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/
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.
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
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?
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
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
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
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".
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?
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.
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
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
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
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?
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.
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
Great video. I have a problem. 2013 Tacoma 2.7L, I don't think this is relevant but lightning struck near the vehicle during a storm, truck started the next morning and while driving to town just shut down. No check engine light, cranks but no start, no communication, only with airbag. checked 5volt reference, 2.8 volts at mass air which I thought was not pulling down enough to be a grounded sensor but started disconnecting sensors anyway. of course all disconnected voltage came up to 3 volts but did not return to 5. Is the 2.8 volts at THA wire on maf to high to be a grounded circuit or sensor? Also can bus looks hashed.
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
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.
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
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 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?
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
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.
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. 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.
i'm one of your subscriber , from Philippines, I like the way your presentation, can you give us a tutorial, on how to open and checking component of ecu and automatic transmission control and repair as well. Thank you sir.
Great vid! I have Avesis T25, no start after shorting the battery to ground, what is likely to be the problem? All the fuses test ok, unless there are some hidden ones.
Great video! These are the steps I need to perform on my Z3. After receiving a cloned DME, car cranks but no start, I still not sure where the DME relay is on my vehicle since it's at different locales between M43 and M44 engine. I have the M44. I have the right wiring diagram. Any advice is greatly appreciated, Thank you!
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
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!
Hi E90, cranks but no start + no communication to ecu. Followed your video and everything is fine to the point of having no 12v at 85 with ignition off Whilst having 12v present at 86 Any help would be much appreciated And thanks for the great professional video😅
Hi. If you are not getting 12v at 85, then there could be a problem with the wiring from the ECU to contact 85 or with the ECU itself. We would recommend inspecting the wiring and connectors/pins first and then continuity testing the wiring to rule it out. If it checks out OK then the fault will potentially lie with the ECU itself. If you would like to send your unit into us for testing to confirm this, please fill in our online test form at www.ecutesting.com. Thanks.
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.
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.
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
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 ?
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?
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.
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?
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
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.
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!
On Hyundai santafe 2014,My check engine light doesn’t come up at all. It doesn’t accelerate when I climb a hill even when the acceleration pedal is completely pressed and the engine does not go off. The fuel consumption is quite enormous as if the fuel is leaking. After diagonising, I have a P0365 (Exaust camshaft position sensor(CMP) B circuit fault (Bank 1). The sensor was checked okay. Even changed. After troubleshooting, it was concluded to change the ECU. What do you suggest?
Hi. We would recommend checking the wiring in the cam sensor circuit before condemning the ECU, as a short or open in this circuit could lead to the symptoms you are describing and the P0365 code. We have a video on how to do this here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-FTY11IeWBsk.html. If the wiring checks out OK then it is more than likely the fault is being caused by the ECU. If you would like to send your unit into us for testing to confirm this, please fill in our online test form here: myaccount.ecutesting.com/
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.
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.
