Toyota Dealership Couldn't Fix This Car. Is it Their Fault?

We look at a 2010 Toyota Corolla that have previously spent 2 weeks at a Toyota dealership that eventually couldn't figure out the issue which is intermittent.
But is it the dealership's fault for not being able to diagnose and fix this issue? We'll go through the diagnosis process and eventually fixing this car in this video then we'll talk about what the dealership did right and what they didn't do right.
TCCN Automotive Inc.
Toyota and Lexus Specialist Repair
Visit www.tccnautomotive.com to schedule your appointment today.
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#thecarcarenut #tccnautomotive #toyota #lexus
0:00 Intro
0:32 What's The Problem?
3:17 Car Network Explained
8:04 Diagnosis
16:04 Repair
25:58 Verification of Repair
27:50 Finishing Up Car
30:01 Is this the dealership's fault?

[@shermdog6969]

I think a lot of dealer mechanics now are more parts replacers than actual mechanics.

[@melvingibson4525]

The dealer charges $150 per hour and pays the mechanic $25 hourly on warranty jobs that pay 5 hours but take 8 to complete LOL

[@nickolastiguan]

They are not really mechanics, more like technicians. And I’d guess dealers and the manufacturers would prefer/want the tech to replace, rather than fix the problems.

[@juanitomendoza3102]

They are straight outta high school 😂

[@justahumbledude]

@@melvingibson4525 Which causes the labor and knowledge gaps.

[@javierese9355]

Car Diagnosticians.... They find what need, should, and not be changed yet...

[@SergeiDergachev]

As we all know, it was not “lucky guess”my friend. It’s an educated guess from a knowledgeable, intellectual mechanic. Thank you for sharing and educating 😊

[@redbaron6805]

I wouldn't even say this was a lucky "guess". When you work on any type of a system for long periods of time, you learn certain patterns of frequent failure items. I don't doubt for a second he has replaced several steering angle sensors for similar issue in the past, and therefore knew where to look. Every problem is much easier to find the second time around...

[@bradchoi9679]

@@redbaron6805 Agreed! THIS is why it's not a good corporate policy to "get rid" of the old timers. They have ALL the experience that the younger (read: less expensive to employ) ones haven't experienced yet.

[@redbaron6805]

@@bradchoi9679 I couldn't agree more, but corporations are obsessed with short term profits, not long term, as everything is based on quarterly results, and management gets bonuses based on quarterly and annual profits. I work for a Fortune 500 and see this short term thinking all the time. There is no long term planning and hiring cheaper workers to replace experienced workers with years of experience shows up in lower labor costs, but is offset by much higher parts costs, shipping costs and repeated service visits, time penalties and far longer time to get things working with lower up time. Most corporations however cover that up because the parts and shipping budgets and uptime contracts which have penalties for lower uptimes are in separate budget columns. I can't tell you how many times I have seen companies would rather replace a $5000 part rather than pay someone $100 in labor to fix the issue without that part. The excuse is always the same, the labor budget is maxed out, but we still have a lot of room in the parts budget, so wasting money on parts saves labor time. It is just absurd and bizarre and the same time...

[@johnaclark1]

Remember, he diagnosed this off camera and likely it wasn't the first module he disconnected. I usually unplug modules based on what is the next easiest step. I have the same vehicle and had the same problem a year ago. In my case, after figuring out it was a dead CAN bus, and had good terminating resistors, I started with the ABS module, then the seat position module under the seat, then I started searching for the junction connector where all the modules connect to the CAN but never did find it as it wasn't where it was supposed to be so I ended up unplugging modules as I got to them.

[@zacktobak256]

Wow you’re my hero 😍

[@HellhoundXIV]

Toyota should give this guy an award

[@MikeBurton-hq7ip]

i could not have said it any better.......he is sharp

[@andremontmartin7207]

Yes, it would be a fair and well-deserved reward for his excellent work and the very positive image he brings to the Toyota/Lexus brands.

[@juerbert1]

Yes, Tokyo Nobel Prize 🏆 for Toyota technician !😂

[@JAY-97-97]

for What exactly? ...

[@welbyroberto6581]

On top of the Gold KZbin award he received earlier

[@stormforge68]

IMHO this channel should be mandatory viewing for all Lexus/Toyota mechanics. Will help to increase repair standards from average to excellent.

[@brudevold62]

This guy should be the litmus test of receiving Toyota/Lexus master technician title.

[@sdrifter13]

This channel should also be mandatory for customers and DIY'ers. I like that he explains both point of views (Tech's point of view and customer's point of view).

[@JG-sp2dn]

He should be working in Training for Toyota but i believe he’ll have better outreach with KZbin

[@revvolutions]

He should be the final boss to getting the Toyota master tech certification.

[@dnegel9546]

But but Toyotas never break down 😂

[@Noeau]

He said we got lucky on our first try. I beg to differ. This guy is so sharp and does his troubleshooting methodically so luck doesn’t seem to be an accurate description of this example. Wish he was in our neighborhood. Whatever he charges, it’s worth it. A great, honest technician is hard to find.

[@redbaron6805]

Not just sharp, he has decades of experience, so has seen a bunch of things before. Every problem you spent time to solve in the past, is a problem you will solve quickly in the future. Which is why experience is priceless...

[@ahypernova]

By "lucky" I think he meant that it didn't get to harder to replace components, luckily.

[@dannyrbasham9389]

I actually drove from Oklahoma to his shop to have him install a transmission cooler on our 2021 Tundra TRD Pro. Worth it!!

[@idris_pm]

Real pros are always humble. Ahmed is surely the one.

[@redbaron6805]

@@ahypernova He said the made a logical guess, as he chose the module that does actually move when you move the steering where, so anything that moves has mechanical wear and is the mostly like culprit when something fails, vs a static module like ABS or other sensor modules which only receive and process signals, but are electronic only, no mechanical sensor. The Steering Angle Module probably has a potentiometer inside it that wears out over time...

[@andylafontaine9577]

Plse do more CAN and general wiring diagnostic videos!! So interesting...

[@MrGcfsa2653]

I agree with you

[@johnaclark1]

One minute in...that looks like a CAN bus issue. Had a similar issue on my 09 Corolla about a year ago. It took me about 2 hours with a scope on the CAN to track it down to a bad Steering Angle Sensor that was pulling down the entire CAN. Unplugged the SAS and the network and everything came back. Just had a traction control light until I replaced the $400+ SAS. Toyota has a great strategy when the CAN network goes down...the PCM will still run the engine and you can drive the vehicle. Love it. Edit: Well, 17 mins in, and I guess I was right on the money. It must be a common issue on these. I was trying to get to the junction connector for the CAN which was not where Alldata said it was so I started with other modules before the SAS so it took me longer but I got to it in about 1.5 - 2 hours.

[@rajuyr]

My 2009 Corolla was misdiagnosed by the Toyota dealer as well as another reputed private mechanic. Both said I need to replace the whole steering assembly. While a local startup mechanic immediately recognized the failure of clock spring due to his previous experience. I did write a letter to Toyota Canada to update repair procedures/ train dealers. One manager from Toyota called me to know the issue in detail. Thank you TCCN for another great video 🙏👏

[@gregrussell5374]

Ahmed, you are a good human. Your tone of voice did not trash the dealership mechanics. You understood scenarios where they could have unintentionally failed.

[@subtegral]

The real truth is they intentionally failed.

[@redbaron6805]

@@subtegral Except that is not what happened at all. Lets say it took 10 hours to fix this issue. You seriously think ANYONE would be willing to pay $1,500 to $2,000 or more to fix this issue on a 14 year old Corolla...?

[@ghostwrench2292]

It's because Ahmed has worked in dealerships and he knows how things go there. Dealerships techs are under pressure to turn cars out as quickly as possible and flag as many hours as possible.

[@riceburner4747]

He's a class act! 👍

[@redbaron6805]

@@ghostwrench2292 Except none of that is actually true. Repairs have a book time, which is often far less than what the job actually takes. No one is "flagging" any hours, as mechanics best case scenario get to bill actual time, as finishing jobs under book time is very hard unless you have a lot of experience, and even then it is tough.

[@Jeep4X]

As an aircraft avionics technician for 32 years, you have to learn to troubleshoot a problem. Take all the available data and run through all the scenarios that would cause each issue (if there are more than one). There is always a common cause. The hard part is figuring that out. Not all technicians/mechanics are created equal. Remember that.

[@Jeep4X]

As an added note, on a modern military aircraft your vehicle CANBUS is sort of equivalent to a MIL-STD-1553 Avionics Data Bus. You have to know your stuff and have the proper test equipment to troubleshoot. Just guessing is not the way to go.

[@Nathan_Jay]

Dang, and here I am on ARINC 429 & 664 😂

[@banzaii6285]

You said a mouth full there...diagnosis separates the real "technicians" from the parts changers.

[@mikalcobbs9402]

Are aircraft technicians paid flat rate?

[@12current]

@@mikalcobbs9402 No, we are not paid flat rate. Most of us are paid hourly, whether we are AVNX, Systems or Structures; Scheduled and Unscheduled.

[@paulmeglasson1919]

In my 30+ years with Lexus, I've seen the steering angle sensor fail multiple times. Usually you just get a lost communication code, it's rare to have it take down the network. Thanks for the video!

[@beerster]

The CAN has an industrial application called CANBUS. The machines we sell operate using it. I have struggled trying to understand it. This video is a tutorial all plant electricians should watch. I'm the President of our company and all of our techs will be watching this. You are amazing.

[@1hjehje]

I'm a retired Engineer and a curious person by nature. Perhaps, from a diagnostic perspective, some technicians don't have a good conceptual understanding of the CAN network and how it interoperates with the various components. If that is the case, then it becomes a hit-and-miss situation where there is a reliance on luck when trying to identify the problem. If the problem is persistent, then a component level diagnostic approach of disconnecting and reconnecting components should help to identify the problem area. Calm and rational thinking is the way to go, but human nature being what it is, this can be challenging. Thank you for such an excellent video!

[@briank10101]

Some technicians, when they see CAN, they can't.

[@jstarr11111]

@@briank10101 Good one!😉

[@ghoulbuster1]

It's simple, the techs get paid to unscrew and no more. Real diagnosing requieres time, which the dealer doesn't pay.

[@icosthop9998]

I am waiting for him to talk about the massive recall on the 2022 - 2023 Tundras. Toyota is forcing the dealer's mechanics to reconstruct the 2024 Tundra engines instead of sending the dealers a brand new engine. And the reconstruction is not going too well..

[@beesong2450]

calm and rational are the key words. its hard to troubleshoot something you're not fully experienced with.

[@henrymorgan3982]

Your greatest gift is you attitude toward you job and life. We all learn from it. Great video as usual!

[@MrHitchikerOz]

You can't excuse the dealership for this situation. I'm an old school mechanic, trained on the Australian apprenticeship model. Any dealership I worked for was responsible for training me on how to service and repair their vehicles. This was in turn a part of their commitment to looking after their customers (remember, they buy the cars, and without them none of us would have 'bread on the table'. If the dealership can't be bothered teaching their mechanics then why should the customer display any brand/dealership loyalty. Great explanation of the CAN system and it's functions, probably the best I've seen on KZbin. Keep up the good work.

[@macedindu829]

I really love how he always cleans the engine bay.

[@Reggaejames]

That shows he really cares for the car. Makes me respect this guy even more!

[@ramdodgetruck]

Loved the video but was surprised he didn't check the air filter after cleaning the throttle body.

[@zeza2217]

@@ramdodgetruck The air filter is a separate issue and he was not paid to check that. He had to clean the throttle body because most modern cars when you disconnect the battery the idle goes crazy trying to re-adjust to the throttle body which by then it is not as when it was new, and so the computer is using the default settings on a very different throttle body from when it was new. He could not give the car back to the customer with the issue fixed but also with new issue which could easily be fixed, and that it was caused by the repair (it cannot be avoided). this is a certified hood classic

[@vitanksi]

Same thing happened to me at a Chevy dealer. It sat for months while they diagnosed it. First blamed me for aftermarket wiring and devices. Which were dealer added options they installed. They threw in a new bcm without further diagnosis. Fried that one too. Months later they found a break in the wiring and put in a new wiring harness. In the mean time it sat at the back of their lot and was broken into. If CCN was working there that never would have happened. Good job dude. This is a master class in diagnostics.

[@TEC_Stuff]

Sorry to hear your vehicle was broken into. I’ve had that happen and it is not a pleasant experience. I hope your vehicle is working well for you now.

[@etravix]

Great diagnostic lesson. Your channel is keeping my 05 Tacoma running smoothly.

[@JAY-97-97]

how is IT doing that ??

[@user-zj6mv6eg8q]

It is such a pleasure to watch Ahmed systematically resolve these complex problems and to also dismantle and put everything back together again.

[@423tech]

This is BY FAR my favorite video you've ever posted. I absolutely love electronics diagnosis, and this was an absolute blast to watch. I laughed out loud when you measured the 9.9K Ohms and said "yep it isn't shorted"

[@michaelperrin2531]

A possible case of the dealership just kicking the CAN down the road. lol. Very informative video.

[@FSM_Reviews]

Nice pun

[@Stephen-iv3kd]

@@FSM_Reviews Well spoken...and hilarious :)

[@tonyjones629]

Good one..lol

[@The_Noticer.]

God bless you sir.

[@Rick-O-Shay60]

Top notch diagnostics! Had a similar experience with dealership. Intermittent problem setting air bag light on. Dealership could not figure it out, so their diagnosis was it needed a part that was no longer available, so they could not fix the car. Turns out the problem was a bad connection on seat belt sensor. Dealership didn't want to spend the diagnostic time to figure this out. They lost a long time faithful customer, and in turn, sales of a new car purchase two weeks later.

[@redbaron6805]

Except, as he noted, finding intermittent problems is very time consuming, and very few people are willing to pay hundreds, or even thousands of dollars in diagnostic fees and time to find them. Like this car, if it took 24 hours to find it at $150 an hour, would you pay $3600 to get this Corolla fixed...?

[@pedlpower]

They didn't want to spend the diagnostic time or you didn't want to pay for the diagnostic time?

[@redbaron6805]

@@pedlpower Exactly....

[@candeffect]

The cheap yellow air bag senor connectors move a little. Fine dust builds up on the exposed contact metal where there is no connection. The connector contacts move just a little on top of the dust. Disconnect the connectors, spray with electrical contact cleaner, let dry, reconnect, put zip tie on connector to not allow movement. Worked for my car.

[@Rick-O-Shay60]

@@pedlpower They were clueless. I paid them two hours diagnostic time, they couldn't find the problem, so to cover their labor cost they said the problem was a part no longer available...They couldn't fix the car. If they had spent part of that two hours and reached under the seat to check the connection on the seat belt harness (which is one of the first things t check) they would've fixed it (as this was the fix) So to answer your misguided question. You're question is moot!

[@neilr4867]

Ahmed, you're the 🐐 of Toyota whispering. All of us guys working on these cars at home are forever in your debt. Thankyou for sharing your knowledge with us 😊

[@johnmcdonnell81]

No luck involved, just knowledge backed up with hard earned common sense. Keep up the good work.

[@Sark_Karmir]

I wish I had a human like you here in LA. My go to guy moved to Arizona and now I don't have a reliable mechanic. Good job once again.

[@kootnygreen]

Thank you Sir for helping this old chevy guy to understand my wife's Toyota. And not be intimidated to do maintenance or repairs to it.

[@KendrasEdge757]

That wasn’t ‘luck’ that was EXPERIENCE and EXACTLY why I don’t mind paying a diag fee for the hour if you find it in ten minutes. You’re paying for the EXPERIENCE! Great job once again brother. God bless~

[@TheFraziers]

I could watch Car Care Nut diagnose and fix stuff like this all day. So insightful.

[@Zephyrdaze1819]

Highly recommend getting repairs done at Car Care Nut’s shop. Accurate assessments of problems, excellent repairs, all from one of the nicest people you’ll ever know.

[@PrOrHo]

Don't you think anyone watching his videos already feels the same way?

[@polishhotdog933]

I would but I’m in NJ, by the time I would get home it’ll be time for routine maintenance again.😂

[@Zephyrdaze1819]

@@PrOrHo I can’t speak for anyone or everyone. Many will never get to TCCN for repairs, much less meet him. I hope you do.

[@Zephyrdaze1819]

@@polishhotdog933 ha!

[@smiththers2]

as an aftermarket electronics tech myself, i am SUPER glad that you are not blaming the remote start right away! so many dealers in my area just point the finger as soon as they see anything installed. 9/10 times we'll unplug the offending item so they can diagnose without blaming us and it turns out to be something factory that failed (im looking at you nissan!) I will also say that i learned something new today that i will hopefully get to use in the future! i run into can issues sometimes on vehicles (may not apply to non-toyota vehicles) and this is very valuable information. thank you!

[@dnegel9546]

Not just you guys but the audio installers as well.

[@ianferrier235]

Man I wish you lived in my neighborhood. You fixed my 06 Lexus Rx 330. The adapted head lights stopped working and you said clean the lights, I did and they are working. Thanks love your videos.

[@sleepysamk1400]

Main dealership have Fitters not Mechanic’s. People like AMD are a rare thing nowadays

[@redbaron6805]

They are not rare as independent mechanics, you just have to find them. They are rare working for dealerships, as dealerships and manufacturers keep cutting the hours they pay for repairs to below actual time. Book time on repair X is 3 hours, but takes 6 hours. So, as a mechanic, you spend six hours to do a job you will get paid 3 hours to do. How many people will accept that long term? Hence, the churn and revolving door of mechanics at dealerships.

[@icosthop9998]

​@@redbaron6805 TY

[@TonyRule]

Fitters and throwers.

[@JAY-97-97]

debatable, that is...

[@redbaron6805]

Got to be careful with statements like that, as AMD worked for a dealership for decades before opening up his own shop. Are you claiming he was just a fitter while working as a mechanic at a dealership...?

[@briank10101]

My respect for you keeps increasing after seeing how you approach situations like this. 🙏

[@alstines1]

Awesome video! I doubt most dealerships have mechanics with your depth of expertise. When Toyota/Lexus has an issue they can't figure out, I hope they have you on speed dial as an expert consultant.

[@redbaron6805]

FYI they make a OBD2 breakout box, which connects to the OBD2 connector, and makes it 1000x easier to take these readings without trying to find and touch tiny pins. The break out box gives you a little plug for each pin and starts at around $30....

[@peterromano1911]

The dealership is the only one with this breakout box because it is mandatory for the dealership to have it and the manufacturer pays for the dealership to have it. A neighborhood repair shop is not going to have this tool.

[@redbaron6805]

@@peterromano1911 The OBD2 port is standard equipment in basically all cars. Hence, you don't have to buy a manufacturer specific box. A generic box can be bought for $30 which will work on any car with an OBD2 port...

[@peterromano1911]

​​​@@redbaron6805 What AMD did is more than enough to test the CAN network. No breakout box is needed today so save your money. Technicians need to learn basic electronics, networking and how to read and understand schematics. They are no longer just a mechanic, they are Electronic Technicians.

[@jmwintenn]

@@peterromano1911 think you're having a comprehension issue.

[@peterromano1911]

​@@jmwintennI got nothing for you that would be meaningful to you on your level.

[@nisw1918]

Please support this guy and watch the commercials you can always mute them .

[@user-fk2mp5xh4s]

I just let them play, and walk away when they are long.

[@briank10101]

I prefer to not see the ads some of the time, so I use Newpipe app when I don't crave seeing ads.

[@dawood2u]

I make sure I like every single video of his. Hope he gets to 5 million subscribers soon.

[@Louiepr60]

No commercials when I watch 😊

[@dawood2u]

I don't even own a Toyota. I have a Jeep lol.

[@stevet2125]

You are freakin amazing!! I love your intelligence, knowledge and step by step analysis.

[@kwaitefuni9152]

Troubleshooting/debugging is a crucial skill. If you can identify a smaller region where the problem appears, then you can save so much time. For example: coding/programming

[@riceburner4747]

Being an old man, I figured it was a poor ground. Saying this, I wouldn't have know WHERE. Great video, Dr Ahmed. You made it easy to understand. Thank you! 👍🇺🇸

[@anthonyvon4531]

I've seen South Main Auto lately using the 120 ohm as a start to find out network issues. Plus I remember a '19 truck in his channel. The dealer quoted something like $3,800 in modules when it was a main chassis ground. Unfortunately dealer credibility has gone downhill overall.

[@kens32052]

Another good KZbin channel is Pine Hollow Auto Diagnostics.

[@anthonyvon4531]

@@kens32052 Plus their ongoing subtle feud over butt connectors. 😂 Like a cold war.

[@thepetehill]

I saw Eric O’s diagnostic just this week. Amazing how these line up!

[@anwalt693]

Dealers have NEVER had credibility. I recall people complaining about dealership incompetence 60 years ago. Nothing has changed. The dealership business model has always been "It's time to buy a new car!"

[@anthonyvon4531]

@@anwalt693 I've come across a few really good dealerships but mostly bad. It just seems even more difficult to find any good or even ok ones at all.

[@americanpatriot2422]

Always an outstanding video and presentation.

[@karolskakes388]

Three Toyotas still driving and three gone down the road, we no longer use Toyota dealer shops. At the purchase of a 2017 Camry, the sales person offered first oil change on dealer - bait and switch, (we are 3.5 hrs. away), arrive, oh no we do not do free oil change, but we will do a 18 point check along with an oil change for $$$$. We drove back home. So it is so refreshing to hear you talk Toyota in an honest way - May God give you a long life and the desire to keep producing these videos.

[@GixxerRider1991]

Why would you drive 3.5 hours for an oil change? The money you would spend in gas and wear and tear on the car just to get there would work out to nearly as much as the value of the service even if it had been free.

[@karolskakes388]

@@GixxerRider1991 We had other obligations in that town at that time - making us frequent visitors. You are correct in that oil change hired raises the cost beyond it's value.

[@melvz2012]

This is why I watch your videos. A knowledgeable guy in KZbin who knows what he's doing and shares he's knowledge to everyone...freely. Thank you!

[@tomdrummy4984]

Great video ! There is a difference between knowledge and wisdom……..you have both 👍👍

[@jstarr11111]

AMD IS the "G.O.A.T." I am a DIY guy, and always find CarCareNut videos entertaining. This one was educational too, for me. Great job!

[@jeffsullivan3101]

I watch every new video you do and am never disappointed. I knew OF the Can bus didn't have a clue as to HOW it worked. Now I do. Thanks my friend for educating and entertaining us at the same time.

[@JJF1973]

Absolutely brilliant! He puts some of these dealership technicians to shame.

[@zero2three1]

I work at a small collision and paintless dent repair shop here in California and although we don't do mechanical repairs (aside from personal vehicles), I find myself recommending your channel to customers with Toyota's that have more than just a cosmetic interest. Some are already aware of you. Very cool. And, luckily, there is a competent technician just around the corner that I recommend going to.

[@EarthSurfer]

If this was a 1970s Toyota, I’d be looking for the old school “glass barrel” fuse with a hairline crack in the metal fuse material. Apparently this generation of fuses was not well engineered for the high temperatures seen in the Southern US. Fuses sourced from US Automakers would have some bends in the metal fuse element to allow for thermal expansion. It tools a few years for Toyota to catch up.

[@spneall]

From A brother on the Honda side, great video and example of diagnostic. Keep doing your thing and letting the general public know that there are still techs out here who care about their craft, reputation and haven't lost sight of the fact that we're here for the customer.

[@mysterc2862]

Well done sir, I love your channel, I have a 2020 camry se awd, iv learned so much from you, wish I lived closer to your shop. Have a great weekend!!

[@javierclift9991]

Professor Car Nut, great pod cast. Awesome information. I learned a lot from this lesson. Thank you very much . Can’t wait for the next lesson. God bless you and your family.

[@frederickneal4781]

The Car Care is the best mechanic technician in our lifetime. HE IS STRICTLY THE BEST AND NOT JUST A PART REPLACER.

[@jpcheco]

Somehow he should pay attention to his diet, we need him to ve around for many more years! Just look at him filling all that void space by the car door… lol.

[@ghostwrench2292]

He certainly is a very good mechanic. I can assure you that there are many good, honest mechanics out there - I have worked with them. It's just a matter of finding them.

[@JAY-97-97]

that is debatable...

[@slalomking]

What about South Main Auto, Eric is very good

[@JAY-97-97]

@@slalomking he does not get in many Toyota to His shop?

[@smittyreynolds3809]

And this is why I love this channel. A true professional. Thanks for all the good work!

[@shadihaddad7]

I'm currently chasing down an intermittent P0340 when starting my 3rd gen 4Runner and this video helped remind me to take a deep breath and not get frustrated with all the electrical diagnosis I've been doing. Thanks AMD!

[@jhaedtler]

Back to common sense! you and Eric O from South Main Auto! are the only 2 I will watch these days! Thanks for the videos!

[@patrickrandall6665]

I also watch Rainman Ray because he is good at diagnosis and common sense. Eric O is 1 hour from my house and i may have him check over my Toyota some day.

[@happy543210]

Using the car chime instead of a scope is a fantastic tip. Thank you so much!

[@czerus2233]

Always afraid of the CAN bus network but now in this video it was simplified (as I have moderate computer apprehension) and now it make sense to me how to start diagnosing this kind of communication errors. Thanks as always, there's always something new to learn on this channel and I love it.

[@stevogman3054]

Ok, you sir are a bad ass officially. I’ve been a diy’er for over 40 years and I normally just love your approach to diagnosing and repairing but this diagnosis is on a whole other level. Wish we had more mechanics like you out in the repair industry.

[@lot931]

Thanks for all your work on these videos. Well done.

[@uhplumber5962]

I've been watching your videos since we bought a 4runner last year. I do my own maintenance and you are a wealth of information!

[@cameronfell4415]

Oh my gosh, I was not expecting this video to go this way 🔥. I have been looking into CAN buses and the protocol itself to try and work on cars that have faults in these areas (I'm studying to become an Electrical Engineering Technician) and this helped me conceptualize how I can go about working in these areas. Thank You Mr Care Nut 😂

[@kevinrtres]

Brilliant video! Opens up the hidden world to the un-initiated - like myself. Thank you!

[@randywilliams5337]

What a great explainer on CAN systems. Thank you very much..

[@earx23]

My compliments. Electronics are often the bane of mechanics, but you manage this field perfectly.

[@markkeyser]

It's a pleasure to watch a real professional work! Great video. Thanks!

[@ericcoombs]

I love your channel, all such great information. Thank you. I am a big Toyota enthusiast and really enjoy your Toyota content

[@rightlanehog3151]

AMD, Your explanation of the chronic problems generated by the dealership compensation model is worth its weight in gold. If I ever get a 2010 Corolla of my own, I am heading straight to your shop!!!!!🤩🤩

[@Mr-pn2eh]

Do you live in the region

[@abyssalsoul6216]

Remember ..."common sense"" ..ain't common...nicely done AMD !

[@justinlanglais9825]

Great video AMD !!!! Your skill and professionalism are admirable! 👍🏼

[@csotelo225]

This guy is the absolute most knowledgeable TOYOTA repairman that exists on this planet

[@efil4kizum]

LoL

[@theholt2ic219]

He is a master of his art and its not even close. He thinks like a software engineer.

[@efil4kizum]

@@theholt2ic219 joker!

[@dnegel9546]

But Toyotas dont break down atleast according to reddit 🤔

[@slalomking]

Also see Toyota Maintenance, Peter is very sharp on his channel

[@andyquintero8802]

I recently discovered your channel while I was deciding to get a 2024 Tacoma. The way you educate us on cars is extraordinary and you got me hooked onto your channel. Keep doing what you’re doing and I can’t speak for everyone else, but you got likes and views from me for every video you post!

[@dougmiller2937]

I didn't get enough of getting my ass kicked this week so I'll watch your stuff.

[@williamalexander7512]

50 years ago, we called these problems "a mechanic's nitemare ".job well done. Enjoyed the show Thank You

[@ronwade2206]

I worked at 3 major dealerships, 2 GMC 1 Chrysler Jeep, electrical rebuilder and major rewire. I am so glad to be the hell out now! Good luck.

[@AliAkbarAfghan123]

Wat is you are career path now?

[@slalomking]

Did you jump out of the skillet and into the fire, is the question

[@lawrenceralph7481]

You did a good job of illustrating a complex problem. Makes it clear that having an outstanding tech is a real benefit when you can find one.

[@KentuckyReef]

Every “technician” should have a BOB (break out box). You should have 60 ohms and good “comms packages”. With a “bob” this is VERY easy to tell…

[@ghostwrench2292]

I assume you mean a data link connector break out box. Some manufacturers have breakout boxes for each module and their dealerships are supposed to have those. In reality, many dealerships do not. From the one dealership I worked at that had most of the breakout boxes, I can tell you they are really nice to have for diagnostics.

[@mrjj1f]

What a fantastic lesson! Thank you for sharing your expertise.

[@HFVidShotz]

Experience is priceless. Great work AMD!! Thanks for taking the time to educate us. God bless!!

[@drewnc6196]

Taking that time to clean the engine bay, wow! You sir are amazing!

[@justahumbledude]

Learned about CAN when I heard about theft by hacking into the network and making subsystems subvert security using relay attacks. I'm an IT systems architect and engineer so this stuff is right up my alley although I'm literally an illiterate on car repair. Logic is the ONLY way. Question--we have OBD2 applications that can read codes....WHY can't there be a specific tool or program to diagnose CAN issues? Systems are complex enough now and with AI I don't understand why the computer can't have some systems in place JUST TO keep tabs on things and communicate discrepancies. I honestly think the OBD2 port is antiquated but a necessary "Back door". All of that information should be presentable on the infotainment system. Stop running interference for the dealership. I get the time aspect and the fact they need to get paid....but there needs to be a better way. Thank you for cleaning the engine at the end.

[@michesbianan]

Let me take a stab from business point of view. Adding this feature to the CAN is money, these problems are edge cases (car theft aside), the manufacturer at the end of the day will pass the R&D costs and parts to the consumer. The general consumer will not really get that and won't be happy. I am talking other people not viewing CarCareNut, we are different breed. I am also from the tech industry, even the computer motherboard doesn't have diagnostics for the power capacitors.

[@tr1bes]

Perhaps you should create that tool for the public and mechanic to use. You can really make good $$$ doing it. A diagnostic tool to figure out which part(s) have problem.

[@AndyGrouch]

I used to work in a software company who tested these Can Bus systems for vulnerabilities. They can get very complicated. I can only imagine how complicated they are in the cars made in 2020s

[@redbaron6805]

That question misses a lot of what is going on here. The CAN system DOES have diagnostics and redundancy checks, but if a module fails and shorts out the network itself, the diagnostic network goes down. You can have the most advanced AI computer in the world, but if the network cable connecting it to the outside world is damaged, it can't communicate nor diagnose anything. As he noted in the video, if you connect a OBD2 scanner and the network is down, it DOES tell you what the problem is, something is shorting out the network, so you need to disconnect the modules to figure out which one is causing the problem. Also, OBD2 is already obsolete and being replaced by OBD-III...

[@mph5896]

Then Design a system then for the computer to diagnose it. Intermittent electrical issues can be VERY time consuming. Would the customer be willing to agree to an open checkbook for a diagnosis? I spent 16 hours chasing down an intermittent can issue. So $3k to find the issue in the end. Is the customer going to approve that?

[@Admirercarlsagan]

Short due to friction ,you have applied this logic here Dealers don’t want to spend lot of time on a old models and come with a large bill The owner might not accept The car would have been parked idle for 2 weeks and returned The dealers will concentrate newer models on which brings in money Further , it is not advisable to take a car 14 years old to a dealer There are smart private mechanics as this gentle men who can resolve the issue if you are lucky

[@dnegel9546]

Lol

[@sjtube6198]

I didn’t understand all technical electrical info but I really enjoyed the logical process. What a help this video could be to local TEC who has a similar background like yours. Thank you for sharing your expertise and honesty with us.

[@alexanderzubar9593]

He’s right about dealers mechanics not wanting to spend the time to diagnose tricky problems. They don’t make as much money on them as they do with oil changes and parts swapping on obviously bad parts. Dealers need to change their processes to attract good diagnosticians.

[@asimrafiq174]

That is some good diagnostics approach. Excellent work.

[@jamram9924]

The first thing I saw were the dancing dashboard lights. In my professional experience, I would first check the grounds and alternator output.

[@milfordcivic6755]

If the car isn't running and the battery is charged, why would you check the alternator output? Has nothing to do with the issue.

[@jamram9924]

@@milfordcivic6755 because at times, an alternator under load can produce electrical issues. There can be intermittent issues due to bad diodes or armature inside the alternator. We’ve seen this in our shop many times and this is where we start along with checking grounds. Many vehicles can have green corrosion at the grounds over time. We just look at this as a process before we take the next steps or steps on the elimination process of electrical diagnosis.

[@otis4349]

@@jamram9924good advice. I had a 07 Chevy Silverado. All kinds of electrical issues. Dealer couldn’t isolate it as it was intermittent. It drove me nuts until it finally completely failed at 75,000 miles. It was the main grounding cable.

[@tsurutuneado5981]

Yeah, I had an accord that died during startup. One of the diodes of the alternator was bad and was disrupting the signal to the the CYP sensor on the distributor. Got a new alternator and started right up

[@jamram9924]

@@tsurutuneado5981 that’s one of the issues with that generation of Honda Accord. This engine has no cam sensor but uses the distributor to monitor cam shaft signals/movement. I experienced the same symptoms with a remanufactured alternator ended up with an intermittent failing diode.

[@programuser1295]

Very useful content - for both thoughtful DIY guys and up and coming mechanics! More videos like this please😊

[@activesloth5355]

Thank you for another great informative video. You have spent years honing your craft, and you share it with us willing. I learn something every time I watch your videos. You deserve so much more recognition

[@grcorollace]

Electrical problems are the most difficult to diagnose, hopefully will see my car in one of his videos.

[@ghostwrench2292]

Electrical problems are actually fairly simple. When they are intermittent is when they are difficult.

[@abdul-kabiralegbe5660]

​@@ghostwrench2292 Yeah, the GHOST issues are the toughest to diagnose when WRENCHing. 😉

[@coryrood]

To steal a phrase from Dave over on Dave's Auto. "Condition, Cause, Correction, Confirm" you can't jump to Correction(parts replacement) without doing Condition and Cause!

[@TEC_Stuff]

We must share the same KZbin algorithm. Haha!

[@user-li2wv3vs9f]

I watch both as well. I think AMD is a better technician.

[@TomBrucker-GoldenYears]

You are a no nonsense investigator. I really enjoy the way you approach a problem, and then correct it. We the public rely on professionals to do the same. ( sadly get it done fast ends with shoddy results) Thank you for your time and energy in making these video’s .

[@trevorcuthbert2839]

Love your videos nobody explains like you do ,keep up the good work

[@mwngw]

Stunning expertise.

[@MrAndzzeys]

I love how one man can be passionate about his job. A dream to have a mechanic like this to your car

[@teshane8784]

Man this guy should really write a repair book... Absolutely Ingenious work!

[@trailslug893]

I wish you were closer to me as I'd trust you with any of my vehicles. Thanks for being a fair and honest mechanic. Also thanks for sharing your knowledge and experience with us.

[@brucewayne2773]

Asian owner, diagnosed lucky charm hanging from rear view mirror and 2 air fresheners on the air vents. Nice fix,🙏 Car Care Nut

[@alechappy2070]

@brucewayne2773 One of the rare visually aware people. You would make a great quality control inspector

[@abdul-kabiralegbe5660]

​@@alechappy2070 You do know it's Batman so his powers of observation are exceptional, right? 😆😆😆😆

[@brucewayne2773]

@@alechappy2070 ✌

[@gabrielconstantine7384]

Great job finding the problem. Cars are too complicated today, I miss the old cars where everything was mechanical and fairly easy to fix yourself.

[@mikep509]

We should return to mechanical technology... I'm weary to buy a new car because of this...

[@redbaron6805]

@@mikep509 Not sure why people keep repeating this fallacy. Cars that were mostly mechanical broke all the time, and were considered worn out and scrap metal at 100k miles. Modern cars can easily go 300k miles plus with scheduled maintenance, and are more reliable than ever. Electronics wear out far less than mechanical parts, every single time.

[@redbaron6805]

Misses the point that cars today are 100x safer, last several times longer, and the old mechanical cars broke down constantly and were considered worn out and scrap metal at 100k miles...

[@mikep509]

@@redbaron6805 yes the modern cars are safer agreed there... plus fuel efficiency is a big factor as well.. I'm more concerned about any accident that may occur and repair costs of a tech heavy car opposed to a less tech heavy one... corrosion is also a concern, as I live in the beautiful north east American rust belt...

[@redbaron6805]

@@mikep509 Accidents are usually an insurance issue, not a maintenance issue. Cars today are designed to destroy themselves to protect the occupants, which is why they now have structures designed to collapse and crumple in collisions, absorbing the energy to protect the passengers. Add in multiple airbags, automatic emergency braking, skid control, ABS brakes, seatbelt pretensioners and interiors designed to minimize injuries, and the safety isn't even close. You can't protect the car and the passengers at the same time, one has to be sacrificed to save the other. This is why cars which got 5 stars in crash testing decades ago don't even pass today. Corrosion is a separate issue, although modern cars are much better at resisting corrosion, but obviously not impervious to corrosion.

[@joeblack3926]

As always....it is a pleasure to watch you work

[@RG-xd1gj]

I am so impressed with your knowledge and enjoy everyone of your videos, thank you!