We really need pictures at this point to understand what you mean

 

This is the two units, the blue connector is my existing BCM, the other is the doner.

 

 

Blue is for KEYLESS entry

So if yours has Keyless wrong UCH ( BCM)

 

Thanks for the advice, Mine has the keyless entry. Do you know if the car would start without this if plugged into the key housing? It’s really just enough to narrow out if my existing ECU is the issue or not.

 

Not a clue sorry.

But should you fit it and the car wont go, you still wont be sure its not because of the UCH is incorrect , or you have another issue..

BUT going to ask, TIMING was checked here.
Turning the key, or pressing stop start button, if Timing belt has failed will give you that fault,

Internal electric fault inside A ECU is not usually the ECU, but a sensor is not being able to be read correctly, as in, its working, circuit is fine, but ECU cannot make head nor tail of it

 

Not a clue sorry.

But should you fit it and the car wont go, you still wont be sure its not because of the UCH is incorrect , or you have another issue..

BUT going to ask, TIMING was checked here.
Turning the key, or pressing stop start button, if Timing belt has failed will give you that fault,

Internal electric fault inside A ECU is not usually the ECU, but a sensor is not being able to be read correctly, as in, its working, circuit is fine, but ECU cannot make head nor tail of it

We are going to plug the ECU kit in tomorrow to see if it will start at least. If however, we get it going, is it possible to code my previous BCM to the car?

Im near certain I got the belt and water pump replaced a few years back. I’ll ask the mechanic to double check this too.

Thanks again for the advice, I’ll update you tomorrow on our findings 🤞🏼

 

You might be able to code the UCH.
sorry wrong terminology , you need to go into UCH configuration, and change keyless to key
NOT saying it will work, but UCH will be the place to change configurations

 

We have now tried 2 different ECU kits on the car, both tries to turn over for around 1sec then cuts out and the keycard holder flashes.

Any ideas on what would be causing this?

Also, we have checked the timing belt which is fine.

 

Key not recognised if key reader is flashing

You are fitting the steering lock with the New key here, or steering lock with new key card?

 

Yes, we have fitted all of the kit detailed within this picture. If the car is carrying out a short turn over, surely the system is recognising the key card to a certain extent?

 

Update: ** Fixed **

We got the car started, turned out it was the ECU after all. The reason the keycard housing was flashing was because the steering column was not fully connected. When everything was connected it fired up. My only issue now is I’ve lost my wireless start ability because of the different BCM.

Does anyone know if it’s possible to recode my old BCM to this and would I be able to use my previous 2 key cards again?

Thanks

 

Hi there! I have been having the same Engine Failure Hazard fault come up. It has done it on a couple of occasions. Fortunately after removing the key card and locking the car and then getting back in it seems to work. On diagnostic it says ECU internal electrical fault. If we got hold of a second hand ECU and cloned the original would I have to change the steering lock as well or could the replacement ECU be programmed to work with my current steering column/lock and key?

Thanks
Jake