ignition coil driver
ฝัง
- เผยแพร่เมื่อ 26 ก.ย. 2024
- In this Video we diagnose an engine only running on 5 out of 6 cilinders.
We diagnose it, and learn it has a bad ignition coil driver!
I explain how a Mosfet works and we do some measurements/tests to learn more about Mosfets!
I hope this video helps and remember;
Diagnosedan fixed it again!
Also take a look at the Diagnosedan Facebook page!
So cool, Dan! Love the in-depth explanation on the whiteboard of knowledge :) A couple questions:1) Since MOSFET driver is controlled by positive voltage on the gate, how do you know 100% that the ECU chip was damaged by the shorted MOSFET?2) How did you take care of the "immobilizer issue"? Please show us!3) I must admit that is a beautiful clean BMW...how does it look brand new?
Pine Hollow Auto Diagnostics , I tried to repair the board with a new mosfet. after replacing I checked but there was no control anymore!
Most of the time there is more damage than just the mosfet😢.
If you are really interested in what i did with the immo, you can sent me a PM on my diagnosedan Facebook page!
Thanks for the comment buddy it's appreciated!👍
hey dan i also want to know about the immobilizer. please share
Sweeeet
+Pine Hollow Auto Diagnostics Hi Ivan! Well Most CPU's work with a maximum 3.3V if you consider that the Mosfet was shorted and the history of the car said that it had a shorted primary coil winding then we can assume that +12V power coming from the coil circuit went trough the signal ECU wire and then through the shorted Mosfet getting at the end to the CPU circuit and burning it. The shorted primary coil circuit and the shorted Mosfet both became a bridge or road for the +12V to get directly to that CPU. Cheers Ivan!
Todo. Oke
Way too many shops that just scan the car and go right to replacing parts (basically guessing). Very refreshing to see a well-thought-out, methodical approach to finding the problem!
Thanks for watching!
This is an EASY one for him, did you see the BMW with the no start due to a shorted door handle? Other shops charged the customer like 3000 euro and still didn't fix it, not many even close to this guy
I will show you.... Immobiliser... reset. th-cam.com/video/uKjbw_LyJhw/w-d-xo.html
Dan, you are the man, I do wish main dealerships had the skills to trouble shoot this type of problem, their answer is to start changing modules at the customers expense without ever fixing the fault.
Thanks😊👍
I just had a Subaru in my shop that was towed in from the dealer due to dying on the highway and not restarting. Dealer quoted him an engine at NINE THOUSAND DOLLARS!!!! I scope the coil drivers, cams and crank. The cams and crank look good. The coil drivers are all over the place. Just needed an ECM. *Superman theme plays in background*
I have been in the automotive repair business since 1972, this is one of the best ignition diagnostic videos. Thanks !!
Dan, you are the man! I have been an automotive technician for 17 years and everytime I watch one of your videos I learn something new. Thank you!
Ball Zach That's great and exactly the reason why i do these video's!
I really like his videos. Simple, clear no BS talking.
Nothing like binge watching all of DiagnoseDan videos. Found your channel by accident last week and was an instant subscriber. I'm very grateful for these videos and can only hope I absorb just a little bit of what you're teaching. Top notch content!
I will show you.... Immobiliser... reset. th-cam.com/video/uKjbw_LyJhw/w-d-xo.html
It's wanderful
A another great lesson! You should teach at a school somewhere, you, sir, have a natural gift in explaining things!
I teach in the biggest international school in the world here on TH-cam.
@@Diagnosedan I should think that way. You are absolutely right!
Your instructional videos are still top notch and I thank you for taking the time to educate people.
Thanks for the comment Christian it's appreciated!👍
I think your diagnosis and your explanation are the best I have ever seen
I desire the kind of relationship you have with your test equipment I appreciate you sharing
👍😊
i watch a 3 minute ad on purpose without skipping ,since u r a great tutor.
Hi Dan I really appreciate the time and effort you take to teach us these things. I learned some of this about 20 years ago in school and understand it better with you than it was ever taught to me. Your work is life changing as I am currently unemployed do to a workplace injury and trying to relearn a skill so that I can be gainfully employed once I get better. Just wanted to say Thank You Dan and keep up the good work.
I save videos that I want to watch more than one time. This mosfet transistor made it perfect. You dive deep into stuff. I know tons of great mechanics that don't know anything about a mosfet but the produce great work. They don't want to waste their brain cells or time they can be drinking beer. Lol.but not me I'm cursed, I have to know or I can't be fast and confident in my work. I've been a scanner Danner follow forever but this channel shows excellent content that gives great visual aids and there in lies my second curse. I need visual aids to have it sink deep. I just love fixing cars so it makes all the countless hours of study worthwhile. I greatly appreciate your great teaching efforts. Your videos are better than watching TV.
Professional, exact and reliable those are the thoughts coming to my mind when I watch videos like this, however, the knowledge of the tools, components and computer's architecture requires time, patience, a lot of money but overall an excellent teacher to be reached, once again great job Dan!
excellent showing . from venezuela much regards colleague!!!!!! muchiiiiisimas gracias.
Thank you!
Dan covers it from tip to tail again.
I am so great full for your concise, clear and well spoken explanations of your diagnosis and thorough understanding of the systems and components.
Middle Cove Motors And I'm great full for your nice comment!😁
Not everyone has this diagnostic ability. Exceptional!
I would venture to guess only 10% of mechanics have this skill level. I have never personally seen one in real life.
Great video Dan. You did an awesome job explaining how mosfets work by using your heavy duty nipple clamps as a way to apply a power source. Thank you friend!
Ozzstar! Don't tell everyone about my fetish😜
My gratitude to you Dan.... Excellent handholding all the way. Thanks
Thank you Umar.
WOW!!! What an amazing demonstration with the mosfet! I had no idea they were so sensitive. Your teaching technique is truly wonderful!
Thanks Miss. Rodrigues 😁
I will show you.... Immobiliser... reset. th-cam.com/video/uKjbw_LyJhw/w-d-xo.html
One of the Best video complemation,very informative.
Great video, thanks for explaining everything in detail, been working on cars for many years and I never stop learning new things, thanks again!!
We all learn new things every day!
VERY COOL DIAG! EVERY TIME I WATCH YOUR VIDEO I LEARN SOMETHING NEW.
Piotr K Thats Great!😉
You are becoming my favorite youtube channel
Becoming? I'm not already🤣🤣🤣🤣. Just a little joke. That's a big honor Sir!💪
Great tutorial! Very well described. Like how video shows everything as it's happening and why. Trouble shooting is tough enough. Culprit is usually the 1 thing overlooked. Thanks 4 posting.👍
This is what I call a decent tutorial with all the bells and whistles demonstrated and explained and very easily understood. Job well done !!
Tom OConnor Thanks it's appreciated!👍
Fantastic diagnosis and explanation! Never seen anyone use a thermal imager for a misfire diagnosis. Brilliant. Thanks Dan!
It can be used for many things!
Dan you are a teacher. I will be watching all your vids
😊👍Thanks!
Happy Fathers day!!!!Been wrenching on my daughters car today! She is all set for her trip tomorrow! So proud of my kids!
That's great Bill, kids are the most precious things we have! I wish her a safe trip!
Thanks Dan.....You have mad teaching skills my friend, Your videos are a joy to watch!
Just a thought. It's really nice to see these fancy tools in action like the scope and thermo-imager. I think it helps show what is going on. Though most of us do not have such hi end equipment. Simply mentioning that simpler equipment like thermometers or a tachometer can be used to get the same information would be useful to some.
I understand what you saying. But my video's are educational and most people are visual learners. So to get the best understanding of what's going on a video sometimes needs these tools. Thanks for the comment buddy it's appreciated
Dan your my new bmw go to guy you know your stuff very very knowledgeable you are my new favorite channel better than a professor from a university keep it up helping humanity evolve
Ha ha,Thank you Tyler!😉
I freaking love this video Dan. A++++++ Thanks for explaining and showing us the mosfets.
Moving Up Auto Diagnostics your welcome! Thanks for the comment buddy it's appreciated!👍
I will show you.... Immobiliser... reset. th-cam.com/video/uKjbw_LyJhw/w-d-xo.html
will done , your way of teaching and fixing the problem is very interesting , thanks a lot
And Thank you for watching!
Your videos and content are so good that I already put a like before seeing it because I know it is going to be GOOD.
Continue your excellent work.
God bless you.
Ha ha awsome, Thank you!
Bro, how can this man, teaching us in ways we can really understand get thumbed down! Those people who gave this a down vote are a bunch of knuckle heads. SMH.
Special thanks to this specialized company for its error in diagnosing the ECU without which we did not see this wonderful explanation""
🤣🤣👍
Years ago i built and tested computers. We would fix them by replacing the components. Your video was very informative. Ver well explained. Very complete.
You are pure gold! Subscribed! I have theoretical applied and know about those parts in faculty but not in practice.
Thanks for the nice comment and Subscibing it's appreciated!👍
I have 4 AMG's which I'm going through electronically. Video's like this thrill me!
Great video on mosfets! Love the way you always prove the fix. Too bad so many crooks out there that it isn’t prudent to show how to recode the ECM. Diagnose Dan fixed it again!
absolutely great Dan, one of the top 3 channels and great bonus Euro cars
g johan, Who are the other 2?🤣🤣
S and E
g johan ScannerDanner and ETCG? I agree.
ETCG started all was not bad.............. Scannerdanner South Main Auto Eric O top 2 Dan 3 Ivan close to third
g johan OldSkool Funk is pretty good too, he’s great with doing things on the cheap.
Thank you again for the wealth of information you have given to us for free, it show that you can't take anyone else diagnosis and always have to do your own..
DAN, is the man top notch video and info as always thank you for what you do and appreciate the time you putting to show us all that. cheeeeeeeers
j georges Thank you!👍💪
Awesome vid. Basically a mosfet is a form of relay. I have never come across them before in my motorcycle world. Good knowledge passed on. Thanks.
I wish I had your knowledge and experience, just amazing
Thanks!
Good in depth explanation of the output driver from the PCM.
Awesome video! Loved the explanation on mosfets.
pharmer11 Thanks!💪
Me too!
Blessing
I take this class at 1990 in Dominican Republic.
Europeans have Good auto mechanic.
Blessing my teacher and you family from NC. U.S.
Thank you for the kind words
great video dan!! really well explained!! lots learnt as usual!
Carl Wensierski Thanks!💪
I love your teaching methods! You make everything so easy to understand. So organized and informative. There’s a lot of other excellent channels out there, but I thoroughly enjoy your videos! Thanks for all you do!
When u diagnose it seems so easy and obvious that it seems that other shops just dont know what they are doing. But the main thing is the scope. Without a scope on modern cars you are a bit lost. I think most tech's think you just plug in a scantool and the car will fix itself.
brian kotze very true! scantools only point you into a certain direction! The diagnosing starts after reading the codes! And a scope makes you see what's happening!
Wish I could hit that heart button too
Could use an old fashion tac. or rpm meter. That would tell you that you are getting signal to the coil or not. Testing the CPU should have shown a bad coil driver. The first shop at this point was dumb founded of course. They most likely tested the wire to the coil and it was good too. I guess that's politics today. You can't trust what anybody tells you, even when you pay to have the truth told to you.
Hi, thanks for another repair video. And we would like to know, what company did check the ECU and returned as good. Becouse they failed....
Dan is so clever in understanding these problems
great video .would have liked to see how you took care of the immobilizer
R R 😉🙈
I would also like to see how the immobilizer works are you able to show that to us or is it not legal
Seems pretty obvious the PCM needs to be programmed somehow with a code or the VIN, and it is a security feature that isn't for the public to know.
The best video on TH-cam .....i have watched lots...complet and clear to the point....just subscribed
Great video! Thank you for time and for sharing
Drews Auto Thanks😁👍
HI Dan, it's amazing that the PCM even functioned at all after taking high amperage/voltage, thanks for the in depth explanation. Electronics was my favourite shop course in high school and you brought back good memories with that MOSFET, break down.
I will show you.... Immobiliser... reset. th-cam.com/video/uKjbw_LyJhw/w-d-xo.html
Glad I bumped into you !
Glad to have you here!
The demonstration was fantastic. It takes a lot of work to set that up!! I’m rewatching a lot of the old gems. I c u have the same M12 ratchet I have. Light and fast.
Awesome work sir. I have question about three wire BMW coil. We have power supply to primary coil through fuse and PCM provides ground to turn primary coil on. Why do we need ground wire on secondary coil. Isn't spark plug grounded through engine block? I hope this question make sense. Thank you again for this outstanding diagnoses and tutorial. Cheers my friend.
KY Home Garage KY Home Garage It makes a lot of sense and this is actually a great question! That wire goes to ground thru a resistor. The PCM monitors the voltage drop across the resistor. This way it can monitor if the secondary has fired. So the short answer is that it's used for misfire diagnosis.
Thank you for quick explanation my friend but I am still confused. How can PCM monitor that circuit? BR wire on pin 2 is not connected to PCM. Is diagram incomplete?
KY Home Garage KY Home Garage sent me a message on my Diagnosedan Facebook page and i'll show you a picture!
please closely look at a toyota/lexus schematic for their ignition circuit-they use an igt and an igf. both will shut down either one coil or all of them. misfire diagnostics and circuit protection. 4 wires per coil.
WOW.. Excellent Explanation Dan. All these times I can see paper or theory about mosfet and transistor. This is the first time i can see thru my real EYES. :). Best Video ever seen. You are top notch.
Thank you😊👍
👌 very clever fix, now .. where's the inmobilizer fix video❓
Not there 😉
check this out:
E36 immo by pass/ r/r with older brown bosh ecm test
th-cam.com/video/pnR7QL2J0A8/w-d-xo.html
Legally he cannot show you this fix but I believe it involves switching out the data proms
This is a very good video and I am impressed with Dan's knowledge. I'm a retired Electronics Technician and I"ll bet the smaller IC chip just under the pencil at 16:33 is the driver chip that drives the power Moss FET transistors. and most likely it is also bad. The actual processor chip is probably good. Most of the time the processor needs a little help when it comes to driving power transistors so there is often another IC chip between the processor and the output transistors. The thing is, where can one find an actual schematic of the complete computer board? Most of the time you can't and without it, you are only guessing. All said a great job on this video!
Great job again like always A+
Thanks!
wow, i really love your approach to diagnosing problem.Really want more of it.
You should run your own diagnostics school you explain things very well
John Green, One day maybe😁
Agreed top work Dan
You explain things really really well. I too think you should run a diagnostics school. Keep up the videos. Thank you
Unfortunately teachers are less pay than doers.that’s ironic
Nevertheless Dan is an exceptional technician and teacher as well, after all Dan had great teachers who pushed his passion to a professional level.
I agree, he is a superb teacher 🤙🏻
Incredibly valuable video since it's hard to find in-depth videos that cover both the automotive diagnosis as well as the associated electronic component level circuitry. Typically it's just "The PCM is bad and here's a new one. Fixed!". Great work.
Glad you like it!
Late to the party here but it really amazes me how many shops attempt to do this type of work either without a scope, or they have a tool with a built-in scope and have no idea how to use it. A dead ignition coil driver should be a trivial thing for any diagnostic technician, and your video demonstrated the process very well. It also demonstrated how such a simple diagnosis was out of reach for the other shop, yet they attempted the repair anyway. which basically means they read the misfire code and replaced the coil and plug for that cylinder. If you don't know how it works or how to test it, don't replace it!
Another fantastic video, Dan. Most of us just install another PCM without thinking about what actually happened to the failed one. Very interesting.
Thanks!😉
1:23 You should name-and-shame this "specialist" PCM testing company! Were they made aware of the cost/inconvenience they caused by saying there was nothing wrong with the module?
I know this company very well and normally they are very reliable. So no need to name-and-shame them.😊
@@Diagnosedan What percentage of the time are they reliable?
@@kcuhc84 working with them years never made a mistake before
@@Diagnosedan Did they at least reimburse the customer for your diagnosis? A reputable company would have at least done that as the first shop diagnosed it correctly.
@@tiredoldmechanic1791 i don't know.
Very very very informative and clearly explained. God Bless you and ur family. Thank you and appreciated...
Thank you Dan for your great work and for the time to show us :how to diagnose. Respect.
You are the Godfather of Diagnose. Love your Videos. Nice greetings from Germany
Sascha Rink Danke ihnen! Gothfather of diagnose🤣🤣🤣👍
Awesome your technical clarification with whiteboard and waveform explanation, and MOSFET explanation. i don't know appropriate ward except thanks of your knowledge sharing without pushing of premium video. You are great..
To hell with overpriced seminars ! We have DAN !! Keep up the great work mate !! :)
Ha ha 🤣🤣🤣
It's so refreshing to listen to someone smart nowadays.
Dan I love you very much because you are a good teacher...MAY GOD BLESS YOU AND YOUR FAMILY I am from MALAYSIA...but my daughter is working in HOLLAND.. mechanical engineer...I will definitely come to see you sir..YOU are a Very good MAN...I have learned a lot from you...bye
Another great DiagnoseDan video, where we see what is possible, if you have the knowledge and the right equipment.
😊👍
Again, a simply fantastic educational video, thanks a million Dan.
You're an excellent teacher and a superb diagnostician.
Thank you for everything.
That thermal gun application was awesome, Great video 👍👍
Excellent demonstration, well done, Dan !!
Thanks😉
cool. nice to see the mosfet visually instead of imagining it.
Exactly, we are visual learners!
one of the best diagnostik videos
Thanks!
Good diag and you explained mosfet very well pitty you couldn't solder another one in and repaired it you are an extremely talented technician
David Lee Bennett, No like i told in the video the bad Mosfet was not the only problem!😁. Thanks for watching!👍
I subscribed. Really enjoyed the clear explanation and that neat method to c which cylinder wasn’t giving any heat
Bill Rimmer Thanks for Subscibing!👍
Great video Dan! I can't believe the other shop sent the DME for repair and they told them it is working properly! I have to say you are doing an amazing job with these videos : you've got humor, knowledge and great detail! 👍👍👍 Thank you so much for the videos!
Nick Nicu Thanks for the great comment it means a lot to me!😁
I don't know how i ended up here, but im just glad i did, sometimes its even hard to believe that all this information is for free. Thank you soo much
Diagnose Dan fixed it again! These videos are in a class of their own. Nice to see some quality, intellectual content still out there instead of click bait and opinion pieces.
DJ R Great comment! Wow Thanks!💪
Great video , perfectly explained easier to understand wiring diagram
John Avila Thanks Sir!🤩
Finally, somebody on TH-cam who knows what they are talking about
Thank you but i'm pretty sure there are more than one persons on YT who know what they're talking about🤣🤣🤣
Beautiful !!!
Out standing diagnosis with knowledge .........
Nice to hear that you order all parts properly. No messing about 🍺🍺
Congratulations, you are the best master I have ever seen.
brane pecenica Thats a Nice comment it means a lot to me!😁
another great video nice to see a fellow tech trying help and pass on info to help out others i like the way you allways speek so none tech can undersatand very nice i work in the ecu field again thank you for the videos you take the time to do all the best from the uk
Thanks for the comment it's appreciated!
DiagnoseDan is awesome! He knows cars and electronics! Freakin rare eh! Makes me want to play with my Megasquirt ECU again!
Thanks you! Thats awsome comment 😉
Cheers from Canada @@Diagnosedan!
i miss my old 323i E36 so much, another great vid Dan.
Thanks!
Amazingly good, especially moving towards a final fix. Huge help for us diy home mechanics.
Thanks for watching my video's it's appreciated!👍👍
Best MOSFET explanation ever!!!