V70 ECU problem

[andyducati]

Hi,
I recently got a V70 T5 Manual (my1997) which had a few issues. No prob I thought.
Someone had bodged the CEL to go off with the batt warning light. Sorted that out and found codes logged. Got these cleared and in the process found i had the wrong ECU in. It should be a M4.4 but it has a 1994 850 T5 auto M4.3 (0 261 203 073 (074).).
I managed to get a correct ECU for the car but on trying it the engine cuts after 1 second. I tried a similar one with the same result. I put my old one back in and the car runs fine.
How can I get the later (correct) M4.4 ECU to work with my car?
Is there something with the immobiliser because when i look at the immobiliser with vol-fcr I get a code up which says,
'IMM-321 INITIATING SIGNAL ABSENT FROM ECM'. How do I sort this out.
I also reprogrammed the ECU using Motronic Suite and used a .bin file from 850 T5 manual which worked fine. But there are 2 different .bin files for the 850 manual ECU's. 2 software variants. One has a number that starts with 2. (these work in my early ECU in my car) and the other which starst with 1 (these dont work in my ECU. Engine cuts out after 1 second)
Does anyone know what the difference in these software variants is?

Cheers in advance.
Andy

[misha]

...in the process found i had the wrong ECU in. It should be a M4.4 but it has a 1994 850 T5 auto M4.3.

It's not necesserilly that you must have M4.4.

On 1997 T5, there was also a set-up with M4.3 ecu.Usually ALL T5 engines untill 1998 had M4.3 ecu.Of course...there are always exceptions and those exceptions vary from market to market.

Questions for you:
-do you have chipped(code)key----ignition key?
-do you have remote fob?

*****How can I get the later (correct) M4.4 ECU to work with my car?*****

You can send it to http://ipdusa.com/ and they can perform immobiliser delete.

Since your car turns off itself after a second or two...that means that immobiliser kicks in .

Try to pull out the fuse(s) for immobiliser at fuse panel,and try to start the car without them.It shoud start and run fine.

Also there is something else that you can do...You can perform immobiliser bypass like this:

From 210-211 relay unit chose 210 and jump 50E & 50F terminals.This bypasses immobiliser.

Relay location is in this pdf on page no.4:

anti theft system.pdf

(508.16 KiB) Downloaded 787 times

Hope that this helped.

[jimmy57]

I think UK registration for model year does not recognize early build cars as the next model year. 98's were built from week 4 1997 for US and maybe earlier for other markets, but those built as V70 T5 would be M4.4.
I'm not familiar with how M4.4 is "married" to the Immo system. USA models didn't get Immo until 99 with yet different engine management and CAN networking.