How To Diagnose A Faulty ECU With No Communication

my ford galaxy runs but wont rev above 1000 revs showing no fault codes other than no signal when plug in odb reader yet on dash theirs an air bag fauly flashing glow plug light and problem with the abs and its saying take vehicle in for service whats the problem

Very good video. Sir make video. Identify ECM IC . Check ingen , Race , Coil etc . Thanks ❤

great video very informative

where is a good place to get ecu tested cheaply without being conned

Stopper after 1sec

Mines ECU is going bad in my 2012 impala

I have a VW Tiguan 2011 model,it crank but not start. When I diagnose the car it give me 01314 code. What is the problem with the car?

Never have had a well tutorial explanation as this one . Great 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.

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

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.

I have Honda Jazz error in communication with ECU??? Any thoughts thanks

Is the ECU and ECM the same thing? Is the ECU and PCM the same thing?

Thanks for your work 👌

Ser pwdng mlman ang no, MO? May iffgwa rin sana akong kagaya nyn toyote corolla dn GLI sana txk MO akong ito thnks hnty ko ang txks moko sa no,

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 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

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Need only 10s to see ecu .You need 1 hours

My husband was thinking it was the starter, I was thinking wiring. Changed out starter, now truck want start. 2012 Chevrolet Colorado. HELP

Hi guys, very informative video thanks 😊. I have an intermittent no crank on a A4 B8 CAGA TDI. When the car won't start, the main relay (T30) goes bonkers, clicking in and out. Pin 86 and 30 have constant battery voltage when the T30 relay is doing this clicking, pin 85 (ground switch from ecu) has battery voltage until ignition on and then has 1.04v.... I've been over and over the wiring and I can't find any issue. My question is: Should pin 85 drop to 0v as its ground switched by the ECU? This A4 only drops to 1.04v and there perfect continuity on th8s very short wire from pin 85 to ECU, no voltage drop on that wire either. Would very much appreciate a response from your experience 👍

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.

Hello sir. I have a 2007 Volvo c70, no crank no srart. Alarm works, door locks work, headlights work. Car was flooded. How can I know If ECM is dead? Or should I try something else?.... we jumped the start relay and it cranks

My customers car 2011 Altima hybrid no communication with as follows hybrid system abs transmission and power steering

Good explaination.

Dia berkata, "jika ada apa-apa pertanyaan, tulis di ruang komen..". Namun tidak ada satu pun komen yang direspon. 🥴

Hi, my BMW F36 wont start or crank. ISTA shows no communication with DDE ECU. Tested Relay and all fuses all good, there is 12v at the relevant pins on the ECU connector and Grounds to chassis 0ohms. Particular fault that catches my eye is (Wake Up line to the intelligent battery sensor short circuit to B+ or disconnected), Any advice appreiciated

My Ford Territory had ECM problems. Had it replaced numerous times. Now the front right brake locks up the wheel. Had the vehicle towed back to the workshop. After 4 weeks in the workshop I still have not been contacted yet. I told them I don't want the car back unless they can guarantee me that the car is Safe to drive. Will probably NEVER get the car back... (NOT HAPPY)

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 .

My zafira tourer 2015 has this code : U0100 and car not starting . Please suggest what needs to be repaired

do i have to send slioniods as wel it's off reedy to ship in mornin

Hello sir I'm mdrubel mechnice from bangladsh good information thank sir

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.

I have an old toyota land cruiser and I cant find anywhere that is able to test the ecu. Help!

I have bmw 320i e90 2006 everything works fine but the is no crank and doesn't start

I have a 2016 sentra and code had a bad airflow sensor i out the new sensor and car starts but then shuts off my friend tried to connects his scanning tool and the tool doesnt turn on can it be de ecu??

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😅

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 dear sir, in my car have loss acceleration and when i give acceleration there is voice and car jerking, i changed plugs, coils, camsensor but still i’m getting error p0344 in honda civic 2017 please help me I’m suffering by the way i changed the battery before it was 5amp now 4.5 amp is it battery issue or ecm? Because my car start good if there is battery it will not start good right?

I was just told by the dealer they will NOT be able to fix my 2004 ML350 because they could not find an AAM for it (discontinued). Is there anything else I can do other than junk car, because it has a good engine, trans, body, everything. What do you say?"

2010 Chev HHR, I was programming remotes wth Autel AP 200 programmer, software on an ipad.
Ipad shut down while trying to communicate with the vehicle.
Chime went off, door locks cycled, gauge needles cycled, everything went dead.
Any insight into what has been damaged? Needs to be replaced?
Thanks in advance

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.

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!

Hello I came across this video and I am having same kind of issue car cranks but does not start-no spark no pump noice running, on dashboard all lights comes on and off but I don’t have check engine light on off at all plz help
1997 Toyota Supra
Japan version Jdm
2jzgte automatic

Caused
Parked for 6 months and boost up to start and than turned off than crank it was low battery voltage and it cranked and than click sound it never start checked fuse box but can’t get to fire all I know I am missing engine on dash sign in starting when ignition switch on

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?

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The pencil coil melted while the car was moving and it only cranks. What is the possible or cause of the problem

How do you test the ECM pis with a multimeter if the plug is inserted into the ECM sockets?

How do I send you a photo

I dont have any power feed or pulse going to the injectors. Is there something i can do