Eric O from South Main Auto calls a test light a "scope on a rope" Love it.

I'm from California, getting old but always want to learn..you can always teach old Dawgs new tricks.

I'm going to tackle the Subaru this weekend again, 2 hours drive but now I have a little more knowledge from you dude, right learning experience for me. I'm surprised you don't have more subscribers and likes.

@ScannerDanner

3 жыл бұрын

Tell your friends 😊, thank you!

You should have more and hope to see later to Hit that 1,000,000.00 maybe more for your Channel. You are very Informative! Wish I had found you sooner.

Excellent video again.im learning new things everytime i watch your videos. The npn just really hit home. Im using a verus pro and it is making life easier. Your premium channel verus training is great and now its just practice ,practice and more practice.

@ScannerDanner

9 жыл бұрын

jimmy neutron thanks bro!

Clear and percise, the details you discuss are the best part

@ScannerDanner

9 жыл бұрын

Thanks Ozz!

Great job explaining

To your student who was asking about using a regular test light versus the other type.i apologize , I for got the name of it.but you do not want to use the test light with the circuit board. It will burn up like Melba toast.lots killvolts in that ignition system.the circuit board does not like all that power.i tried it.my regular test light was at home and I was in a jam. Thanks for all the great information.

Love yoir class room on the Subaru keep up the good work, did you use the students led light?😂😂😂

Really appreciate this video on how to...with basic tools. As a suggestion, I would like to ask yo to upload more such videos since not all of us have the access to expensive gadgets as the ones you usually make use of in all of your videos...but is just a suggestion. In any case, your contribution to the learning and gain of experience for the rest of us is really appreciated and I thank you for that. Salutes all the way from central Mexico.

@ScannerDanner

9 жыл бұрын

ssaavedrato I will be doing more "basic" tool stuff for sure. Thanks!

Muy buena explicacion señor danner

awesome video thank you for sharing your amazing knowledge. blessing for you and your family

@ScannerDanner

6 жыл бұрын

Thank you!

Thank you paul

I got everything else but how does the computer add resistance to the transistor to protect it?

Excellent demonstration on getting good results with basic equipment. Myself I find the use of a scope does have a learning curve but it's getting to the point now as the price for a good scope as you have displayed is under $200 for a DIY'er . The price of diagnostic equipment is relatively inexpensive but the required knowledge and hands on training is not. For a person to watch your KZread videos is an awesome insight to diagnostics and if you want to select the Premium channel , well for me it was invaluable but if I had the opportunity in enrolling in a vocational collage like Rosdale with hands on training that would my first choice. I wonder Paul if you have had students that have a hard time reading information and find only hands on training actually sinks in as is my case. Take Care Steve

@ScannerDanner

9 жыл бұрын

Steve Rob You need both Steve. The on-line stuff or the lectures is only half the battle. Applying it in a shop environment is when you really learn. But you MUST be able to follow the lectures and material to be able to use it in the shop. It may take a lot of re-enforcement but this is one subject you cannot learn by just doing it. Say like a brake job.

@SteveRobReviews

9 жыл бұрын

Oh I can follow everything I see you do on a car its just when your teaching the theory and multiple "variables " this is my challenge . Circuit design throwers me off when I can't actually test it and find a fault. It all comes with repetition when a fault occurs but until then it doesn't sink in. Great analogy of the break job , I can watch one do it but it's not the same when you try it the first time. Danners last vid, hope you seen it, I followed that great only because he went from the bad side to the good and showed the difference, now if he started telling me there are multiple variables and this testing doesn't always work , well I'm going fishing. Ha I learn the hard way and try not to blow up too many cars- hey Paul our friend Matt - I go fishing quite a bit HAHA . Take Care Buddy.

@ScannerDanner

9 жыл бұрын

Steve Rob thanks Steve. Always appreciate your feedback. And there is always room for improvement with all of us. I know you're not telling me I need to do that but I am always thinking of better ways to deliver the material, so thank you again for the feedback.

Hey Danner. Thanks for the video. Just wanted to say, that we need small current to flow from base to emitter to open a transistor. It is not a big difference. Just wanted to be correct on this one. Still You are doing amazing job. Cheers!

@ScannerDannerPremium

9 жыл бұрын

Are you talking about my open ground variable I was talking about? If so you are correct. What I should have said was a high resistance ground not open. If it was open the base circuit would have never energized.

@arvydaskraftas6358

9 жыл бұрын

This statment is also correct. But i was talking about transistors in general. You have sad, that we need small voltage to open a transistor (close the switch, make a loop). But we need a small current to flow from base to emitter if we want to do that. And yes, we can make that current by adding voltage to the base of transistor.

My head is hurting for too my info, but im learning Dude..

I love watching the diagnostic process tick over in your head like a machine. Thanks again for the education. Two dumb questions: 1. When you take incandescent test light to ground on control wire, given that circuit design is for very low mA, how do you KNOW your not going to blow the computer internals by grounding through a low resistance test light. Can you assume that ALL base switch currents to an external Transistor have an internal ECU resistor limiting the current flow and doesn't just rely on inherent resistance o externalf transistor base circuit? 2. When you measured current flow on coil wires to diagnose current and shorted coils, if the coils were shorted would they not be drawing constant high current ... would we have seen this on the coil feed Batt wire and would that be a valid test for grounded coils in this circuit? thanks again Paul

@ScannerDanner

8 жыл бұрын

+Alex Messina question 1 , watch this video kzread.info/dash/bejne/h6uFuMlpc9fRpbQ.html question 2 by shorted coils, I am referring to copper to copper winding shorts, not shorts to ground. So no, they would still be pulsed. (good question!)

She is very smart at 10:25. At 26:37, Paul explains why a digital voltmeter's sample rate is no match for an oscilloscope. I'm assuming that the dual coil circuitry in that video is for failover/redundancy reasons by design. These are very powerful videos for problems that are very enigmatic for some in the field of automotive circuitry to understand. I actually learned alot from these videos.

@ScannerDanner

8 жыл бұрын

She was smart John. Her name was Nicole and she is no longer with us. Unfortunately she died of an overdose of heroine. She was 2 years clean when she came through our program. Goes to show you can never let your guard down. That has to be the most horrible destructive drug out there. On a good note, thanks for the comment. I've seen your name a lot lately, it's super cool. Did you see the actual case study video that matched this lecture? The 2 coils were from a 4 cylinder waste spark ignition system. (1 coil for 2 cylinders)

@ScannerDanner

8 жыл бұрын

kzread.info/dash/bejne/i3Z5mcVwnMnTnrw.html

@JohnDoe-uq3mx

8 жыл бұрын

Omg for Nicole. May God bless her soul :(

@JohnDoe-uq3mx

8 жыл бұрын

Paul, I think I get it now. Two coils per 4 cylinder engine.

@ScannerDanner

8 жыл бұрын

yep, one for every 2 cylinders. It's called a waste spark ignition system and it fires each cylinder once on compression and once on exhaust. The exhaust event is "waste" as it doesn't do anything but provides a return path for the electrons.

Hello and good day. I have a 96 impreza with a 2 litre engine and I have kinda hit a wall. Control on one coil. No control on the other one. Pulse from ECM to the igniter on the coil that is firing, no pulse on the other one. Cam and crank sensor ok. Replaced ECM. Still only firing on one coil. With the multimeter I get roughly 3.5V on one signal wire from the ECM to the igniter( seems right for a 5V pulse), on the other one I get only 0.5V. I am at a loss here. Hope you can help.

Hola q tal soy de México y me interesa saber más sobre tu libro. Dónde podría encontrarlo

Hey Mr Danner, great video but when will the premium channel be available in Trinidad and Tobago.. you are really my inspiration...Thanks allot for these videos.

@ScannerDanner

9 жыл бұрын

Rayon Roberts I'm not sure. In the mean time look into using a VPN. Email me through my website and I'll give you more info. about it.

@chiefeaglebear2320

8 жыл бұрын

+Rayon Roberts that is so cool to see peope all over the world that want to be good techs its inspiring if you make it to anchorage we can talk diagnostics/automotive and i sure would like to visit trinidad tobaga god bless!

I want to ask your opinion about attaching the primary coil power connection directly to battery (because of voltage drop)? Ignition coil in my case is mounted on a module and the module has transistor. If the transistor controls the ground (on and off), then attaching the power side of the primary circuit to the battery should not have any disadvantage?

@ScannerDanner

8 жыл бұрын

+Syed Imran Shah that would be correct, but these are usually ignition positive feed. meaning they only have power with the key on. But as you described, with no ground from the module, there would be no current flow so you should be okay.

If I'm only getting .68 or something like that an not getting 2.68 on my tester going in to the igniter way wood be the problem

At the end when you were talking about the coil being shorted, could you not just measure the secondary resistance to see if it's good or bad? I hate dealing with the high tension side of the coil and plug wires etc because once you start dealing with high voltage it's like magic, things that measure fine with a multimeter might actually be bad and so on.

@ScannerDanner

9 жыл бұрын

John Smith It is a shorted primary that was the concern here, NOT the secondary. And yes, you can measure resistance but it is not always accurate

Hi. I" have a problem with my car missing when its cold, but as soon as it is up to operating temp it is perfectly fine. I checked the resistance of the ignition leads and they are good. Would thee coil do such a thing? By the way, I like your videos. The are great teaching tools

@ScannerDanner

9 жыл бұрын

***** lots of things can cause cold engine only misfires. Two main ones I see, intake manifold gasket problems that leak vacuum only cold and seal up when hot and the second is early stages of headgasket failures

@RobBrumby

9 жыл бұрын

ScannerDanner Thanks pal. went and tested my coil packs anyway and they were fine, so topped the cooling system and fired her up. What do ya know..........Volcano after 20 minutes

it's old Dan, but the problem is now, no spark on a 93 legacy, ecu/m must be 93 specific it is the only one located next to the steering wheel, I have replaced with a used, no spark, put the old one back in, coil, and ignitor replaced with new, no spark, Crank sensor replaced, no spark, put the old one back in, have we slipped a timing belt? all of the pulleys are turning on crank and we have compression? coolant temp sensor sending us a mixed signal? it was a sudden issue, Parked it one evening after work , next morning nothing. The vehicle has always "smelled hot" after driving, like spilled oil on the engine block burning off, and it always regardless of fuel level chirped at start up, where we thought was the power steering, now not sure it was that chirping, maybe it was the timing belt stretching/slipping. I'll allow notifications thanks

@ScannerDanner

7 жыл бұрын

Please post your questions to my forum. scannerdanner.com/forum/post-your-repair-questions-here.html So far you've done some parts swapping, for us to help you, you will need to be able to at least use a voltmeter and test light and be able to follow some suggested testing methods. Hope to see you there!

What happens if the test light does not light up when connected to the positive terminal and controll wires?

@ScannerDanner

Жыл бұрын

Test light to battery ground is the way I taught it here. What are you seeing connected that way?

I have a serious question I have a 99 Legacy with the exact same issue and I replaced the plugs, wires, coil, igniter and ran several wire harness tests for any wire breaks (all good) yet it still has no spark and the OBD2 says the engine computer is working.. why is there no spark?

@ScannerDanner

2 жыл бұрын

do you have injector pulse?

Please where is the ignitor located? Is it integral part of coil or ECU

@ScannerDanner

2 жыл бұрын

Check the description. I've included the original video this class was pulled from. It was up near the firewall

I got a 2002 Impreza. I have power to the coil through the yellow wire. No power to the other wires (control wires?). Cam and crank position sensors are good and I tried replacing the ignition coil.. still won’t start. Any help would be awesome!

@ScannerDanner

4 жыл бұрын

No power on the control wires? With the coil unplugged, take a test light to battery positive and touch on the control wires. They should NOT be lit. Are they?

@TheParkingLotGarage

4 жыл бұрын

ScannerDanner Thank you for the reply and the help! Turns out my motor is seized.. not sure how I managed that when it was turning over just fine. Maybe that’s why I wasn’t getting any spark? Still doesn’t make sense to me how it was seized and I didn’t even notice. In any case, thanks for the detailed videos!

hey master mechanic i got a question, of course if you dont mind answering, why do the transistors turn on when you crank i didn't catch it?

@ScannerDanner

9 жыл бұрын

+armando nika the crank sensor is the RPM and piston position signal that the computer needs to know when to fire the coil.

@armandonika

9 жыл бұрын

+ScannerDanner thanks,yeah it was pretty much stupid question lol

Aside from the possible over-voltage situation,an LED test light might make the flicker more noticeable,because it doesn't have the thermal inertia that an incandescent bulb's filament has. An incandescent bulb won't immediately light,or go out,with the application of a voltage,or when the voltage is removed..it takes a bit (milliseconds?) for the filament in the bulb to cool off,and stop emitting light (or,conversely, to heat up,and start emitting light) An LED doesn't have a filament,so it should react more quickly. (assuming the frequency isn't too high for your eye to see.) I don't know if an LED test light would survive the big voltage spike though. If the designer of the test light is smart,they'd stick a zener diode in parallel with the LED inside,to clamp any potential HV spikes,and protect the LED.

@PhattyMo

9 жыл бұрын

PhattyMo An example of this might be a newer vehicle with LED tail lights. Notice how the blinker doesn't kinda fade in/out,like you're used to? It's just on/off,more abrupt.

@ScannerDanner

9 жыл бұрын

PhattyMo it will NOT survive.

where did you purchase that test light

@perryreasch1499

5 жыл бұрын

looks like a name brand one

Hey Mr. Scanner Danner i just pick up a snap on vantage on ebay and im having problems testing primary current with www.aeswave.com/Current-Probe-Low-range-Generic-brand-p8486.html i see you use one similar to this is it the brand please help

@ScannerDanner

9 жыл бұрын

YUMAD ATME you have to do the math. on a 20 amp setting every 100mv = 1 amp and on the 40 or 60 amp setting every 10mv = 1 amp

@BestMoblieMechanic251

9 жыл бұрын

Thanks for responding but my problem is setting the vantage up to view primary igntion on that particular tool i can view it easy with the u scope just trying to get familiar with the vantage so can u give me a base line on the setting u use when viewing primary ignition