Exploring the ECU hardware and testing - Part 2 (fault finding and troubleshooting)
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- เผยแพร่เมื่อ 15 ต.ค. 2024
- Video Link - Exploring the ECU hardware and testing - Part 1
• Exploring the ECU hard...
Exploring the ECU hardware and testing - part 2
This video explains the ECU circuit board and demonstrates the way of crank and cam signal simulation to run the ECU and perform the different testing.
The engine ECU controls the injection of the fuel to the engine and the timing of the spark to ignite it. It determines the position of the rotation using a Crankshaft Position Sensor so that the injectors and ignition system are activated at precisely the correct time. It uses also number of sensor to read the status of the engine in order to run the engine at optimum performance.
The subject includes ways to check the ECU and follow the various signals and use the signal generator and an oscilloscope to view the signals, this is explaining step by step methods to trace the signals on the ECU board without circuit diagram.
The input to the ECU includes the following sensors:
Crank Position Sensor
Cam Position Sensor
Knock Sensor
Engine Coolant Temperature Sensor
Manifold Absolute Pressure or MAP Sensor
Mass Air Flow or MAF Sensor
Oxygen/O2/Lambda Sensor
Fuel Pressure Sensor
Engine Speed Sensor
Throttle Position Sensor
The output from the ECU includes the following devices:
Injectors
Throttle body control
Ignition coil
Load relay output
Malfunction lamp
Fuel pump
Idle control
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Beautifully explained video, loved to see this is the first video which I have watched without forwarding.
Keep it up
Thanks for your good words my dear friend.
That's great news for me. 👍
well done mate realising how hard it must be for you to do this in English not being you first language I appreciate your time and effort spent sharing your knowledge and I must say you delivered a very clear and understandable video much appreciated great effort thank you
Dear Adrian
Thanks
This is great positive feedback.
Shukran jazeelan hope to see more videos like this and explaining how to fix the ecu and programming and data migration/cloning to new ecu system. god bless you salam......
Afwan brother,
I will try my best. Salam
its my lucky day to catch you on line today im glad to see your videos ,glad to see an arab guy who s explaining in english thank you for the good content
Most welcome Brother, and many thanks for good feedback.
Hi Mr.Saud, I went through your part 1 and part 2 tutorial , Well explained neat and clean i think people with intermediate knowledge on ecm will better understand Thank you ! expecting more videos...
Thanks for positive feedback.
Good job explaining everything.
Well done sir here watching frm Jamaica but my question is is there a site r how can I get hardware pinout for cars ecu
Hi guy you can find pin out in softwares like Mitchell on demand and all data ..
Hi , What an interested video! Care to share your wiring diagram?i want to try it on my ecu. Again thanks and keep creating videos like this. Very much appreciated.
Good demo for learning basic principles of ecm operations.
Can you pl elaborate on the electro mech device you have used?
Thanks
Great job explaining the concept and keeping it simple.
Thank you for posetive feedback.
Very interesting brother! I am willing to learn this thing actually
Yes true this is very interesting technical field with much to learn.
Salam I am very impressed with the electromechanical device you designed. I am a student at automotive school and wonder if you can help me have the circuit design of it.
You are very welcome and thanks for your interest, you can generate the same using 5555 timer chip, all the best
Peace be upon you, my brother Saud. Is there on your channel an explanatory video of the Nissan Patrol 1998 computer? I have a problem with the MFS when Islam is connected, and there is no fire in the circuit, but the car does not start.
I wonder if you could make a video explaining process for ecu to begin, in example, from turning of ignition switch to each process leading to engine running? Apparently it's not as simple as it used to be..)
Hi, that's great idea in fact my self l would learn alot if I could perform such setup, we will need to observe many indications against sensors signals changes that will help also to have better understanding of ECU software and program, in fact if I was having ECU automatic signal simulator like MST9000 for example, that would be possible where we can see all outputs and generate inputs. Anyhow never know maybe in one day
Thanks.
@@saudautomation hi again, well it's been a year later, pretty sure my car was not running yet...it is now. It was about bypassing BMW locking systems. All that's bypassed now. It still would be interesting to see how this computerized system works. Thanks again..)
This is a good video series.
👍Thanks.
Brother Saud .. thanks for the video and information you provided.
Most welcome Brother.
Hi Saud, what a great video! More power to you. Just a quick question where can i get or buy ecu pinout diagram for mitsubishi chariot grandis. Thanks in advance and once again more power to you! Continue creating valueable video
Subhanallahhh!! tamam tareef Allah k liye hein jisne Saud ko itni salahiyat ata farmayi
😊 I don't understand the language but I feel is good words. Thanks
Thank you for a very good video I have been looking for such information big thumbs up 👍
Most welcome, and thanks for you as well.
Thank you! Great videos
excellent video series ya sheikh..
Hello Mr. Saud, your video is very well explained and very knowlegeable. My question is, is there in any way that we can remove the limiter of a certain ecu and what components or parts that needs to be replace. Thank you
Hi, you are very welcome.
If what you mean is speed limiter I believe yes that can be removed not through replacing components but by programming and settings , taking in consideration the safty requrmet and vehicle reliability before taking this action.
Excellent explanation this is the first video I see without forward
But can you explain also programming memory
Thanks, I will try in future.
Something external is frying my ECU and no longer communicating with the ODB2 reader. There are not visible damage. I don’t see any glass fuses on the circuit board. What else could be burnt?
thank you for the uploaded video, good luck always and always healthy
You are very welcome, and thanks for your good feedback
Thank you sir for your wonderful session.
😊 Thanks for watching.
Sir. Which device can read and write this ecu . I mean ktag, pcmtool etc. Because i have two ecu with same hardware but part no. Is different i want to read from one ecu and write to the other.
@Saudi this are very educative video.. where do you get you pinout from,and also o would love to know how you made the simulator for the crank and cam signal.. thanks
Hi, thanks for your positive feedback,
some time you can get pinout by just searching Ecu part number on the web, you can use some applications like Carmin free installation or paid installation like All data,
my simulators is custom designe of mechanical plus electronics signal conditioning circuit.
Saud, my project car is running again now, partly thanks to you...) It's a 2000 BMW, sat dead for seven years. Now I want to bypass several modules I don't want or need...I'd rather cut connections inside the ecu than supply fake "signals" instead of the modules, but it might be the only way since I see the main immobilizer connected IC also appears to have a clock, which seems would be for orchestrating ignitor and injector pulses. I'm getting p0600 and p0601 codes now...which have to do with communication with modules...(?) Any advice? Thanks again...)
Great work I hope you will be able to restore back the car, I know it is complicated as the car was off for several years, p601 may indicate some internal failure with ECU, but in your condition long time car is off verify the 12 volt and ground is OK up to the ECU input, you may need to clean the harness connector and ECU pins especially if ECU is located at engine side.
Anyhow carry on all the best
tHANK you 1 question if the alternator has been undercharging the battery, meaning the car was running without check engine light or battery light and on routine battery maintenance u realize your alternator is only providing 9 v of power and then over a period of months the alternator Dies completely ... can the low voltage affect performance of the ECU
Definitely yes
very informative, how did you managed to provide the ign feedback signal ?
This is fully explained in vedio part 3 (Exploring the ECU hardware and testing - part 3) try to find it is available in my channel.
Yes if ECU is equipped with this feedback input you need to provide, but it is not used in all ECU brands, if that's equvelent to IGF feedback input
thank you so much. Syaikh, what is the role of the SMD capacitor there?
You are very welcome, capacitor take different roles, it work to smoothing the power, also filter noise and voltage spikes, it can copple AC signals to following stage and block DC signal and store the charge.
you're amazing! i noticed my PCM (the exterior at least) is badly corroded. I'm about to try to open it to view the board.. it'll have to be done inside the car bc 2 of the connectors are stuck and I'm unable to remove them)..
if i see corrosion on any components I'm trying to figure out how to find out what they control. my car is in limp mode with U0107 DTC lost communication with TAC module. I've done all the diagnostics and the only thing left that could be the problem is the PCM.
how can i go about finding what each component does in the PCM inside my 05 Acura TSX? I've tried searching online but either wasn't using the right terms to Google or that info just isn't available online without being a member of some type of site for getting this info. do you have any suggestions?
Your a good instructor in Automotive Electronics,i learn a lot and easy to understand,may be you can share where to get wiring diagram,is it in All Data that can be buy in Aliexpress?
Thanks for your positive feedback,
Yes sometime you can just serch for ECU pinout from the web, of course Alldata software is good source for ful wiring schematic , also you can try Carmina std is free application.
Hi sir I have question I hope you would answer it .. when feeding the ECU with power B+ what's the current limitation when setting the power supply When i tracking a short circuit on it!? Should it be 0.4amps or less!?
Hi,
This can vary slightly from ECU to other, but Yes around 0.3 to 0.4 amps is reasonable it can be the average current consumption while the ECU is running without the sensors connected.
@@saudautomation thanks a lot sir God bless you I'm really appreciate your helping,,
Component level repair used to be unaffordable .Now many replacement ecus are unavailable. People are abandoning late model cars. Old fashioned time-consuming repair will make a come back.
My business was megayacht ele tropical sales and repair. Large PCBS were always replaced and restored in the factory.
Thanks for your video! I have no comunication with ecu but vcc on cpu have 5v how can i check or what can i check?
it is better if oscilloscope was pc models like pico for example to be the signal very clear , wish more videos like this . i havent found a video better than this.
Thanks for your positive feedback, Yes that's true if that option is available, but anyhow we can make our best with whatever test equipment we have.
thanks for the effort you put in man, you're so knowledgeable, how did you learn this craft?
Hi, my dear friend and thanks for providing good feedback, I learned by reading and practicing and main aproch never give up.
GREAT AND TRULY VIDEO THANKS...
You are very welcome 👍
can u help me ...there is no voltage on pin -7 k-line of obd2 port for Mitsubishi lancer 2006.. it will be great help if u solve my issue.
Nice demo bro 👍
Thanks 👍
Very nice discription.sir I am from India .pl .tell me where we get diagram or pdf.of certain ECU.pl.give me answer
If you mean ECU pinout then sometimes you can just search for ECU part number at the web,
Or try free software like Carmin std available, Alldata software is paid professional software.
I need help, I want to know what are the ecu cables to start the disassembled 2001 sequoia 2uz engine? I know one is the red wire with black which is the other ??? Thank you
Great demo brother, patiently waiting for more. Thx :-)
Hello sir, my car has ac system equipped with variable displacement compressor, now the clutch is disengaging when the engine is at 1500 rpm and above.. this problem wasn't there before, now my mechanics is telling me that problem is caused by fault ECU..
Then am asking can this be possible where by ecu is making air condition system not to work properly? And can this issue be repaired?
(This problem started after replacing my ac compressor)
Hello,
In general that's possible , some ECU they control the engage of AC compressor clutch looking at engine load or temperature and to help control the power.
Thank you sir,, can i ask how you made your ecu simulator
Hi,
Regarding the ckp, cam semulator, , most of work
is done by mechanical mechanism , the electronic circuit is conditioning the signal for output.
@@saudautomation hi,, my freind thank u for your kind reply,,
Can i ask if its ok if you can send on how you made it or a diagram and the parts
Thankss so much my frend
Great video explanation. I would like to ask you. I have a BMW 525 and it have 4 O2 sensors. The O2 sensor bank 1 sensor 1 no ground at the ECU terminal. What could be wrong? Grounds for other O2 sensors are fine.
Dear sir I seen your tow video very intresting your explanation is very good and simple.. But please you also share. Modulo circuit I hope you my be help time.
Hi,
In fact I don't keep circuit diagrams for ECU board as is no easy to get, this troubleshooting is based on just tracing the pcb copper trucks, But ECU input/output pinout just you can search in the Web.
@@saudautomation Hello Mr. SAUD,
Is there any means to contact you personally on the phone. With whats up or viber.
Pls. Send me your contact number.
With regars.
Great video! You explained much of what I was wondering about. I'm curious what voltage the outputs for injectors and ignition are? 12v or 5v?
Ignitor drive signals from ECU is pulses of 5 volt magnitude.
Injectors uses 12 volt therfore one side of Injector coil is connected to 12 volt and the ECU switching the other side to ground.
@@saudautomation ahhhh, thank you! Interesting...) The mass air sensor read 12v today, not 5v, across all three pins... Coolant temperature sensor was 12v too, not 5v, so I was sure that ECU ground was lost. After checking all grounds, they were all excellent, zero resistance and no voltage drops. Then I found the Ambient intake air sensor and found it was a perfect 5v. This is a bmw E36 that hasn't running 7 years since typhoon Yolanda. It did fire a few times, pop pop pop...turns over well with a bypassed immobilizer coded ecu. Tomorrow I'll pull the injectors and see if they actually inject, lol. From your excellent video and comment now, I'm presuming that not all sensors must use 5v...and 12v is used sometimes. Is that true? Thanks again, it's very interesting. Especially your hand made crankshaft simulating contraption!!!
@@saudautomation BTW, I had reconnected all B+ leads, at the busbar, which was missing. One of those leads provided 12v to a secondary air pump which had been removed long ago (I didn't know) that 12v lead then somehow provided 12v by a short, corrosion maybe, back to the ECU, keeping it live at all times! Months have gone by til this mystery was solved! So now...it's closer to breathing life again..) your video helped me understand how things work. Thank you, again..)
👍👍 Well done and great work to recover back such fault. Thanks for you as well for the good feedback.
@@saudautomation thanks again...) I'll subscribe in case you make other videos..)
Hi, does a damaged ecu affect car's transmission? Specially when there is a feel of delayed in gears ?
Yes
Hi
I have vw golf mk2 1990 ecu the fuel pump not working pls help me
Hi friend ,I need learn to ecu repair.plz help me. where are ecu diagrams .plz tell me side side
Mr, saud where can I can get the pinout Toyota
where to fing that ecu pin diagram which u are showing at 1:20
Dear Saud how r u ? I am Saadany from Egypt.. could u tell me from where did you get the ecu pin out ?
Hi dear friend,
You just need to search using ECU part number for pinout in the web, many schimatics are available but of course not all.
Where can I buy this tool to simulate the crank and cam signals?? I want to buy one
Hi,
The tool presented in the vedio is prototype not yet for sale, but you can serch for automotive Signal simulator in the web for ready made set.
Where do you get pin out schematic?
How to check the IC of AC idle up on my corolla altis 2005 model ,,,
I loved your video, what scope do you recommend for this kind of work?
Hi,
In terms of scope general purposes scope should be ok for testing the ECU circuit, there are some more sosicated scopes with some special functions particularly to analyze CAN signals but for advance use, if ECU programming is required then some programming devices like KTAG can be used,
You may need also some means to simulate the signals plus arrangement of harness connection cables, variable resistors and toggle switches, etc.
Saud Automation you are great and thank you so much for your advice, I am in the market for a scope, again thank you and be safe!
👍👍All the best.
What is the price of new ecm of Alto lxi Euro 3
mr, saud where can I can get the pinout
very nice. Pls tell me, if you dont have that 12v backup, will the ecm produce the 5v the sensors need? i ask because my ecm is damaged and im trying to repair, there is no 5v voltage in the circuit. but all i have connected is a 12v supply to the power input, nothing else to the signal pins
Hello!
I am looking for main power IC can some one tell me its replacement part number? I have this exact same ECU.
Sir thanks for this video. My question is how to get a ECU pin out. Where i can get that information
You can find the information un softwares like Mitchell on demand and all data
what is the mcu brand you testing on this video to look for dataseat pdf file?
MH7202 A01
Sorry, sir, I want to ask you to make a tutorial for the Civic Asia, please? when the main light and when the ac is turned on the rpm drops to 300rpm.plz
Hi,
This can indicate some problem with idle speed control probably.
very nice video sir, im learning from it.. if possible can you make a video of exploring a kia picanto ecu..thank you in advance
Thanks for your positive feedback.
Nice info, if coil 1 and 3 are working, but 2 and 4 are not working, which components are faulty ? PCB code JG331B09702C1, box = MR44641, Mitsubishi Lancer 2000, thanks
I don't have any details for you ECU, but you can trace back from the output pins and check or replace faulty component driving coil 2 and 4 output.
@@saudautomation Could it be Q7 and Q36 ?
@@saudautomation Is it possible that the transistors are faulty ? they are Q7 DTC114EUA Code 25 and Q36 DTC124EUA Code 24, is there any other components between pin 23 on ECU port to the spark plug ? thanks
Saud automation..thank you for the video,very helpful..
You are very welcome.
@@saudautomation sir im looking forward to see more of your videos.. Repairing ECU espescially in heavy equipments...
Hi sir how cheak the car sensor in multimeter
I see that’s a later evo ecu say evo 7-9 maybe? Been working on flashing these. Great video though!
Hai
My diesel car's ECU is damaged in the injector section, it says current above normal or grounded circuit I'm trying to fix it myself which part needs to be checked
Thanks for the help of this video
The injection driver mosfets.
@@laptopDoctorKZN i have removed the mosfet irfr3710z on good check. What's his advice, what else should be checked again
@@laptopDoctorKZN I have replaced the damaged resistor in the injector
Check their should be 2 problem 1st is check with multimeter signal pin of injector if shorted to ground so no doubt mosfet shorted. 2nd if no any reading just check peripheral component like resister. Should be opened. You should check direct to the ECU socket Hope this will help you
Thanx 👍
Awesome video bud
👍Thanks.
Bi, can you please send us link to these software like Mitchell, all data and on demand
Where are you from, i can install alldata for you remotely. thanks
Hello Sir i need
f6a t/c 2wd 4at
33920-74G8 1 ecm pinout diagram plz
Sir, I'm really interested to study this. I like to change to this feild, can u help me with guidance
saudautomation@gmail.com
Can I get your WhatsApp number
Good presentation sir, but how I can get ecu pin out?
Sometime you can just search for ECU part number at the web,
Or try free software like Carmin std available, Alldata software is paid professional software.
what is the voltage value of the AVCC output source to mcu? 5 v?
Yes 5 volt.
Great Job !
Thanks for your positive feedback.
Good, regards from indonesia
Best regards to you from Oman.
Really nice!
Thanks, you're welcome.
how can i get microchip diagram sheets?
My can share how you made you ecu simulator? Crk ,cam,etch simulator
Hi,
Regarding the ckp, cam semulator device, most of work
is done by mechanical mechanism , the electronic part is only conditioning the signa, beside this is still under development.
@@saudautomation hi, thank you my friend,, do you diagram for this, if its ok if you can share to me because i am also a mechanin and it will be a big help and greatly appreciated,, please my friend thanks so much
This is my email joelsarmientoaresgado@gmail.com
@@saudautomation if its ok if you can share me the circuit or how you made the ecu simulator
Sir ,would you please explain a bit about ECU in Antilock Braking System i.e ABS.
Sure I will try my best in the future.
Thanks.
Thanks for your reply sir!
Could u plz help me with these questions too..
Is it possible to make ABS ECU from scratch for a solar vehicle?
what kind of information do I need to gather for manufacturing an ECU for ABS ?
Dear friend,
It is great to use your knowledge to develop hardware and systems thats the best way to learn and gain experience all the time,
If you plan to develop your own ABS system keep in mind ABS is critical safety element in the vehicle and safety of human then equipment is priority. Then you need to study the ABS system principles starting from concept of the wheels speed sensors( types and operation) to the ABS control module (hardware and application software), plus the design of hydraulic system and valves control. Also ABS control module needs to communicate to other control modules in the vehicle to exchange information through CAN network.
All the best
@@saudautomation Yes Sir ,I am not alone to handle this we are a team from VCET .
We have already decided to use hall sensors and the HCU research is also going good .
You may find us on youtube as VCET SOLECTHON
th-cam.com/channels/rFFK_yseTegwXFXc2AHaaw.html
But we are a bit confused regarding ECU as there are many ECU available in market .We are planning to manifacture ECU but don't have an idea how to do so.
If you have an idea as what are the components in ECU for ABS please do right back!!
Thank you very much😍😍😍😍😍
Most welcome 👍
How to make basic bench tester sir can you help me.. from Philippines
Hi,
You can start by some basic pulse genarate and LED indications , I am sure you will be able to make it.
intresting and helpful video.....can I get some information about ECU
Most welcome, thanks for feedback.
please do a tcm repair or fault finding video. thanks.
Hi, yes I will try to do whenever I go the opportunity.
How to check ecm main procrssor good and short check video
Toyoyta ecm processer check signal video
thanks for your vdo
Welcome.
GRATE VIDEO
Hello sir, how the ecu work without immobiliser?
Hello, you are very welcome,
Good question thanks , and the answer for this going to be long,
in fact at very beginning when I thought to semulate the signal to run the ECU same question came to my mind, would it genarate output without doing immobilizer off the engine wouldn't run without proper emo transponder code , but I decided to jus go ahead and try if not then later I will deal with deactivate the immobilizer, but surprisingly the ECU just responded directly, to explain this in this situation in fact the ECU is not fully functioning the RPM also is at very low speed the ECU program try to adjust the respond and immobilizer at this stage not being verified yet.
I think it's because he bypassed a whole lot of things as he's just demonstrating how the ecu operate it's not rocket science to observe this ....idk ijs
Peace be upon you, my brother Saud. Is there on your channel an explanatory video of the Nissan Patrol 1998 computer? I have a problem with the MFS when Islam is connected, and there is no fire in the circuit, but the car does not start.
Peace be upon you, my brother Saud. Is there on your channel an explanatory video of the Nissan Patrol 1998 computer? I have a problem with the MFS when Islam is connected, and there is no fire in the circuit, but the car does not start.
AssalaamuAlaikum Saud. Fantastic video, thx for sharing. Please can you sell us circuit diagrams and common ECU spares? Shukran :-)
+Fazel Suleman
Alaykum Alaslam Fazel , thanks for watching.
Infact I don't have much of circuit diagrams for ECU, normally it is not easy to get one ,the original manufactures they don't will to share at all. That's way most of the time you need to just trace the PCB and use your own troubleshooting skills for fault fiding.
@@saudautomation Shukran Saud... I do understand. I'm busy with a polo ECU ME7.5.5. Customer took car for a test drive, while negotiating the car was idling and just cut out. Now it only cranks, immo light goes off so it's not a security issue. Only thing I notice is that the EPC light does not come on with ignition. No spark or fuel but NOT coding problem. Any idea which IC, or do u have co.plete pinouts?
+Cluster Master
This malfunction can be caused bay many reasons but as a simple guide Just check the coming few steps:
Check at least the ECU is getting on, turn the IGN key to ON position and the check engine light should show up for some time. But this not applicable to all vehicles anyway.
However, at this stage you need to hear the fuel pump running for few seconds and then goes off this will indicted the ECU doing the basic functions.
If not happening, you need to make sure in way or other the ECU is powering up and running
If you suspect for example the fuel pump not triggered by ECU and you are sure the electrical loop of the fuel pump is OK then search for the ECU pinout using part number. Identify the pin number for fuel pump control and then trace the PCB track back from the pin to the driver component it can be transistor or IC and then check or replace.
All the best
assalamu aleikum! Shukron jazilan laka! Min ayi albilaad anta? Barokallahu fik!
Aleikum asalam,
Shukran laka wa hayaka Allah,
Ana min Oman. 👍👍
thankyou very helpful
Welcome 👍
@@saudautomation how would you go about doing live data on obd
Yes with OBD scanner getting live data is very handy while the ECU is online connected to the engine and sensors, but your idea is good to explore this option while the ECU on bench. Thanks
@@saudautomation yes it works your video inspired me to try, i did not realise how easy it was got live data on bench , you can read can high , can low and kline . im just waiting for a wave generator to do crank and cam thankyou
Well done, and all the best for you .
Plese open sub title english Exploring the ECU hardware and testing - Part 1 (Hardware circuit demonstration)
Thank you.
Thanks for feedback.
Where I get the datasheet of mcu
For example you can get from following sites.
Alldatasheet and Alldatasheetcatalog
Good job Sar
👍 Most welcome.
@@saudautomationdear sir so many thanks for tie video... Please give the circuit diagram of the using modules for the testing of e c I.
In fact I don't keep circuit diagrams for ECU board as is no easy to get, this troubleshooting is based on just tracing the pcb copper trucks, But ECU input/output pinout just you can search in the Web.
@@saudautomation Dear sir those too(modul)you use those you make on zero p c b on that one motor mount and some semi.. conducter. Fited which control bythr veriableresister. Ic etc that circuit I require and which type motor you use. Thank you I am from India.
@@saudautomation in what specefic website sir..
Thanks
Welcome.