💬 How ECUs Work - Technically Speaking

[@ultimateracingtips2799]

What's interesting is how the driver fits into the equation. Just because fuel injection and ECUs are better doesn't mean they will always win a race. Chassis tuning, driver ability and weather all play a role in the over all tuning picture as well as individual knowledge of conditions and the race track itself. It's fascinating to see how one single part of a race car can become an entire industry where companies like Haltech spend millions of dollars to push the envelop and further what's possible. Pretty cool. Great video that is easy to understand without being watered down.

[@JakeTheBear1]

Wow after so many questions about ECU it's the first time I actually heard about the basics.

[@JesseltonGaming]

Lol me tooooo

[@34SDN]

Very informative, cheers mate !

[@meusana3681]

You guys really hit the market with the ease of install and functionality of your ECU's. I have never wanted to tinker with engine management in all my life due to being afraid, now I can't wait to save up enough for an Elite 750 for my '92 vg30.

[@meusana3681]

Tons of thank you's, have them :)

[@wonniewarrior]

I remember replacing my battary once. When I restarted the car, the dashboard flashed 'BASE'. It turned out the ECU and car other computers was reset to base figuires, and the instructions required about 200 km for the ECU to relearn the engine operating figuires for my style of driving and habit.

[@marcallen1957]

i know Im asking the wrong place but does any of you know a trick to log back into an Instagram account..? I stupidly forgot the account password. I love any help you can offer me

[@marcallen1957]

@Jalen Conor thanks for your reply. I got to the site on google and I'm trying it out atm. Takes a while so I will get back to you later when my account password hopefully is recovered.

[@marcallen1957]

@Jalen Conor It did the trick and I finally got access to my account again. I'm so happy! Thank you so much you really help me out :D

[@jalenconor5631]

@Marc Allen you are welcome =)

[@bobbylong4443]

Outstanding. You know I was just watching with volume down because my daughter is trying to sleep but what I saw with you drawing was fantastic it would be cool to have you drawing everything I just seen in video lol I learned so much

[@sardengineering]

This isn’t a new release but the information shared together with its delivery was spot on, why would you not want an electronic engine management system! It’s great when manufacturers take the time to relate to the wide consumer market. This shows a wealth of commitment matched only by a passion to achieve the best possible end user experience. Thanks again Scott and thank you kindly to Haltech for their dedication!

[@martinbyrne715]

Glad someone does videos,that don't assume you already know the basics.

[@dominikszczerepa5544]

7 years later, still a great video

[@globalcomsur]

Very educational I''ve unstood everything you were talking about .,Thank you so much sir

[@13thvarebel16]

Scott, thanks for the video...it really condensed the concept of how an ECU vs. a carb works. My only question is: if I'm not obsessed with performance (and not an electrical engineer), and I just want to keep my bike running steadily and reliably, where is a good place to start learning how to interpret engine trouble codes and how to diagnose electrical problems instead of having to go to the dealer every time I get a bad code? Having said that, am I better off sticking with my carbs and throttle cables :D ? Thanks and cheers!!

[@rajeshkumarsingh3801]

Dear Scott Basics of ECU very well informed & executed,keep it up👍👍

[@lukestuart1]

Thanks Scott. What was a really informative video

[@StupidRalph]

Breakfast sandwich go look in the freezer Hannah stocking

[@balls5428]

@@StupidRalph no, the constituton of 1856 was better.

[@StupidRalph]

@@balls5428 What the heck is this? My comment makes no sense. LoL Must've been my daughter trying to voice search.

[@3point8]

Great explanation and breakdown, Scott. Still a lot of confusion out there about how ECUs and tunes do.

[@blue04mx53]

yep, I think what I'm learning is that any tuning I tried to do would end up with the engine running worse or not at all. I think, ( but I'm not sure) that you MUST do the tuning with the car on a dyno. So, either buy a dyno(kidding) or get access to one. But, then of course it'll be the techs and not you that does the tuning I expect.

[@htetpyaekyaw-hendrik]

Thank Sir !!! I have presentation to do tomorrow and this really helped me a lot !!

[@jessepinkman7020]

It really helped me to understand the ecu system thank you 🙏

[@moroccokhattak2890]

Great explanation I was crazy about how ecu works, then this give me the idea. Thanks guys

[@braidensymonds737]

I'm an auto electrician by trade and would like to learn more about fault-finding and repairing ECUs and modules in general. Can you please advise on an university or trade related courses to learn the in-depth information on how ECUs are constructed how to test their components and what components they consist of. I have A fair understanding from my own research and fault finding throughout my career but am wanting to take it to the next level. Please keep the content coming

[@nelsonmagtanong3863]

Nice video very imformative meaning to say we need to do some adjustments on our ECU if we are considering of changing our exhaust system thanks for sharinh the knowledge.

[@saadnouri3738]

OMG !!! how much detailed science and technology humanity have reached !!! i can safely say : i know nothing ...... nothing at all !!!!

[@josephmachila2925]

Am surprised too with this intelligence

[@captainace1056]

thanks dude! I'm definitely gonna be a automotive mechanic and tuner!

[@Guardrailkid]

Keep your hopes up!

[@pjwoo276]

Please forgive my ignorant question, but @ 4:58 and there abouts, you draw red wires going INTO the 'out' side of the ECU. I would have expected that the 'out' side would show wires pointing OUTward, figuring that the signals have been corrected, and the 'revised' signalling is then being sent OUT (to the various sensors I guess) to make the necessary adjustments for efficiency. If that's not how it works, well then I guess I sure missed something. I really enjoyed your presentation.

[@nicholasduma5404]

Well, explained.

[@martinlaulunen7189]

Excellent presentation..Thx

[@johneric3886]

Nice work, good job, terrific communication skills. Plus you covered a lot of stuff.

[@threemglobal]

Very good info

[@nehalbechan685]

This helped me so much

[@jaybiekurishima5935]

Thank you. I understand the visual of ECU car programming.

[@AKDMB]

Explain an Injector/Ignition Driver circuit!

[@kristopherhasenbuhler5393]

Yes please do. I would like to know how i can keep my injectors open longer

[@SmartStudioBE]

i liked the vtec yo! :D anyway very great video !

[@imsawiranegara]

Hello haltech. Currently I am imagining to convert my old 2 stroke engine (Yamaha V80) using the TBI system.I'm curious about this, can the TPS sensor cable be split into two? One to the injector and the other to the oil pump (like the KTM electric oil pump). If you know the answer, I would be very grateful

[@DailyDotaTV]

I really would like to learn this stuff. How to tune cars and how to operate the ecu. Any ideas where to start?

[@haltech]

A good place to start are online courses like EFI 101 or HP Academy. Once you've got a basic understanding of EFI and tuning, we run regular training seminars teaching you how to tune with Haltech.

[@s.j.5850]

Don't forget the Crankshaft Position Sensor (& Camshaft Position Sensor as cars so equipped).

[@davidessien5465]

Very nice video

[@mikesmechanical1102]

Could someone pls enlighten me as to why someone would dislike this video?

[@CorndogBrownie]

The curve at 4:20 . It looks quite similar to a gt86

[@GodofKings-Raj]

Explain how ECU functions related to automatic transmission vehicles... Specially hyundai i20

[@karanraghuvanshi5998]

Hey ! My question is a bit out of way but I'm pursuing mechanical engineering and I want to work in automobile industry. Can you help me out giving some tips on that ? It would be a kind gesture of yours. Thank you

[@haltech]

Hi Karan, All we can suggest is that you be active in the auto community in your area. Get to as many events as you can, and meet as many people as you can. :)

[@danielfiore5899]

Great vid Informative

[@GeographicalWatermelon]

Does the stock ecu adopt to an after market air filter??

[@alabhaya9]

Excellent video

[@reneomarbenitez3645]

Thanks for the great info

[@garyfleming9960]

Great vid guys!:)

[@haltech]

Glad you enjoyed it!

[@ammarrashid3535]

Does the ecu control the AFR, so a tuner can only input a certain AFR while tuning, instead of fine tuning fuel injector timing for a certain manifold pressure and throttle position? For example you just input an AFR of 14.7 at rpm below 3k, and a little rich mixture for higher RPM range, just an example. Thank you so much in advance!

[@kumar0046]

It's nice explanation

[@wisdom_wellness365]

Very nice! I like it!

[@grillfluencer]

Man, I love this video but it needs dark mode.

[@hubaszarvas2106]

this is particularly the motor ECU not the ECUs inside the whole car

[@umarmalik8885]

You are doing a great job. Your way of telling is great. I don't understand English at all, but what you are saying I understand a little too much. I am very fond of learning ecm. can you help me...??? How can i learn it ... My native language is Urdu. I'm talking to a source of translate

[@swathiv134]

can you explain more about load and torque look up tables?how this can be calibrated

[@IsmailKhan-kx8up]

Please contact me on [phone]

[@IsmailKhan-kx8up]

I think you are from AP or TS

[@davidessien5465]

I have a customer range rover car that crank but wouldn't start. There is no spark, injector pulse and very important no control feed current to the ECU when the ignition key is switched on? What causes no feed current with key ON?

[@marcorubio3496]

Great info thanks

[@matthewreguyal4907]

Hello mate great video.. Just a couple of question mate.. Its a great idea if i connect the aftearket tacho to the ECU?and where do i connect in OUTput or input of the ECU..and how can i locate which one of the 2 pin connection is OUT Or IN..i saw on your drawing the right side is in and left side is OUtput..pls help..i want to add tach on my ecosport.pls advice ..thanks

[@aaronmcdaniel5893]

What about mass air flow can that work in place of manifold air pressure or would that have to be converted to run a haltech

[@lexsoft3969]

MAF comes before the throttle body, whereas MAP sensor is after the throttle body coming into the intake manifold. So their functions are different.

[@cjlarson7642]

Does ECU / ECM control the alternator too ?

[@the_real_superstickman]

I'm a fan of the whiteboard illustrations

[@lexsoft3969]

I agree, written explanation with diagram is quite often better than a mere verbal explanation.

[@ashishtanwar375]

quiet helpful !!

[@mrfixit-wb5qb]

The situatiom im having with my 03 3.5 nissan altima is..i was told if the timing chain is out of time which i guess mine was 64 degrees out of time amd thats why im not getting spark and fuel injection...could this be a factor? This cars ignition is controlled by the ecm..whats ur opinion..i personally figured if the cam and crank is out of time and the cam and crank are both turning u should still get spark right?

[@Russellmonroe314]

Thanks guys.

[@murphdogfilms89]

Super clear thank you!

[@mechboys6131]

Sir can i attrach difference car speedometer in my car or any effect or problem in ECM

[@MethmalDhananjaya]

This helped to my TRDLZR

[@codediy200]

That's really informative and I want to know one thing,is that possible to made some extra connections on that?.I want to know the full thing about it.

[@Tengman24]

Is it possible for the ECU to control a exhaust cutout butterfly valve? Haven't seen that application on cars just, sports bikes

[@haltech]

Yes, this is possible with our Platinum and Elite series ECU’s via a simple RPM on/off switch output.

[@Tengman24]

Sweet 😁😁😁

[@funkynerd_com]

Good video. Although, you don't "need" IAT to run an engine, but I'm nit-picking. In the end, the more sensors the better, really.

[@chasecooney5185]

That was very helpful thank you

[@emmanueljoseph506]

❤ thanks for the inspiring video.God bless

[@Sipu4Life]

WOW,Great, explanation.

[@crazyharis]

Hi can you help me , how do i know if the ecu ore modules are good or not ... Because i made a short on the CANBUS wires 🤦😩 car cranks but dont start sometimes starts fore 1 second... And it has no communications with the OBD . PLEASE HELP 🤕

[@ingenia-tec5194]

Thanks a lot :D Now I know what a need to do :3 Thanks :D

[@sanzsana5958]

How does ECU help Electronic Transmission shifters like the Prius gears? How does those Type of gears work?

[@cleggpaul]

I am changing the steering wheel on a Fiat Panda 1.1 from another Fiat ( 1.2 ) how can I get the ECU to recognise the new components? Thanks

[@glenn9k]

Isn't a cam sensor or something equivalent required? So that the ECU can know which stroke each cylinder is in?

[@haltech]

Yes, we’ve simplified things greatly in this video and an engine position sensor is what we refer to as the ‘RPM’ input in this video.

[@glenn9k]

Ah, I see. Are your ECUs capable of controlling an engine without a position sensor? I work a lot with Saab's, and their Trionic ECU determines the engine position by measuring an ionization current in the combustion chamber/spark plug gap. If I were to install a haltech ECU on such an engine, would I have to change the coils and install a position sensor, or could I use the advanced Saab Digital Ignition cassette/coil pack?

[@haltech]

All Haltech ECU’s require some form of engine position input to determine correct injector and ignition timing. The proprietary Saab system would most definitely not be supported.

[@glenn9k]

Allright! Will have to think of a solution to that, then. Thanks guys!

[@abinav1118]

the bgm was dope!

[@romancarp6427]

if i put some bolt ons on my car and i want to tune the engine to maximise the gains from these parts do i need to invest in an aftermarket ecu or can you still do something on the stock one?

[@romancarp6427]

thanks for the video

[@incolink]

way to general...with your question if I am correct to assume r34 gtr you can tune and optimize modest bolt ons with an ecu hack like nistune or a piggyback like power fc ...if you want to go a bit more hardcore like doubling the power output a haltech plug in is worth consudering this will give you a few good upgrade functions like luanch control flex fuel.rain mode now control anti lag...

[@Moriquendiii]

That depends entirely on what car you have, but you are going to need a chip or modify the original ECU at the least. If it is a nissan you should check out Nistune, and you can probably find something similar for other car makes. If you want full control of your ECU you should get a proper standalone tho, thats why i bought my Elite 1500.

[@cameronjansz88]

Adam Naylor nistune actually has flex fuel as well

[@The_JDM_Dynasty]

@Adam Apexi Power FC isn't a piggyback.. It's full standalone albeit a bit outdated nowadays. I've just bought one for my FD. Haltech is definitely the way forward though, will be investing in one for my GT-R at some stage.

[@hirsijama5705]

very helpful thanks

[@Stuntlight97]

Don't you also need a crank angle sensor input or trigger wheel to know where the pistons are?

[@haltech]

Yes, we’ve simplified things greatly in this video and an engine position sensor is what we refer to as the ‘RPM’ input in this video.

[@jasonelliot9633]

Yeah I got a car computer that is not pulsating the injectors and I have no communication from the computer with a scan tool is that maybe one of the inputs??

[@jonivan1014]

Great job! Thanks!

[@thijs1538]

So does this mean the ECU is the same as what we Dutch call a boardcomputer? The thing that handles all the canbus imputs and enige error codes or dashboard light etc?

[@haltech]

No, not really. The boardcomputer just displays information. The ECU actually controls the engine.

[@dineshfonseka6943]

Cam shaft and cranck is control by ECU? and how?

[@lilvenombeatsproducer5632]

Help I just bought this which had its ecu swapped with a new engine the imoblizer is disabling communications with the ecu whats an alternative way off communicating with the ecu

[@ishapise88]

what are the ECU components ,input and output for an ABS?

[@Fuellable]

Hey, is it possible to manage a 2 stroke fuel injected single cylinder engine with a halltech ECU?

[@meusana3681]

Ofc it should be, if you are talking about transfer port injection that is.

[@haltech]

The short answer, is yes :)

[@joshuamelpa4874]

Hey man I have a question and I need your help. Is it ok to replace a automatic transmission cars ECU to a manuel transmission car?? Is it gonna work?

[@abbeyomisol]

Hi, thank you for this video. It is very informative. However, one question though. Is the ECU mainly focuses on the FI process and is it standard for all bikes? I am planning to customize the dashboard of my motorcycle (Yamaha NVX 155). I wish to create a custom-made display screen, which I will replace the existing digital dashboard display. I wish to make the new display screen more intelligent and has many more added function such as GPS-direction app. Is doing this does not require alteration or change in the ECU? My goal is to make my dashboard (digital display) a bit smart and does not only dispaly, RPM, Speed, Time, Trip and Odometer as what the original display does. Can you please shed me light on this, I don't wanna mess with the ECU, is it possible to make this project with the said restriction?

[@mohiehamilton7560]

Should I have a fault in my vehicle does these tables outline them to me on live screen???

[@aliakas1402]

ecu monitor sensor signal ,when sensor stop working ecu show a fault code read by scanner, solenoids like fuel injector or oil control valve dont send signals to ecu so how ecu know solenoid stop working to show fault codes related to solenois?

[@VishCricket2.0]

Could you please make a video of how sensor data value is calibrated in an ECU?

[@haltech]

We are actually editing one with that content in it right now.

[@californiadreamin8423]

@@haltech I’m interested in the mechanisms by which an ecu can be “fried” by a circuit fault……yes, my ecu’s keep being fried . Faulty/incorrect relay which sends 400 volt back emf say , back into the ecu, or a faulty earth which damages the ecu or ….or…. My 2.0 hdi Peugeot has become a “project”, and I’m using a brilliant pre…ecu French diesel….but it won’t last forever. Some links / advice for study will be much appreciated.

[@Tornado2619]

V Tec kicks in yo

[@incolink]

if I have a pressure ratio tuned elite set up and I remove my muffler the elite will make fueling change based on the pressure ratio change ....ok that's the basics please please do a pressure ratio video it's a great development that needs to be descussed.

[@SI0AX]

Isn't that related to forced induction?

[@incolink]

+SI0AX it relates to.every engine but is far more significant to a for forced ones...

[@SI0AX]

So it's just another tuning method? Like boost tuning and load tuning?

[@incolink]

it becomes the main load axis it creates a number from inlet manifold pressure and exhaust manifold pressure ( i think) it looks to express the pressure differential across the head of the engine and that helps determine the mass of air that the engine is using .. and therefore the fuel it requires.

[@SI0AX]

That's interesting. There should be a general video about all the different tuning types and a basic explanation of how they work.

[@TheGuy030770]

If my cooling fan is not running at all, with or without the A/C on, is there a chance it could be the ECU? I replaced the cooling fan, and it refuses to run at all.

[@haltech]

We'd recommend checking your wiring first.

[@take-ecufix]

Hello. What about ECU inner side? can you explain it?

[@scratchyourhead2383]

How does the tuner relates all these stuffs ?

[@carltoncarlton8648]

Thanks very informative....

[@johnmatthewdeguzman1881]

Hi. I remove my catalytic converter to modify my muffler. My question is, does modifying a muffler requires ecu remapping? Any thoughts about this and what are the effects after? By the way im a motorcycle rider. Thank you :)

[@hks071]

so useful!!

[@k.kathiresan4170]

Sir could u explain tha main electronic components and their working of ECU

[@nasserprof914]

well done . thank you

[@toveryonder1115]

great vid scott! What would it take to have a real time power display?