99 Subaru Impreza No Start, Ignition Coils Fire With Key On!
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- Опубліковано 4 жов 2024
- Don't have time to watch this full video? Here is the "quick fix" version • 99 Subaru Impreza No S...
Join me (Paul Danner aka ScannerDanner) and my class at Rosedale Technical College while we troubleshoot a no start problem on a 1999 Subaru Impreza.
This was an unscripted video, everything was filmed live from inside my classroom, with all of my students involved. For each new step in the diagnostic process, I pause to explain what we are doing and why, so this is a longer video than my normal upload, but I promise it will be worth it. Even you veterans that are following me will learn some tips along the way.
If you are looking to go through auto technician training program, I would love to have you as part of my class in person! We are located in Pittsburgh Pa. For more information about Rosedale Technical College go to www.rosedaletech.org
Special thanks to PicoTech.com and Mitchell On-Demand
For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium www.scannerdan... There is a 14 day free trial.
On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!
Disclaimer:
Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC. - Авто та транспорт
HIE PAUL, IM A 22 YEAR OLD MECHANIC STUDENT FROM SOUTH AFRICA AND IM ATTENDING ONE OF THE BEST LOCAL SCHOOLS AROUND HERE BUT I JUST WANNA TELL YOU THAT I NEVER CAME ACROSS A TEACHER LIKE YOU. I AM FOLLOWING YOUR VIDEOS AND THEY ARE VERY, VERY, VERY HELPFUL TO ME I DON'T KNOW HOW TO THANK YOU MAY GOD BLESS YOU. YOU ARE THE BEST!!!
Loved the detailed explanation on how the coils packs actually worked - clear, precise and extremely helpful on correct diagnosis. One thing is undisputable Paul - your time, effort and unbelievable knowledge have no doubt helped thousands of people, both in the trade and the DIY man. That is something we need to be very grateful and supportive of. Technicians like yourself are quite rare and a refreshing change to the all too common parts changers.
+mrghiax thank you so much. I really appreciate your kind words.
so yes, all powers and all grounds should be checked before ever replacing a computer
You are so appreciated for you instructional lessons.Thank You Danner Scanner. The BEST Instructor, Instructions and camera crew, Family Members too!
Thank you so much!
I have probably watched this video before. But it’s been along time. It was better the second time, especially since I’m changing a computer today. Super thriller. Better than a movie!!
I've learned a lot from you and still learning i can't find no better teacher than thanks Paul
Scanner Daner
I guess we get more information on you tube premium I'll order it I'm 72 bought a BlueDriver I thought its easy and most is but I guess l need to watch a video to get all out of it Thanks again Paul
Love your vidios
1 minute in and i'm hooked, i can already tell this is gonna be a good one, not unlike most of your material!
Who dislikes these videos? The same people that complain about the insulation piercing probe?
Great video, sir!
Paul. Definitely one of the reasons why I follow you on your premium channel. Excellent. Excellent. Teaching. Scanner. Danner
Paul great job I'm training a new guy and he told me he wants to get as good as me I told him he needs to buy your book so he can really understand it i am a master tech I told him to read the book and I will show him he ordered your book so now I WILL work harder with him thank you for everything I wouldn't be where I am today if I never found your channel god bless
Wow, thanks so much! That is really awesome to hear my friend.
I enjoyed watching this, but was afraid it woun't turn on. Glad it did.
I started watching your videos instead of movies, and this one is for oscar :)
You are truly a strong person. May god bless you in all that you do.
funny story on that. Subaru has two separate parking light switches! On on top of the steering column that lets you turn the parking lights on with the key off! stupid design if you ask me. One of my students (who works for Subaru) came over while we were troubleshooting it and flipped the switch off. I felt pretty dumb :)
You are many things, but dumb isn't one of them.
A perfect example of getting buttonhooked. You didn't know they were gonna buttonhook ya.
Excellent Video, Paul. It's never easy to point at a component that costs as much as a PCM and blame it without spending a lot of time making sure you're right. But diagnoses like this take a great deal of time and still must be paid for. I wish owners would realize this fact.
Only other remark I'd make is that there is usually documentation which describes the operation of a given system, such as 'the PCM grounds the circuit on Pin 39', but you have to look elsewhere in the manual. For me, the time spent doing that is less than 'I don't know what's hot or not'. Please understand that I also realize that you're teaching why the thing worked in the first place, which is absolutely necessary to finding out why it DIDN'T.
Keep up the good work!
I only checked one sensor ground, but I did check 5 or 6 separate computer grounds. Just because sensor grounds look good does not eliminate the need to check the other computer grounds. Especially when it comes time to call a bad computer.
ScannerDanner is the man.....The best diagnostic technician on youtube...
I wouldn't argue that Tom. The reason I didn't, is I wanted to test everything as it was. Just in case I disabled something and it changed my test results.
Wow! you really got me going on this one, I've had to stop the video several times during its course to match my thought process to yours as you were going through each step of your diagnostic by eliminating all the variables that could have potentionally created this problem, critical thinking was the key to finding it. I can thank you enough for sharing this and make us think.
Awesome video man. I sure did not mind that it was over an hour. Every bit of it was interesting.
Great video Paul. Just goes to show how as techs in this industry, we have compond problems brought in for us to repair everyday. But by using proper testing techniques we can make a positive diagnosis and repair. Thank you again for all you do to help us make the informed diagnostic repair..
Mr. Danner Cant say enough Thank yous to your teachings every video you post is more knowledge to us all whom follow you. THANK YOU.
I have ran into this problem before. There is a green test connector under the dash that when put together puts the ECU in test mode and it energizes components in engine compartment. The fix was just disconnecting the green connectors.
i knew this video was goin to be long, like u said, but was really informative, and great video too for the auto tech that really wants to know how to troubleshoot correctly instead of just guessin and throwing parts. Sometimes i get intimated with your videos, but absorbing many things your are teaching, thanks again for your tips etc.....
Thanks brother. It will make more and more sense as you continue to follow along. So keep watching and I'll keep producing okay?
okay
This was an older video right think I seen this before great video though always like watching your videos over again helps keep my knowledge thank paul
hunkydude322 throwing parts is not only stupid but it’s expensive and never helps you to make real money and be valuable in a busy shop let alone fix your own vehicles effectively. Testing and results to prove why your replacing that part and not checking wires and harnesses.
Absolutely outstanding as always I love you thought process and also how you take into account all possibilities creates a great route for troubleshooting
+Fausto Gonzalez thanks bro
Outstanding Paul,
Great lesson in troubleshooting. I always learn additional techniques when I view one of your videos. It was good that you emphasized that NO sensor input into the computer would cause the CPU to a continuous driver condition to the coils. Enjoyed as always !!
Pete
I love no start diagnosis. Don't know why.
I love even more learning about different no start conditions.
Yet another awesome case study! I was in so much suspense, waiting to see if it would start. If I recall correctly Subaru has been known for parking light issues I found your channel through Eric The Car Guy, when he was talking about Diagnostics on his ETCG1 channel and I've been hooked ever since.
Great Job Paul .... you an your students .... very informative as always an i love how you take the time to not only explain what your doing but why your doing it a certain way. cheers an thanks ....
Thank you Scott!
great video man, I always have that un easy feeling in the pit of my stomach when I have to condemn an ECM.
yea, in hindsight I should have changed the oil first. I just wanted to hear the engine start before spending another dime on this thing. I would have hated to do an oil change only to then tell him his engine was shot.
Also surprisingly, not damage to the injectors or coils. It is running great!
Thank you so much Carlos! It would be great to meet you too someday. If not maybe I will see you on the other side of eternity. May God continue to bless you in this field and expand your abilities 10 fold, and may we both remember where it all comes from
I'm not a professional technician--or training to be one, I'm just a guy that likes to fix my own car, but I love watching these videos. Know what I watch on "TV"? Game of Thrones, Breaking Bad, Walking Dead, and the ScannerDanner channel. The only problem now though is, when my dome light burns out, Paul has inserted into my brain all of these other scenarios it may be---How do I know it's just a bad bulb and not a bad computer ground? :) Great Vids, keep 'em coming!
HI mr, dinner. your class training videos on UA-cam. makes me become one of the best tecnician in company. thanks for giving me help.
good job to you and your students on that one, crazy.
Another Paul Danner masterpiece. Thanks for another great video. You've really helped me to learn the Pico software too, thanks man.
Since watching your videos I really find myself doing a lot more with my verus. And even just using my test light in ways I never used too. Thank you sir
and me ,snapon scope and scope on a rope ,power grounds,5v ref,he is exellent teacher ,i am not scared of ecu,wires any more,pull up diagrams,plugs,back probe,drop test ,love it now,nice buzz when car fixed too
Awesome you capture the "magic moment" on camera ;) Really nice for the viewer.
It's a little to complicated to post here. In short on thermistors, the 5v reference is also the signal wire, where pots. and psi sensors, the 5 v reference is separate from the signal.
your videos are extraordinary you always come up with unprecedented and unpredictable car problems thank you in advance. your follower from morocco
Thank you!
I would like to see the old computer re flashed. I would be pretty sure the flash has become corrupt. loved the video. Also what did a scan tool do when plugged in?
I remember as a Kid rushing home from school to catch the newest episode of Bill Nye the Science Guy...Now i do the same thing when i get off work, but i head to my laptop to watch ScannerDanner's videos. ;)
This video was fantastic....thanks for sharing your knowledge. I'm sure the car owner was happy to have his car back on the road again!
Paul - students, you did a great job, thank you very much for this valuable lecture, greetings from Greece!
Wow what a mission! This engine was sounding scarier and scarier as you tried to crank it. I had a feeling that once you got to the injector circuits that there was some huge input problem or strange wiring like they used an injector positive signal to the alarm horn or something. But the surprise everything checked out good. Amazing video! Keep em coming I want more videos!!!!
Really dificult to tell which of yours videos is the best but maybe this one. The amount of knoledge and experience put in this case is tremendous. Like you said most technicians would put jumper wire seeing that low voltage, and vent round in circle.
The amount of risk shown in this case is huge. Where I live many people think diagnostics should be free. I post this video on forums and ask them should this be free. How many people are capable of sorting this out!!! I know many cases where people put large amount of money in parts changeing and still not fixing the car, just because they woun't pay proper diagnostics fee.
Always at aww how u dissect a system and how it works is just wow !
noise on the sensor ground is the same noise that is on the reference. so a simple difference in potential voltmeter reading cancels the noise.
this is why sensor grounds go to the computer instead of the block.
Buts its good to go threw the motions. Gives a good insight on system design and operation.. Interpting wire diagrams is a big weakness to me and I'm sure for a lot of ur other virtual students..
I've only called a scarce few computers through the years, and I absolutely agree with you, it's an extremely stressful uncomfortable decision to make.
So far, I've personally been 100% correct... but have seen scores of them needlessly replaced by others.
Another fantastic video Paul. I love watching videos like this when you find engine problems.
Yes they are all mine. And the beautiful woman in that pic is their mother. We've been together almost 21 years. Married for over 16. My character? I hope my actions and words show some if it, I most certainly don't always honor my Lord with how I act but it is my greatest desire, to please Him.
Knowing the forgiveness of God through the death of His son enabled me to forgive my step father which freed me from the poison of hate and anger
lol guessed ECM at the get go. Always good to go through all the steps and gather evidence. That's crazy though, you would have thought it would enter a Limp mode not just completely die. Good fix Paul!
Brenndon McGill crazy shit happens with electronics if you don't know what you are doing. The best thing is to change the fucking battery every 3-4 years to avoid jumping the car the wrong way. I had seen a starter stay engaged after the engine was started up, on a Subaru too. Starts up fine, but I hear some grinding noise sounded like a fart for like good 10 minutes, before I relalized the starter was still on. Ended up cutting both battery wires to kill the car. That one too had a dead battery, and all kinds of gizmos went haywire after jumping it, like I used to do with old cars.
Well that was exciting. Always a good day when something doesn't blow up. In hindsight is there anything else you could have done? I would have been uneasy about sourcing a new ECU without signs of damage like burned traces or blown capacitor. I think you just set an excellent example (role model) for your current class on how much needs to be checked before calling it bad. Great video. Thank you.
Great video as usual Paul
loose connectors and ripple on supply lines in electronic modules can corrupt flash memory and eproms
some very good information
Paul,
Another great video; what a weird one. In hidesight, (and you mentioning that the injectors were warm/hot as well), I think disabling the fuel pump and the injectors before doing all the cranking/ignition on only tests would be a good safeguard practice to follow going forward.
Tom D.
Absolutely incredible training ! Bravo 👏 have not seen anybody doing education like this since my time getting my associates degree at thaddeus stevens collage under Dr Burkhiemer
Thank you!
Paul 11/10. Loved it. I came to your channel yesterday or the day before from Eric the car guy's channel when you did a video with him. Glad I did. Spent some time learning about pico about a month ago, and now you have shown that you also use pico scopes, the dotted lines are connecting in my brain taking me in the direction I feel comfortable in. Awesome cant wait for the next video. Scopes away, ha ha
Awesome man! Just go to my main youtube channel page and under the search for videos sections type in PicoScope. I've used key words on all of my videos.
Thanks!
Hi mate. So I have subscribed and was just going to ask you about whether Mitchell on demand was for European people as well, when I read your message again. You say just go to your page and type in pico. Where is your page exactly? Can you send across the link. You don't mean the premium channel that im subscribed to?
Forget last message, as I found it.
Amazing diagnostic!
Oh! Thanks for keeping it real when comes to replying back to viewers questions. I know its hard with so many subscribers , man I don't what u are going to do when u hit 100grand.. Cause its coming word of mouth is a mother
Great! I would have jumped to investigating wiring to fuel pump. Remembered a similar pattern of the amateur pulses of a fuel pump you had tested. Key phrase, would have.
That was a good exploration into the system
and it happens, but you
Fixed it there was no outside faults triggering
The computer just faulty
Parts inside computer.
When l heard the cooling
fan on with the ign on was a
good indication that the computer had gone bad,
But it still could have been
a wiring short, but it wasn't
Good video well explained.
Another great video Paul. A long way to go to confirm a bad ECM, but worth the trip and very informative, even for us old farts;-) I really do believe it was the jump after the dead battery that did it in, but we'll never know for sure. Using a charger in jumpstart mode on any new car is not a good idea. If you have the radio on with the charger connected, you'll hear what I mean. It could have also been reverse polarity jumped, common mistake.
Excellent video. A very difficult diagnosis because a "smoking gun" was not found. You pulled a "sherlock holmes" who said "when you have eliminated the impossible, whatever remains, however improbable, must be the truth". regards
Thank you my friend
Excellent case study.
Hey Paul great video as usual. I've had personal experience of a bad/loose battery connection destroying an engine computer. Except in my case it was easy to diagnose, the smoke and horrible smell from the computer gave it away lol
I totally agree. Smoke and smell are extremely helpful to locate troublesome electronics. In fact I can't think of anything else more helpful to quickly locate. LOL 😂
and this method is more general and can be used on any thing vehicle that is computerized airplane , boat , car , truck ,...etc with an equivalent ecm module , wire diagrams , and sensors/actuators
Great video. I wish I would have had you in my school when I went.
I want to learn how to read electrical diagrams, Thank you so much SD.
keep following me and I can get you there, especially on my premium channel which is on my website at www.scannerdanner.com
Really good video ScannerDanner ! To bad i live in the Netherlands, i would love to come to a few days of school with you !
+Lars Greefhorst and we would love to have you! But I realize that is not possible. You can join me on-line on ScannerDanner Premium. Let me know if your interested and i'll give you a coupon for a free month.
+ScannerDanner I would love that !
the obd 2 scan tools may indicate a bad sensor or bad module but some time the sensors and actuators could be good and it is a bad wire so one would beable to fix or trace wires and know how to find shorts or opens much more easier with the color code wires and wire diagrams
Scary call...
Sort of OT, but eons ago, had cust with an old Ford Country Squire wagon, that had a mechanical fuel pump leaking fuel into the crank case. Dip stick indicated maybe 9 - 10 quarts.
Against my advice, she elected to resume driving it.
Later learned she'd had a crankcase explosion that blew the pan/valve covers off, & started a fire that destroyed hers & several other cars in a supermarket parking lot. Luckily, there were no injuries...
That is incorrect. That function DOES NOT cause the injectors to stay energized all the time, nor does it fire the coils. Also the green test connectors were in their normal unplugged state.
You mentioned problems with Mitsubishi computers. We've had a lot of tcms fail after a jump start. I think the extra voltage must be too much for these older modules.
and then again you could have many modules but if there is always a way to get the wiring diagrams , DMM , test light (for making it easier) , and the ODB 2 scan tool that should be all that you need to diagnosis any electrical problem as well as a bad sensor /actuator
really good video Paul i like the way you explain the igniter inside the coil , never knew that having externals powers and grounds to the coil would have internal transistor in the coil really good info,I wonder what screw that pcm??You think that the loose terminals in battery had something to do with that??anyways thanks for this information i watch your videos all the time ...keep it up
What happened to the parking lights being on all the time (pulled fuse)? I assume it was unrelated to the no start, i.e. there was no cross power feeds?
look at the pin out of the ecm from there you get the colors of what each actuator and sensor has so unbolt ecm quickly uses the wire diagram with it and the fuses boxes then go from there to the obd2 to see what sensor or actuator is troubled ... and from there tracing the specific color wires if need be
Bravo; this was a challenge for sure!
yes is the wiring diagrams for all the makes and models available some sort of site that allows you to plug in your make and model and download the wire diagrams for your chassis and ecm tcm bcm modules color of wires allows one to determine the which actuators and sensor or what
scanner danner you're my hero!
It was a no com. and I do not have flashing capabilities for this Subaru. Do you think a corrupt eeprom would cause the injectors to be on all the time? I find that unlikely, but then again, I really cannot say from experience what a corrupt eeprom would do. What are some symptoms that your have seen with that? Thanks!
Man i spent 2 hours watching this one, this was a real head scratch-er, I loved it! Didn't you say you had a inkling that it was the PCM from the beginning?
I don't remember :-)
Hello, ScannerDanner Thanks for all your Video demonstrations. Hey, I bought your book... unfortunately I haven't read it for a while. My problem is: I don't remember how to access it.... can’t remember the link. Can you please help us to find it again?
Great vid!! I work at advance auto they told me that another store changed a battery on a BMW and use a 9 volt battery in the cigarette lighter to keep the memory. The guy drove away about a mile and the car shut off. They took it to the dealer and had to have a computer put in it, so changing or letting the battery go dead can F up a computer don't happen that much but it can happen
Great video as usual. I liked the format, too. Makes you feel like you were there and it really helps to see the thought process. As a side benefit, I got to learn more about the pico right when I am agonizing over whether to purchase or not. I think I will. Do you have a preference on pressure transducers?
There are some on eBay that are custom made which are way cheaper than the one from AES. You don't need the details that the AES offers when you're checking some sort issues with compression, I got the pressure and vacuum sensor one.
At minute 16:30, could you make a brief explanation about the DC and AC coupling when obtaining the activation signals of the coil and the inductive sensor? I'm trying to figure out what you're saying but I don't understand exactly. sorry for the disturbances
Greetings from Peru, excellent video. Thank you
I have some videos on using AC coupling in my battery, starting and charging systems playlist. The one I'm thinking of is an alternator with a bad diode.
Thanks Robert!
and I just got what the bcm module is used for if it is not integrated into an all in one ecm/pcm . bcm is the module that does the processing of power windows , door locks , wiper or lighting like dimmer sensors ,...etc basically any electrical components that is not engine sensor/actuator (engine specific sensors)
no go there. battery was stone dead, so the ecm was "reset" multiple times.
I've been thrown the same thing with a dodge neon thay said it was jump started in the rain but couldn't get it to start most likely crossed the cables and so I put a new ecu in it and it runs fine
The most likely source of the failure was hinted at. Voltage spikes was mentioned. I would look for evidence of an alternator replacement. Alternator and computer may have been damaged by reversed polarity. Alternator would have shorted diodes and maybe open fusable link. Computer may be damaged and had blown fuse. Is the computer fuse cleaner indicating recent replacement? Sometimes a little forensics can reveal some hidden history and point to the root cause.
you said this was a kill switch of sorts and to do that it would be wired into the coil wiring at some point so maybe when they unhooked the alarm wires they crossed them? don't know just thinking
The Worlds Greatest Detective in the automotive world - (Paul danner)
bat cave server - mitchell server
hand tools
batrang - testlight
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Thanks Mr. Danner.
yea, in hindsight I should have changed the oil first. I just wanted to hear the engine start before spending another dime on this thing. I would have hated to do an oil change only to then tell him his engine was shot.
Any particular reason as to why you cant share a reference for a thermistor and a potentiometer
Sorry if its a silly question but i really would like to know why
Thank you
great video as always paul. hey when you put the fuse back in for the parking lights, did they turn off??
Hi Paul, since Ground is shared across sensor, you still went a head and checked the ground of all sensor, usually u check only one .. do we need to check all sensors ground from ECM or pCM, pls advise.
Another great video...Thanks Paul.Love the e-book by the way,it helped me fix a few problem...
Scanne Diane thanks for the video on the fuses that are not on that 96 1500 5.7 should I have a alternator it's got two plugins plus your hot wire but only got one wire going to my plugins is that normal or thank you