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Car ECU/ PCM computer testing

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Here is procedure for Nissan Sunny/ Sentra 2004 ECU or PCM testing using oscilloscope. You can test and verify it using a DMM. By testing, you know better what is fault with ECU or PCM and how to repair one.
Категория: Люди и блоги
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Текстовые комментарии (154)
Senyapp (16 дней назад)
ecu--component scanner https://www.youtube.com/watch?v=BKSj1og0ngQ
Akther Shorder (19 дней назад)
Thanks
usman mehar (5 месяцев назад)
how mach   procedure  ecu  or pcm testing     Pakistan  RS
LearningZone (5 месяцев назад)
It needs big range of equipment to repair ECU. It needs something 10 lak rupees to invest in tools and equipment for such job.
Ejaz Khan (7 месяцев назад)
sir thank you so much for uploading videos
Ejaz Khan (7 месяцев назад)
sir wonderful me tire thank you
Shark22 2 (7 месяцев назад)
Good explanation of ECU hardware and testing at this channel (Saud Automation).
Imran Nazeer (7 месяцев назад)
Bahi aap pakistan say ho aap urdu me samjao ta kay hame be kuch samajh aye aap enghlish me samja rahe ho angreez ko sub pata hy
TheWertyu2007 (9 месяцев назад)
great vid , trying to learn about electronics more to improve skills , and ill watch all your videos to learn today . thanks very much .
LearningZone (9 месяцев назад)
Thank you very my dear friend. I am watching your videos too. They are great.
Jose Ferreira (10 месяцев назад)
is that water on the board?
LearningZone (9 месяцев назад)
No dear friend. This is flux and some plastic risen for protection.
Jose Ferreira (10 месяцев назад)
LearningZone or is it flux? I am not criticizing
LearningZone (10 месяцев назад)
+Jose Ferreira possible, if you are happy with that!
SIMON NYAMUTEKENYA (11 месяцев назад)
Thanks people for such information. Anyone to help me with information I'm repairing an ecu for Isuzu diesel bukkie 2.5l dteq 2014 model. I want to see a component that was burnt beyond recognision. I want a clear picture of the inside of the ecu
Richard rockwall (11 месяцев назад)
thank you very much for your time
LearningZone (11 месяцев назад)
You most welcome dear friend.
Richard rockwall (11 месяцев назад)
here in the states you cant find inside diagrams of control units. is there somewhere you recommend
LearningZone (11 месяцев назад)
Yes dear friend the internal diagram is not available anywhere. This is their secrete. But one can repair it by experience and understanding.
yosi moran (11 месяцев назад)
where it would be possible to availa comprehensive book regarding ecu testing and repair
LearningZone (11 месяцев назад)
If I may write one!
Airman (11 месяцев назад)
Hello Could you make a video explaining how an ecm/ecu exactly works? Starting from mcu, ic, transistors etc Thx
LearningZone (11 месяцев назад)
Dear friend if I may get some business in this field, I will sure shoot videos to satisfy your needs. Stay tuned.
Richard rockwall (1 год назад)
Where do you get the pin out charts for ecu?
LearningZone (11 месяцев назад)
A vehicle schematic diagram may help you.
Ashok Singh (1 год назад)
hello sir please tell me that if i change my car ECM unit than it is must to change the car lock set also
Ashok Singh (1 год назад)
ok sir thankyou
LearningZone (1 год назад)
+Ashok Singh it is needed to marry the new or replacement ECU to the car. Sometimes it need reprogramming or ECU refreshing and some tomes sure key and lock cylinder replacement. This depends on your auto lock smith abilities and facilities. Good lock smith can reprogram it for you. Soon I may add an article to my blogspot on this subject. Stay tuned.
Ashok Singh (1 год назад)
sir please tell me, In this case Is there any possibility of problem in ECM unit.
Ashok Singh (1 год назад)
hello sir now in my car fuel pump and injectors both the things are not working. please tell me how to solve this, mechanic is unable to solve this problem.
Ashok Singh (1 год назад)
ok sir thank you very much. I appreciate ur work u r providing very useful information to us. thnx
LearningZone (1 год назад)
It could be a defective ECU or could be problem somewhere outside the ECU. It needs proper investigation. Anyhow the external keyed power to the fuel pump should solve your problem. Regards,
Ashok Singh (1 год назад)
Sir i m saying that in this case the fuel pump is not working then it is due to some problem in ECM unit or there should be some other problem. I mean that there is possibility that the ECM is defective
LearningZone (1 год назад)
You mean if you make any arrangement for fuel pump to run then it could cause any problem to ECU? Then the answer is there will be no problem to ECU at all if one may do it carefully and may not touch the ECU wiring in such modification. Such modification would a perfect solution in your case. If anything else, you most welcome to question. Regards,
Ashok Singh (1 год назад)
hello sir. please help me. I am having Maruti Ritz car and there is a problem that the fuel pump is not working and also a ligh of heater is not blinks. Mechanic said that there is a problem in ur ECM because it is not providing current to Fuel pump. can u pleaee tell me what is exact problem and if there is problem in ECM then how to repairs. please help me sir
LearningZone (1 год назад)
So then it should be easy. If the injectors are working and the car is start with external power to fuel pump, it is an easy task to make a keyed power to the pump then. It will save your big money compared to ECU repair or replacement. Regards,
Ashok Singh (1 год назад)
thanx sir. I want to provide some more information that my car is having a diesel engine. Mechanic check fuel pump directly by giving power to it then it works and starts to eject fuel but car is not able to start because injectors are also not working at that time. But now mechanic is saying that injectors are now working there is a problem in the wiring which is now fixed but fuel pump is not working right now.
LearningZone (1 год назад)
Dear friend this needs further investigation. Sometimes there is no problem with the ECU but some problem external to ECU like in wiring, relay or some control module which drives your fuel pump. All is needed to carefully check all the system before attempting to replace the ECU as it is an expensive part. Also if it is petrol car, ask your mechanic to put petrol from the outside or provide propane to the engine and let it start. If it starts and runs on external fuel source, they should make some arrangement for fuel pump external to ECU. In this way you will be saved from an expensive replacement or repair. Or on the other hand if car doesn't start and runs on external fuel and everything is ok outside the ECU, you will need to repair the unit or to replace it with another good ECU. Sometimes it could be due to immobilizer security problem if it is immobilizer equipped car. There are a few more videos on immobilizer and security on my channel. You may watch them and get some idea. Let me know when you may do the above with your car. Wish you good luck with your car repair.
nadeem akhtar (1 год назад)
Salaam sir kya hal hai please apna contact no de saudia ka tu hai liken aap pakistan chly gy hai jahazeeb bhi pakistan ka mobile no moje send kar de
michael fawcett (1 год назад)
me no understand ,,, me human
LearningZone (1 год назад)
No worries. Be a good human then you may be understand.
bhoyet splading (1 год назад)
its ok idea.. if the 5volt ref is low voltages or short to batt.what is maybe the cause,?
Omar abdel (1 год назад)
thank u for sharing ..
LearningZone (1 год назад)
Thank you very much dear friend for liking. Stay tuned for future videos. Regards,
Nitin Vaishnav (1 год назад)
very well explained sir....nice to see someone using oscilloscope for testing...😊
LearningZone (1 год назад)
Thanks dear subscriber. I am frequently using scope for testing.
Sheila Velez (1 год назад)
do you own your own company?
LearningZone (1 год назад)
Not yet dear friend but am looking forward to have one in future.
Airman (1 год назад)
Excellent video thx for sharing
LearningZone (1 год назад)
Thank you very much dear friend for liking. Must subscribe the channel so that you may get more and more electronics videos.
M. Abid (1 год назад)
sir i had a ford explorer 2008 problem is rough idle at stop. i check the voltage at the electronic throttle body input two wire connector it 3.7 v at both wires will it fine ? or should be 5 volts and the seccond thing is the voltage should present both wires? kindly give ur suggestion thank u
LearningZone (1 год назад)
Thanks for subscribing on my channel. Subscribe if not yet subscribed! Voltage may be fine but the throttle bodies are accumulating dust and debris. You should clean that for nice performance and good idle. You should watch a few of my throttle body cleaning videos on my channel to understand the subject. Also there is one or two videos focusing on drive by wire throttle body cleaning. You will know how to clean them and set up the idle to a nice value. Please don't hesitate to ask anything anytime. Regards,
Abdou Dfi (1 год назад)
Thank u
Abdou Dfi (1 год назад)
I have participated in the channel, and thank you very much and I hope that we have learned more about ways examination.Ecu 😊😊😊
LearningZone (1 год назад)
You most welcome dear friend. You may subscribe to have automatic notification on each upload.
vamsi karanam (1 год назад)
hii sir, this is krishna and i completed my undergraduation with mechanical and now i am intrested to learn how to repairecar ECM and emoblaizer keys would you help me about that...thanking you
LearningZone (1 год назад)
How can I help you?
Nacho Poppie (1 год назад)
Thank You. Very basic question for you. I live on the East Coast of the USA. I am a beginner electronics repairman looking to make a business out of not just PC/Mac board repair. What tools/info would I need to get into Vehicle "ECM/PCM" repair? How would I test them?
LearningZone (1 год назад)
The key for their repair is your knowledge then second is the ECU emulator. They are expensive but very useful. Also you will need other tools like Oscilloscope, multimeter, soldering iron, hot air station, screw drivers, hex torx and other tools etc. Also you need a database of information.
ASA ASA (1 год назад)
have nissan micra 2012 march petrol i am having problem with my car , central lockig system from the driver side door not working . front wiper is working but rear wiper is not working . headlight working and brake light also working but turn signal not working and trunk door not locking. and all doors not working electric
ASA ASA (1 год назад)
it was a loose connection on the front
LearningZone (1 год назад)
It could be a bad fuse or wiring problem. Seems there will be some +12V supply rail missing to certain section. Check first for blown fuse and then check for wiring. For fuse testing refer my other videos on my channel. Thanks for linking and subscribing.
AKKU SHA (1 год назад)
Hi, I would like learn ECU chip level repairing, where is the best place for it?
LearningZone (1 год назад)
Your own knowledge and experience is the only best resource available. There is no such material available on the internet to get any help from. Regards,
Hammer USN (1 год назад)
well i like the video... thanks for posting. BUT where can i find the spec sheet for , test point voltages , for a particular car??
LearningZone (1 год назад)
Such an information is very rear available on the internet. You can only rely on your own knowledge of repairing and understanding of electronics to do such a job. Regards,
Venture Electronics (1 год назад)
Great video, keep em coming.
nick franks (1 год назад)
tpms module repair
LearningZone (1 год назад)
Stay tuned, I will upload so frequently. Better if you subscribe my channel to be in contact always. Regards,
A.D. Obi (1 год назад)
Sir I want to buying car diagnosis but Which is the best brand I din,t know.u can help me
A.D. Obi (1 год назад)
Sir launch products r not good?like this x431/IV/v.
LearningZone (1 год назад)
Verus Snap on. but very expensive. the other alternative could be a cheaper Chinese one.
Afaq Prince (2 года назад)
sir pcm aur ecm mn kya farq hai..pcm engin k sath hota h. aur ecm under the vehicle?? righg
LearningZone (1 год назад)
Dono aik hi cheez kay do nam hen. koi farq nahi.
Lakoya Ross (2 года назад)
i have a 20MHZ Oscope will that work.
LearningZone (1 год назад)
Sure it may work if you know how to use it properly.
Frank Lopez (2 года назад)
This is so stupid.  Not everyone has this device.
LearningZone (2 года назад)
What do you think if somebody have no basic test equipment available then someone is showing a good and reliable testing technique, is doing stupidity? If you are thinking in the same way then you are an enemy of knowledge. You need a to broader your mind and try to get some basic test equipment if you are interested to do such kind of work. Otherwise there is no need to put your leg in such critical work. Regards,
michel lamarche (2 года назад)
allo i was wondering what voltage i am suppose to read on the last pin that you check because i got the same ecu from a 2005 sentra and giving me allot of trouble thank you your video is really helpful .
LearningZone (1 год назад)
That is great if it helped you. Regards,
Eero Laukkanen (2 года назад)
Good Job, you are genius !!! Don't worry some stupid loser's comment,....they are jealous of your knowledge, only freaking thing they can do, is a bad hangover =)) So, I am having a problem with my ECM/ infiniti FX45/2004, AC works sometimes, sometimes not, freon level is OK, and compressor works??, and engine smokes a lot, could have issue also with piston rings..., and valve stem gasgest,...BUT, could faulty ECM also change valve timing, and be a reason for extra smoke in engine??? I only have 120000 miles, power is not great, but is OK, and there is no noise in engine?? Drinks oil like crazy, 1/2 a quart/ day???? How could I test my ECM, before I buy a new one, they are so, so expensive =((( If I send it to you, how much you charge to test/ fix it??? Be reasonable, buddy;o) Well done, youtheman =)
gamuchirai tsokodayi (2 года назад)
this is good stuff. thank u. i have a nissan micra k12 with no spark no fuel injection and no codes when scanned. the ecm looks quite similar to that one you are showing. please tell me which one is the IC for fuel injection and spark on mine.
Saud Ashraf (2 года назад)
thanku soo much sir for helping me out i appreciate and inshahAllah i hope to get good result. thank you again
dornye easton (2 года назад)
Nice one, that is the quickest way to get rid of dry joints. 5********
Airman (2 года назад)
good job, where can i get the PCB diagram? or is it just a pure technical expertise
LearningZone (2 года назад)
PCB or schematics diagrams are not available. This is companies secrete. This is a matter of testing and sure experience and skill. Regards,
Saud Ashraf (2 года назад)
Asalamualikum Sir i have 1 more prob if can help me out. i really appriciate all your answers. Problem is that when my pathfinder 2003 is on last quarter of petrol it automatically turn off engine then i have to start it again .and it happen around 3 to 4 times untill i refill the petrol.i m not sure if its fuel pump prob. I m really scared that maybe it ll give me a new prob please help me out
LearningZone (2 года назад)
Dear friend thanks for appreciation. It seems like a fuel pump or maybe a fuel filter also if you didn't replace it ever. So better first replace fuel filter and then fuel pump if needed. Although it could be proved by testing also. I have video doing such testing on my Toyota Corolla. Regards,
Babayanju Adetunji (2 года назад)
Hi man am having problem with my Honda accord ecu the ect sensor did not have the 5v reference the car only start when dead cold and reading the volt without the ect it's showing 0.036v
LearningZone (2 года назад)
Seems internal voltage regulator went bad. You can use some other arrangement to create such working voltage. Means use some external voltage regulator. Or the perfect solution could be the repair of the ECU if you have enough electronics knowledge. Wish you good luck with your repair. Regards,
Saud Ashraf (2 года назад)
Sir as i have been watching your videos n it helps me alot. But now i am in prob with my nissan Pathfinder 2003 as it cranks it starts but it has acceleration prob.however machanic says its ecu prob and i have repaired it 3 time nd it gives me same prob every 5 to 6 days Pls help me out if its ecu prob what should i do
Saud Ashraf (2 года назад)
Thanku soo much sir . you gave me all your precious time. I hope your suggestion ll help me inshahAllah
LearningZone (2 года назад)
If you are repairing one ECU and that is giving you same problem repeatedly, it means the repair is not successful or the ECU circuit went overloaded. In such a situation a very perfect and extensive repair of the circuit is required or otherwise you can replace the whole ecu with another one. On the other hand if the problem is repeating with another replaced ecu, there seems to be some problem with your throttle body. Try replacing that one. Regards,
just 1 life (2 года назад)
your voice is soo annoying.. I wanna slap you
LearningZone (2 года назад)
Thanks dear friend for appreciation and good words. This channel is for people having mind set like you! Here problem is I am facing such mind sick people who have only one job, criticism. They can't do anything and they can't see others to do something. I can only say sorry to such ill mind people as they are deserving to give much more attention due to their illness and sickness. Hope you enjoy the video and learned something. Please stay tuned as I will upload more stuff. Regards,
LearningZone (2 года назад)
+VANflawless flawlessNIXION hahahahaha you will slap me? Take a shower! Give a look at your channel, nothing is your own there! even you don't have original logo! If my voice is annoying why did you come and watch my video? Who invited you? Better work on your channel instead of pointing others. Philosopher like you are coming daily on my channel and doing destructive comments like you did. But bear in mind this will not stop what I am doing! Stay tuned! This is not invitation!!!
soulmasterdw (2 года назад)
if you want to understand wat video about...... go microchip mcu sign up and look at there car ecu designs then figure out things like shift bit registers etc
soulmasterdw (2 года назад)
if u want a decent test bench u want to get into mcu programming and making digital emulators for all different car parts...... then u can simulate alot of engines pretty essay run ecu on bench XD
LearningZone (2 года назад)
Where to get one and for how much?
PIOMAD (2 года назад)
hello , i have ecu from ford c max , on mc33186dh 1 on leg for cp i have 25 volt , can u tell me what to check ? the trottle body do not have power
EndofUSA (2 года назад)
so for each test point, what does it all mean?
adil meo (1 год назад)
sir
Christian Robert Adzic (2 года назад)
Hi! I'm also interested what that signals on that TP are for? Each TP is describen in a service diagram and the must have value are also described there. I respect this video and I'm not a hater. I just interested to figure out your technic how your are make a decision which signal on that TP is ok and which is not. Actually, a signal can have more parameters than voltage high. So, how you know if you get pwm signal or only a jumping 5v signal because something is wrong in the circuit and the signal looks like similar as a pwm type? I actually a bit confused with this explanation: here is 5v, here is 12v here is square wave or whatever, without to have the parameters of the exactly TP...
LearningZone (2 года назад)
+EndofUSA That is explained in the video. Oscilloscope is a graphic voltmeter. A video soon will be upload on use and benefits of oscilloscope.
EndofUSA (2 года назад)
+LearningZone by testing each test point what are you looking for and what does the oscilloscope say for each graph?
LearningZone (2 года назад)
+EndofUSA I can't understand your question.
Waeil Tobgy (3 года назад)
perfect work man , i really learned from your video thanks alot
LearningZone (2 года назад)
+Waeil Tobgy That is great if you learned something.
Sss Ttt (3 года назад)
I see that the values of the voltages appear intermit . Aren't they dc ?
Sss Ttt (2 года назад)
What do you mean
LearningZone (2 года назад)
Some are DC some are chopped DC!
QWKZ (3 года назад)
your doing a good job don't worry about other peoples stupidity very informative
QWKZ (3 года назад)
haha i think that is best thing my friend i have a question for you if you have the time to answer you seem very knowledgeable about ecu components if that is the right terminology i have a motorbike i don't ride much and the battery gets disconnected but i must enter a pin every time i re connect i was thinking if i erase the immobilizer eeprom programming will i have to bother with this security system anymore will my motorbike operate correctly just minus the security? or if i reprogram the eeprom i am just learning about this in my own time thank you very much please get back to me at your earliest convenience 
LearningZone (3 года назад)
+Wize one Thanks friend for liking. You are right idiots are everywhere but I am not worrying them. When ever such bullshits are coming on my channel, I am simply blocking them from any stupid comments. Regards,
Sss Ttt (3 года назад)
good video
LearningZone (3 года назад)
+Sss Ttt Thanks.
saaed ibrahim (3 года назад)
you are a genius my friend i want your help for my Nissan sunny 2003 after I fix idle sensor I did relearning for it ,,,.relearning is go good but if I switch off the car ,,,the car go bad again,,,does ecu have small battery for memory like computer
LearningZone (3 года назад)
+saaed ibrahim No dear friend there is no battery instead the information you are storing is stored on a flash memory. Unfortunately there are such problems occurred sometimes as you stated due to bad design of the equipment design. You can overcome them by using different techniques and options. Try to compensate your idle air by mechanical adjustment if the electronic calibration may not help. Regards,
CARS LOVER (3 года назад)
use ova m to test dc ?
LearningZone (3 года назад)
+amjad amj Yes can be used but that time i was dealing both with waveform and DC so I used oscilloscope for DC as well as a voltmeter.
akshay acharya (3 года назад)
Good evening sir, what you have shown here is very informative, do you have ny idea on making an ECU TEST Bench !!!!
LearningZone (3 года назад)
+akshay acharya Thanks dear friend for nice comment. That is a good idea to make a test bench full of necessary test equipment but for me big problem is money. I can't offer big money for such a job. Regards,
Kit Chan (3 года назад)
Thank you
toolman talal (3 года назад)
thanks for sharing this video . i hope you can make a video about oscilloscope how to use and what for .
toolman talal (3 года назад)
+LearningZone thank you 
LearningZone (3 года назад)
+toolman talal Thank you very much dear friend Talal for understanding and liking the video. Sure I would shoot a video on Scope. Scope is something very useful and a bit confused test equipment. This is basic and a must used equipment. Regards,
LearningZone (3 года назад)
Unfortunately the people who don't understand the testing, they will thumb down. The reason for that a human has a nature that it opposes anything strange for it or to the matter one don't understand. I could say only sorry to them!
Rennard Clarkee (4 месяца назад)
Sir I have problem with my Nissan Tiida CVT 2012 a Air Condition guy fixed my AC and did not rap a wire properly in the engine this result in a grounds that burnt the Ac wire to the fuse box and make the car turn over but not start I took it to a technician where he changed the engine harness however he said I had to get a new ECU for the vehicle what could be the most common issue caused to have the car not start also wat could be issue inside the ECU to be damage and is it fixable ?
TheWertyu2007 (9 месяцев назад)
ha dont worry maybe to advanced for them .
JoeCnNd (1 год назад)
Yeah, no thumbs down needed. Great work, where did you get the diagram for your vehicle test points? I'm having an anti theft lock out and would love to get my checks right with my pico. it happen from jumping another car.
gan tulga (1 год назад)
Hello, please could uplaod on your youtube page for 2006 toyota corolla/XLI/ manual transmission model and serial number for me. Engine is 2NZ-F, it has automatic transmission. I'm still looking for it. thank you
AMAROC Atlas (1 год назад)
we didn't see how the baord was connected to power some missings let us confused.
Elnathan Hijmering (3 года назад)
do you repair Hyundai Accent CRDi 2006 ECU?
Elnathan Hijmering (1 год назад)
hi, can you send me an address so I can send the ECU for repair?
LearningZone (1 год назад)
I repair almost every thing!
oldskool funk (3 года назад)
Great info! How do we get information on PCM/ECM test points? 
tbbainter777 (3 года назад)
Thank you for such helpful videos.Without circuit diagram how did you determine or identify circuit test points and what readings are correct? Thanks for taking the time and sharing your knowledge.
LearningZone (3 года назад)
+tbbainter777 Dear friend schematic diagrams are impossible to obtain for such systems. You can just determine the test points and expect voltage levels and frequencies by your experience and understanding. Regards,
Arnaud Lecomte (4 года назад)
Merci ! That is thank you for this insightful tutorial !
LearningZone (4 года назад)
+Arnaud Lecomte Thanks for nice comment dear friend. Nice that you subscribed and you will get notification on each upload. Regards,
Param S (4 года назад)
Awesome video! How did you get the circuit diagram of ECU? I am looking for circuit diagram for ECU for 2002 Pathfinder. BTW, do you have any video to check the circuit of Immobilizer? That would be absolutely wonderful, if you could open up an immobilizer as well. After watching your videos and some research I understand how these components talk to each other. In fact, I just bought an oscilloscope. ;) Thanks.
LearningZone (4 года назад)
+Param S Dear friend ECU diagrams are not available to average diy like me or you! But you can test them using some techniques like one I showed here in this video. On immobilizer I have a video on Nissan Sunny immu testing and it is here on my channel. you can watch it. Also don't forget to subscribe on my channel if not yet subscribed. Regards, http://youtu.be/rJVKv5cTnY8
luis B. Henao J (4 года назад)
Hi ,, very good  and helpfull  ivideo, but I wnat to know how to get the electronic drawings, for Nissan computer  and  also for other brand names.  best regards.. Luis Henao.
LearningZone (4 года назад)
Thank you very much dear sir for subscription, liking and sharing video. May your couple always happy! Very nice to see both of you! ECU drawings are something a secrete of trade and companies are never sharing. Only there are some third party equipment who are providing help to figure out and repair such ECUs. Other thing to do is to collect chips data used and then try to trouble shoot such ecus. You have been come to proper place on my channel as you are Electronics enthusiast as I understood. I would upload tons of videos on all aspects of life. Regards,
zx8401ztv (4 года назад)
For accurate dc voltage measurement i tend to use a digital multimeter, oscilliscopes tend not to be too accurate, i seem to remember 3%. Also your multimeters resistance is typically 10million ohms so it would not affect delicate circuits, im waffling again ha ha :-))
LearningZone (4 года назад)
Yes you are correct. Multimeter are great to test for DC voltages and rms ac quantities. But problem is sometimes you are checking waveforms and intermittent behaviors so you are using oscilloscope then it is handy to use oscilloscope as a multimeter to test both AC and DC.

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