Corsa D 1.2 z12xep engine ECU no communication and F on dashboard

[Nicolos]

Hello everybody
I have a Corsa D 1.2 Z12XEP.
After replacement of the engine there is not communication with ECU and there is a F on dashboard.
I think the problem is not the ecu.
I have Tech2 scanner ,full scan all the modules are present but with engine ecu there is not communication .I checked all the fuses and relay.
I have test another ECU but again "no communication ".
Anybody with the same problem?
What else I must check?

[autoden]

Try a jump cable from battery -12 to ecu frame.

[Nicolos]

Try a jump cable from battery -12 to ecu frame.

On the metal frame there is a ground wire.Where exactly I must jump the cable?I don't see how to do this.

[Nicolos]

Try a jump cable from battery -12 to ecu frame.

On the metal frame there is a ground wire.Where exactly I must jump the cable?I don't see how to do this.
20190406_182212.jpg

[pocinas]

Did you check ecu communication on the Bench?

[Nicolos]

There is no communication with ecu.i scan with Tech2 and opcom.Like ecu is not existing. I try a new one and the same"no communication "

[Panathaole]

Check engine to chassis ground cable... As mentioned use directly negative cable from battery to ecu...
You have power at ecu pins?

[Nicolos]

Il check it tomorrow. I have tis 2000 and i will check terminal 51 on XC2 ( Connector to ECU).
20190406_210309.jpg
But now you mention this I think the Brown cable (ground)was cracked.

[Nicolos]

Try a jump cable from battery -12 to ecu frame.

You mean ground?

[Nicolos]

Check engine to chassis ground cable... As mentioned use directly negative cable from battery to ecu...
You have power at ecu pins?

Problem solved!!!
You were right.Ground cable was defect.No ground.

[Nicolos]

Problem solved.
Brown cable is ground on ecu.
Not grounded!
20190407_150327.jpg
I put a new ground cable and all is ok
20190407_150348.jpg
Thanks to all for your Help.
Saves me a lot of time of research.

[autoden]

Now we help you, what about you hit the thanks button!