Engine control unit ECU Repair, Land Rover LR3, LR4, Discover 3

[@Vera_and_Christian]

Good Job René. I did have issues with the slodering points of the connectors before. Christian

[@techtips101]

Thank you so much - and thanks for watching and commenting, yes, this issue that I had has now totally disappeared, and we are enjoying the Land Rover again. It’s wet season here, and there will be a few trips to the watering fields in the next coming days to go hunting, hopefully it will be with no problems at all now. 👍👍 Drive safely Best regards Rene.

[@pg9112471]

Just bought an lr4 with 100000 miles for my wife. Im doing the timing chain but took it to get emissions and it wouldn't connect. I suspect the same or similar problem.

[@techtips101]

Thank you for watching and commenting, congratulations with your new car. To answer your question it could be one of the reasons. But if you buy a cheap OBD reader on Amazon it should tell you if it connects. It is hard for me to judge if this could be the problem, however it could be. The ECU and TCM modules are located in a known water intrusion area on the LR’s and therefore you could see this as a result. The OBD reader will give you the readings if it connects and then you know. I hope this helps a little Drive safely, best regards Rene.

[@joseglez6090]

Qué pena que no grabes como se desmonta y como se vuelve a montar, ya que a veces es muy difícil hacerlo por no tener idea....

[@techtips101]

I am so sorry I don’t speak Spanish so unable to help. Drive safely best regards Rene

[@AdrianVann]

Mine doesn’t have that ground screw as well inside the ECM as well. I wonder if it actually doesn’t come with one?

[@techtips101]

Yes that could be or it an assembly with missing screws, Mine has been functioning very well since drive safely Best regards Rene

[@BigDaddy-zh2rc]

Could the ECU affect the clutch fan? I've put in two different clutch fans and both are spinning at engine speed. The only code is fan circuit.

[@techtips101]

Thanks for watching, I am a little unsure if it would, but I would NOT be surprised at all since it has a feeler in almost any circuit associated with the engine. hope that helps Best regards Rene

[@Land-Sea-Air]

My lr3 ecu got water in it as well, pulled it out and actually poured about a cup of water out of it, dried it out inside and still won't function or communicate with my scan tool, I assume it has failed at this point, do you know what cheap software would be capable of coding a used box? Or am I stuck with the dealer or a 2,000 dollar land rover specific scan tool? Thanks

[@techtips101]

Oh that is a tough one - how about getting one from a used car - doner car from a scrap yard or eBay maybe. - the electronic chip inside do not like the water and that’s why it’s most likely dead. Make sure you make the new one water resistant so you don’t run into the same problem later. Sorry if I wasn’t of much help, but that’s a weak area of the car in this corner. Make sure you check up on the TCM module as well, most likely this has gotten water too. Drive safely, best regards Rene

[@onetwoyouadeadman]

@@techtips101 I have a lr3 key was stolen out of the car while waiting for transport I have a second lr3 same year bad engine what do I need too replace with the ignition from other car too start the vehicle again with used key and ignition ?

[@overlandi5056]

A good idea is to seal the unit with sikoflex .

[@techtips101]

Yes that is a good idea 👍👍 I will do that next time I get them both out (TCM and ECM), it is soft enough to disassemble it again without damaging the unit too 👍👍 great idea 👍 drive safely best regards Rene

[@overlandi5056]

@@techtips101 yes, you can get it apart again, you could always warm it up with a hair drier or similar. We all do this fix in Africa to save our ECUs etc.

[@techtips101]

@@overlandi5056 very good idea, can inform you the Land Rover survived the hurricane Ian, but was extremely flooded - but hat a few Po codes and now running flawless again :D

[@liamdtraxxas2011]

I'm sure it's battery acid on the plastic bit in between the tcm and ecm

[@techtips101]

Could be - however the Land Rover is build with such poor plastic quality that the fairings below the windows dry rot over the years in hot sun - this causes a leak running straight down onto the module creating the issue I had. Of battery acid would do the same, to a certain extend, but I haven’t had any leaks there, so in my case it was excluded quickly. Thanks for commenting and watching though, and the Mandy has been running great since. Drive safely, best regards Rene

[@liamdtraxxas2011]

That's good she's running well. Mine still giving me shit ive pulled and checked every fuse in the engine bay fuse box and behind the glove box. Checked every earth point I could see, unplugged every wiring harness plug checked and cleaned and electrical lube on everything, Just got the clocks/instrument cluster bk from being repaired it needed to be fixed as I had a light on all the time. I'll put the clocks bk in tomorrow if i still have no joy, gona do the cambus test through the obd port and go from there

[@techtips101]

@@liamdtraxxas2011 what is the exact problem ? The LR3 does so many weird things for small problems too, and many times it seems so simple but yet so distant to solve. 🤗

[@SamsAutomotiveS]

Can you tune a disco 2 ecm?

[@techtips101]

Thank for commenting and watching, no I am unable to do that unfortunately, but that could be a good idea for the next Video. Thank you for asking. Drive safely Best regards Rene

[@SamsAutomotiveS]

@@techtips101 duno how far have you gone with this cars,but im having a issue i have disco 2 with sai. Secondary air injection,so as remedy i want to install a none sai ecu,but i see a vin number so my question its if the VIN ints on the ecm or the bcu,whats are the pressure when your swap ecu`s.

[@techtips101]

Oh I am sorry that I wouldn’t happen to know - I guess it’s always worth a try, however it could be an expensive experience to play with. Drive safely, best regards Rene

[@nirmalnedimaram7235]

Hi, when i try to do a scanning on my 2005 LR3 V8 4.4 only the ELM is connected the ECU is not getting connected, can you pls tell me the possible reason for this.

[@techtips101]

this could very easily be a sign of water penetration, corrosion or no ground connection. Have a look at my comment above e that might close you in on the target and failure. best regards Rene