lot from you. As we all learn from eash other, though, I have ro point out that the Wideband Oxygen sensor readings are the opposite to what you stated in the video. Positive current (above the zero line) menas LEAN. Negative current means RICH. When the engine reved well and you pulled your leg off the accelerator pedal - the moment you call "injectors cut" actually causes the mixture to go RICH (not Lean). The injectors spray a predefined, fixed amount of fuel in this condition (fuel ECU does not look at the O2 readings then). The reason is to avoid mixture getting lean and causing "pops" on deacceleration.😊 As the throttle is fully closed at this moment, there is less air than normal and mixture is Rich. Hence the O2 sensor reading goes sharply negative (Rich) and stays there until engine load increases again and the Idle Valve opens to increase engine speed (to make it Idle). At the other moment, when you sharply pressed the acceliratior pedal, lots of Air entered the engine and the O2 sensor reading went up (Lean). The Fuel ECU compensated a moment later and the O2 reading went back to balanced. Hope that helps. Thank you so much for the effort in putting these videos together and sharing your knowledge.
Thank for the comment, very informative and yes we all learn from each other. I agree with your rich/lean statement regarding the polarity of change positive and negative. The amp clamp that I'm using is direction sensitive like all amp clamps. I simple oriented it to show positive rich and negative lean, it works better visually for me thats all. I was only interested in the speed or reaction time of the feedback system with this video and to practice a bit with my clamp. Thanks again for commenting and keeping me on my toes , great information you have posted.
Am still trying to figure out which side is bank 2 on my 2017 Nissan pathfinder. Anyone know which side it is?
Bank 2 is the front. Closest to the radiator.
Off topic question, on vehicles with secure gateway, if you tap into the twisted pair and plug it into an aldl break out box will the scan tool work just as if you hooked it up to a non-secured gateway? Thank you in advance for your answer.
Honestly I have never tried, but I'm thinking it won't be that easy. I have went around the gateway to get scope captures of the network before.
@@CartersDiagnostics Thank you for the reply. Interesting experiment, my thinking is that if the scope can see the data packets so can the scan tool. I don't have a vehicle available to experiment at this time.
Great video. Thank you.
Great video. I am 62 have been working on cars since 1979, retired automotive technology teacher, always kept a part time job in a shop doing diagnostics, background in computer test engineering. Still work part time diagnosing drivability, electrical and one on one teaching. The feeling you mention has not gone away. In my case I know the reason why it is there after deep psychological analysis with a professional. I have learned psychological tools and strategies to deal with it, not a complete solution just alleviation.
Keep up the good work. Until I finally retire the anxiety of calling expensive parts will always get me. But its fuel to go the extra mile to triple check everything, and hopefully get it correct.
@@CartersDiagnostics Love your videos. Thank you for the reply
Great video. Questions, any codes on a full system scan, any data PIDS on keyless entry system, would wrapping a scope lead wire around the door handles show the same ae the TPMS tool? Thank you in advance for your answers.
I don't remember using the scan tool on this, due to the main complaint of the battery going dead. The scope leads are shielded so I'm not sure about the wrapping technique. Autonerdz /Pico has a keyless entry signal detector part no. TA330 fairly cheap that should pick up that signal. Link to Autonerdz autonerdz.com/?wpam_id=2
@@CartersDiagnostics Thank you for the reply.
Hi sir! I have a huge issue with my Versa 2020!! Unfortunately I came to Mexico and I don’t trust mechanics here! You think I can have like a phone consultation with you? I’ll pay for it with a transfer or something
Is it possible the coil was absorbing the energy is why the negative spike?
@Carter : Anyway you could do some mode 6 videos. I like to learn how to use the function and be able to apply it to my diagnostics.
I'm no expert with mode 6 , but the next case study that I mention mode6 data I will try expand on it some. Thanks for watching!
Nice video. Here trivia for you, why does the dwell period on secondary go negative voltage?
Whenever I use an inductive wand for secondary, I personally don't trust the numbers I look at the picture its drawing me. But the negative portion of the ringing is the Polarity changes produced from the charging and dis charging of the step up transformer.
@@CartersDiagnostics Thank you for the reply
I still revert back to pico6 when I need a quick capture. Pico 7 runs slow on all of my laptops, I have trouble finding the functions I need quickly and have frequent crashes.
I use both. I'm glad they play nice on the same PC. My P7 skills are still under construction 😆😂
Does that have metric units as well? like temperature in F to C?
I think you can change from standard to metric.
Thanks CARTER great stuff Mike Carter
Thank you!
Great video Carter do you keep Stabilint 22 in your tool box?
Yes I have some of that liquid gold.
Amen Brother
Excellent diagnostic video like always Carter! Very well explained! Many years ago I was trying to diagnose a 2011 QX56 code P062B and I had a misfire not related to the injectors circuit and I put the pulse sensor in the Intake, and I was more confused than before. Crazy waveform and I am pretty sure is for the VVEL system. Thank you for sharing your knowledge.
When I do intake pulls I like to start with throttle closed and cranking, that seems to produce the simplest wave forms to try and spot issues.I may have to resort to other methods but thats a good starting point.
Thank you for using pico 7. The more I see it the more I get used to it!
No problem. I'm still getting used to it myself. Gotta keep practicing.
Love learning, thanks for bringing me along through you diags!
No problem. Thanks for riding along! 👍
Great captures! Always happy to watch your stuff! I think it's ridiculous that the warranty people can't understand that these waveforms and test are more than enough proof. I captured a rod bearing noise on a clearly knocking and bad engine. They forced me to remove the pan and rod caps,sure enough i was correct. They still force me to disable the car completely so now it can't move under its own power! Why does that make sense to them???
Yeah there was talk of actual pan removal on this. I'm hoping the boroscope pics will save us. It also creates alot more down time for the customer and then the age old question of who pays for the rental usually not the warranty company.
Hi. I have two questions. 25:34 Why do you show that the compression tower should be on the left side? It's not better to be further to the right, because the ignition is behind top dead center. How to determine accurate GMP without pico WPS? Thank you
It seems more normal to me for the ignition to fire BTDC, but with fuel control codes stored,( because of how I disabled the fuel for cranking test.) So who knows the ignition strategy, plus I have a leaning tower that is not giving the correct location of TDC and that throws off all measurements using the peak as a base line. What is GMP?
@@CartersDiagnostics my English is poor. Here we call GMP the top position of the piston. How can I determine the exact top point of the piston when I do not have WPS?
You could put long screwdriver in the spark plug hole and crank the motor by hand until the screwdriver reaches it highest point. At that time its either Top dead center compression or Top dead center exhaust . Or if you have a scope and scan tool. You could sample the crank sensor and an ignition sync then read the commanded ignition timing on the scantool. Then Figure out how many degrees per toggle or transition of your crank sensor in 360 degrees of your crank rotation. You then could figure out where TDC will land on the crank sensor. So for example if your ignition timing is 10degrees BTDC then move to the right of your ignition sync how ever many transitions of your crank sensor would equal 10 degrees. That would theoretically TDC compression.
27:29 click the views tab to toggle channels on/off !
Nice. Thank you for that.
I've had the latest stable release crash a few times, versions before that no real problems at all. I'm hoping it's not going to be the start of constant issues like I've had in the past with P6.........
I'm still on 7.1.13 stable. It only crashes when I make KZread videos 😅😀
Ok I’m confused. Agree a leaky valve produced a deep expansion pocket .. normally the expansion pocket vacuum shld be very close to the intake pull vacuum … in your case the expansion pocket is much higher (less vacuum) … if it was leaking on compression it wld have more vacuum wouldn’t it???
This engine does weird things with intake valve timing and valve lift cranking and idling. (I'm actually in talks with Nissan now to get some clarification my self.) So comparing exhaust pocket to intake pocket on the same wave it kinda breaks the rules a bit. Just notice the bad cylinder had 12in.hg exhaust pocket vs. good cylinder had less than half of that. This engine has exhaust vvt intake vvt and variable valve lift vvel so lots of stuff going on. I did not unplug anything so this is raw data. Hope that clears things up some.
@@CartersDiagnostics fantastic please post Nissans reply … this can send us down that endless rabbit hole😉
@@CartersDiagnostics fantastic please post Nissans reply … this can send us down that endless rabbit hole😉
Saludos Carter . Excelente video . Muchas gracias por compartir. KIKE® de taller Pit Lane Costa Rica .
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I thought it was only me who had the issue with the phase ruler. I prefer the p6 version. Nice video as always Mr C
I prefer 6 also for pressure stuff. I think just allowing the user to turn on or off the shading would be great.
I had a laugh at the rubber glove 😅... it do be like that sometimes with these companies
Crazy how some of them operate. Jumping threw hoops for these aftermarket warranty companies can be frustrating at times. I swear some companies are looking for any loop hole to deny the claim!
So much valuable information in your videos. Thank you for taking the time. 🍻😎
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I always learn a lot with your vids, another good case study. Just curious, what would be your best guess on the scored walls damage, dirt falling in cylinder during spark plug change???
It only had 59,xxx miles on it. I got a feeling it was a manufacturing issue that is starting to flare up. We actually have a TSB on cylinder wall issues concerning #7 . So who's to say that issue couldn't have happened in other cylinders. Just my thoughts.
CANNY ,Carter's Diagnostics Brilliant video 👍 Enjoy your weekend with all your family around you, Carter's Diagnostics From Nick Ayivor from London England UK 🇬🇧 ⏰️ 07:33AM Good Morning 🙏 🌧
Thanks Nick, I appreciate it!
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