How To Diagnose A Faulty ECU With No Communication
Vložit
- čas přidán 4. 07. 2024
- No start of the vehicle and no direct communications to the engine management system - ECU fault right? Or could it be something else?
Let’s ask Tim…
www.ecutesting.com/ - Auta a dopravní prostředky
Man what an informative yet clear dissemination of ECM testing. I am much more cognizant of what is going on with the ecm in my vehicle .
Never have had a well tutorial explanation as this one . Great thanks
Using this video I found a problem with the ECU cable system that five previous mechanics could not find. Turned out to be a problem with the wire between the main relay and the fuse (the yellow lines at 4:05). Thanks a million :D
Great video and explanation. I tested my EUC that came with a swap kit for "crank but no start" with your information. After verifying all good grounds, constant 12v, and switched 12v, my EUC failed to pull the constant 12v to ground, allowing the relay to receive a negative signal and switch the relay on and provide power to the other side for boot up.
Now this is how an educational video should be made
Incredibly thorough. Great video. Thank you.
Thank you. Very well articulated.
Merci très bien expliqué.
Du Courage.👍
A superb video sir,very helpfull.thankyou.steve from the uk.
Thank you for a good through and simple explanation. Nice Work
thorough
Thank you very much helpful video 👍
From Nick Ayivor from London England UK 🇬🇧
Nicely explained!
Well presented; Sir. Thank You.
Excellent: really high quality info, thank you 👍
Tried to go to your website but said it was dodgy and sent me back, wanted to visit after the great video
Well explained with diagrams and meters to test appreciate and thanks for the efforts.👌👍
Thanks for the information
perfect explanations
Very Good explanation, Thank You, Subbed
Great video
Superb,presentation
What a great video
Good explaination.
Awesome very informative info. Thanks bro
thanks sir, this is very helpful info.
great video very informative
thank you for the tips ❤
Thanks very much for this well articulated video, am having the same issue with my Audi Q5 2010 ECU is burnt, am wondering the +be line was not fussed?
You are best of the best
This is very helpful as i am experiencing code po600 no communication can high on my 2005 volvo xc90. I will start with the main relay. Thanks
Thank you!
very good video
Thanks its valuable task. 👍👍👍👍
Brilliant video very helpful!!!!! Like from me
great video with good explanation. thank you
Nice one thank you
Nice explanations, unfortunately getting to some connections is the toughest part. It makes what could be a easy job a pain in the ass.
Great video I learned a considerable amount from watching this one video (now subscribed)
I have a Maxicue OBD reader and it has thrown up this fault
Audi A3 (8P)
Convenience system (TP)
01320 intermittent Climate control no communication
00352 intermittent terminal 30a open circuit
0095 intermittent Key 1; adaption limit exceeded Faulty or no basic setting/adaption
01565 Permanent Luggage space lighting Short circuit to ground
>
The 01565 may now shed some light (sorry about the pun) about the parasitic drain that I could not find.
But anyway the car is still driveable.
I look forward to your response
Tony
I have autel diagonisis tool somtimes it connot comunicat with the cun bus of
Hi I have a problem with my volkswagen passat cc 2011 cluster pannel no lights fans to start the vehicle the dashboard shows only parking light. What would be the problem..sir
Wonderful info, my weak battery 12.2V could be the blame.
You are amazing
Thank u once again
Hi, Very nicely explained. Can u pls. advise how various ics of ecu with pinout designation ( eg, Power ic etc) be identified ? Any book or website will be a great help.
Thanks for the advice! Im working on a Bobcat track loader, but I suspect the ecm protocol is likely very similar. These guys had the battery cables come off and shorted, which caused the machine to die. I suspect they fried something, but gotta figure out what
Hello sir I'm mdrubel mechnice from bangladsh good information thank sir
Have a suzuki xl7 that runs great when it's cold but once it been running. That's when I have issues. The speedometer sometimes works,the thermostat started running hot. The engine isn't hot at all. No leaks in the radiator. The engine light has come on, now it doesn't come on. The traction control light came on. Now it doesn't. It shifts hard,slipping, Complete stop then shift hards when going to complete stop. Sometimes it doesn't want to go into gear. Drives great when its cold. Any suggestions?
excellent great!
Very good video. Sir make video. Identify ECM IC . Check ingen , Race , Coil etc . Thanks ❤
Very helpful, thanks
Well explained !!
Ignition switch can be the problem ???
Thanks for your work 👌
Brilliant
My golf 4 engine runs smoothly but once or twice in a week it just shut down while in motion. But the moment you start the engine again it starts. What is responsible and runs without hesitation
Please can you advise as AA diagnosed my bmw e90 as no communication between ecu and engine but when ignition is on the fuel tank pump continues to run for a long time and also the starter
Great video and information on ECU's and CAN system. The ONLY drawback is the "music" that is dubbed in - it creates a strong desire to "Shut off the background noise".
Monka 1600 low mileage Drove parked then 2hrs later no crank no error code, Had RAC out problem with ECU 5amp fault. might be a broken lead due to the very hot weather, towed to Vauxhall for diagnostics. Got to wait till October. Told it will be expensive, could it be the ignition, we had this changed about 3/4 years ago by a different garage.
Hi Tim, i have a ford S max that wont let me clear codes and is limiting power while driiving like 2200rpm and then nothing turbo working drives fine unless you put your foot down and its like its in limp home mode but i can get on the motorway and do 80mph just takes forever.
any ideas ?
2008 2.0 tdci titanium. its like its bricked when you lock your mobile with the wrong code in it, turns up but its not doing much. how do i find which version of ECU i have to get 1 from you or send mine back to check it.
Thanks . I am same issue with merc . Not connecting to ecu , bit as my car is top condition otherwise
I have an ECU that the documentation says I should have 3-4vdc on the comm bus. i have 0vdc (flutters in the mV range, about 20 mV). Engine starts and runs fine. What would you check first?
I was wondering if a weak battery could also set code only because in the morning it seems like it has a weak cell in the battery that’s when it went off check engine light and then it starts right up afterwards easily when it’s been running
I have a nissan 2007 altima. Radiator fan is always on once engine starts. I did IPDM self test to confim IPDM and relays. And it was good. ECT sensor is good as well. Is there a way check signal from ECU to IPDM?
does it mean that ECU has power to energize the radiator fan relay even if the engine is off ?
Hi if the ecu is bad will the ac windows lights still work? My car isn't starting i had cleared a code and shut off the car using a scanner but after that the car isn't starting.
I replaced my instrument cluster . will not start . Lock smith tells me its the PCM. yet with old 1 truck ran . Can lock smith be right ?
Do you mind explaining the process and reasoning behind 2007-2010 Jeep Grand Cherokee ECM failures there are plenty of videos online of it and most go unresolved
Thank u for such a sensitive information
Pls am having a crank no start problem with my Daewoo matiz 3
I found at that there is no power going to the ignition coil. I don't know what to do now pls help me out
Hi . Do you have any video tutorial for testing ECU using tricore? Appreciate it
It checked all out good. Car starts but has a limp mode on it with a "dme internal failure" code in it. But its hard to call up a bad module
Did you change the tps at all.if they fail they can cause erratic idle
Hi Tim I have a Mini Cooper r56 what says the rear fog lights are faulty, but yet they and all the other lights work
So I have a 2019 F150 2.7liter turbo eco that has the engine light come on. When I read the OBD fault codes - they are U0422 BCM and the other U0252 Lost Communication with Lighting Control Module Rear "B"
After resetting these fault codes using FORSCAN - the engine fault light go OFF for a time - but comes back on a few days later with the same two fault codes. Can you help?
How to check Flexray bus? Did the procedure is same as Can bus testing. Thanks.
Hi ,sir can install ECU from Honda Civic ( auto transmission)to Honda City(manual transmission) hoping for your advice,thanks
did we need to put on igination on during the rest
Hi I have a Mondeo 2.0 Zetec petrol. It is showing a p0607 code and a P2110 code which is reported to be a common problem with this model either being the ECU or the throttle body. My throttle body appears to be ok . Could it be any other sensors causing this issue or Will it be the ecu the car goes into engine malfuction immediately the ignition is switched on even though engine is not running when engine running it mifires, Any help would be appreciated . Thank You.
Hi I’m working on a 2008 Nissan Armada, and I’m not getting a reading from my obd 2 ,also my indicator light for the gear is not lit up, there’s no service engine light displaying. I can’t self test the system and I hear clicking sounds in the rear of the truck. Please please help me out with this project if you would sir thank you In advance
Hi there. Good video I have a delphi mt05.3 ecu. And when I start my engine with engine light on it starts and dies I have had engine out 5 times and all is good new wire harness and still the same issue 😢 is it the ecu I am thinking of buying a new ecu witch is 160£ but I can get a same ecu but been told it needs matching up with my engine 😮 I don't no wot to do. It is also a efi scooter 125cc 2021
I have a 2006 Volvo XC90 AWD EU specs. The engine won’t start or even try to crank. Trouble code TCM 0032 and TCM 0A31. Would the ECM & TCM prevent the car from turning on?
Thank you very much I have hunda civic and the problem that I'm facing is, my car is working normal but it doesn't move quicke in this situation what do you address me to do thanks
Very sofesticate and compact iducation which requires good basic to understand the all.
1ST AND FORMOST, WHEN KEY IS TURNED TO ON POSITION, THE CHECK
ENGINE LIGHT SHOULD TURN ON AND STAY ON UNTIL THE ENGINE IS STARTED.
sir give me some idea in which in my isuzu wizard engine, no spray on injectors and in diagnostic port dispaly,comes out NOT DETECTED.is it possible that the ecu is defective?thnk you so much for your answer.
Hello, I have a 2014 Dodge Charger that refuses to communicate with obdII scanner. It also says to push in clutch and push start button? The car is automatic and refuses to start. Please help!
thanks for this educative video, my automatic transmission has been slipping while driving in 2nd and 3rd, my mechanic scanned the problem with a diagnostic computer and he said there's no communication between the ECM and TCM, he has advised that I replace the ECM. Can a faulty ECM also cause transmission problems?
Hi. Yes a faulty ECM can cause transmission problems like you are describing, especially if there is no communication between it and the TCM. If your mechanic has diagnosed the problem to be the ECM itself and not the can lines between it and the TCM, then it is likely it needs to be rebuilt or replaced. If you would like your ECM to be tested by us to confirm the fault then please email our technical support team at info@ecutesting.com with the following information. Your make and model of vehicle, the part number printed on your ECM, the symptoms of your fault including fault codes, and any attempted fixes/further diagnostic tests you or your mechanic have completed. They will advise your further. Thanks.
I need to replace an ECM on 2010 Audi Q5. Is there something I need to do like program it? I tried swapping an ECM from another Audi that was junked (Due to rh side impact) Everything was an exact match. But the car just cranked.
Very good video. Well explained. How to know VCU / ECU is functioning normal.? When connected all device in the CANBUS are good , but there is no way to know ECU is normal or not .
Hi. We're glad you liked the video! Determining if the ECU or VCU are functioning correctly isn't a straight forward process, especially if they are being effected by an intermittent fault. However the easiest way to identify a fault with them would be to scan the vehicle for any fault codes as these will give a description of where the fault could lie. That being said, some faults don't produce any codes, so another way to test the units are functioning normally would be to use live data monitoring to see how the unit is responding to sensor inputs in real time. Hope this helps!
@@Ecutestinglimited Thanks a lot
the big idea can this test be done out of car ? get ecu on bench and give it its vss and ignition on vss and ground can we see can communcation signals and relay on low command ?
Is there a website or where the website to have available circuit diagram from ECU watching from Al Khafji Saudi Arabia 👍
Great video just come across this now. Can i ask what prices are to check an ecu also whats the turnaround speed please
Hi. Thanks for the kind words, we are glad you found the video helpful! Our current testing fee is £45+VAT and our current turnaround is 2-3 days. This can differ depending on the type of unit you send in, so if you would like further information then please email our technical support team at info@ecutesting.com with the following details: You unit's part number, the make and model of the vehicle it is from, the details of the fault you are experiencing, and a description of any diagnostics already carried out. Thanks
Hello please I need your help I was driving my 09 Honda accord the other day it as never giving me any ecu related code before the car just dead on me o was told is the ecu so we get another used keihin ecu we even test it on another 09 Honda and it works perfectly but when we put it in my car same thing it didn’t start and is not communicating with scanner any help please
Thanks.I have a problem with no spark through the 4 ignition even I changed cam and crank sensor,reset timing and also changed relay same sick lie .
I don't know if you are still around but if so my problem is with a 2008 Saturn Aura XR 3.6 L . RPMs Idels great but as soon as you touch the accelerator the RPMs jump to over 3000 rpm and an alert comes on the dash traction control and ECU needs service and then that goes off with ECU off came on then went off. could this be a bad ECU????? Changed out the Throttle body with a new one. That's when the problem started with the idle racing., you thought I'm totally confused.
This video really helped me a lot but my only query is that, how do we get 5V on some engine sensors whilst we are using 12V battery
Hi. We are glad the video was helpful. Sensors which receive 5 volts are typically low-power sensors which only need 5 volts to operate and generate an output signal. These sensors receive their supply from the ECU which has internal voltage regulators to take the 12v supply from the battery and generate different voltages for other components on the vehicle such as sensors.
Thank you forbthe helpful video,My carkia rio 2013 has no continuity on my 1-2 ecu connection read as ETC MOTOR( +) and ETC motor (-) then no continuity on spark and throttlebody same in radiator fan sensor could you help me?thanks in advance
First thing.. thanks by share this valuable information; In another hand...I have facing an issue with a Land Rover ECU, during they scanning process is not recognized...I already checked: 1).- CAN Bus lines and they are working well. 2).- ECU voltage and ground feed are fine. They question is....could ECU lost "his" identification" after a short circuit ocurred during the engine replacement??? Your advice is well appreciated.
You need to have a diagnostic done. Sounds like a burned feed
Thank you for the video... but i have a problem on my 2008 kia ceed 1.6 diesel engine ECU got blown by touching the positive terminal of the battery ... car wont start again no check engine on dashboard... can a similar ECU be used?
If it is the ECU thats damaged and you are looking at replacing it then you will need to ensure you have the exact part numbers of the unit matching your current ECU, and you will likely need to code swap data from the old ECU to the new one. Alternatively we may be able to remanufacture your damaged unit, please email your part number to our technical support team on info@ecutesting.com and they will advise you further. Thanks.
I dont have any power feed or pulse going to the injectors. Is there something i can do
My car keeps going inactive with oil sensor or inaccurate. (Oil level sensor and switch both changed. ) keeps giving o2 censor error but that changed as well.
2004 Toyota RAV4 - crank no start issue:
hi, I have a 2004 Toyota RAV4 and it would not start on its original ECU, note when the ignition is turned on the battery charging light indictor does not come on and also the engine check light is not coming on. i replaced the ECU with another one that came in from New Zealand and after fixing the broken wires on the deceleration Sensor the car started once and died after 30 seconds. after that even the replaced ECU stopped showing the Engine check light and the battery charging light when the ignition is turned on and it would not start. when i scanned the car with a LAUNCH scanner, the ECU is accessible. It only shows the ABS and SRS scan results. What could be the problem. Does the 2004 RAV4 have CAN system on the car? note the only wires on the OBD2 connector are on Pins 4,7,9,12,13, 15 and 16.
Thank you for this video, it was very helpful.
Please answer this question.
Is the engine control unit No. 03G suitable to work in place of the engine control unit No. 038? Knowing that they are the same engine capacity.
The car type is Volkswagen Transporter 2007, the engine capacity is 1.9
WHAT ENGINE CONTROL MODULE IS SUITABLE FOR 2007 TRANSPORTER 1.9 ENGINE?
Hi,
I have a Volvo V50 that has problem with anti-skid, the faultcode is ABS-0101, I can switch the car on and off a few times and the fault is no longer present until the engine dtops and is restarted, then the samething is back
Our M.O.T. does not like this at all 😢
Do you have any leads where to begin a search?
Sinc. Paul