Hi all, Can anyone help me out with this please /

I have a Hymer Fiat ducato 2.3 55 plate and has been perfect for 4 years . Then I had a flat battery and the garage tried to jump start it with no avail ! So I fitted a brand new battery . Now it just turns over , And the immobiliser key code is not lighting up at all ..

Can anyone help please..

Thanks paul..

Hi
Just a thought, I was wondering if the inertia fuel cutoff switch has not been bumped whilst they tried to either jump start it or when the battery was replaced. It is located directly behind & to the right of the battery on the firewall on the 244 models (under the dash on X250 models), I assume 55 plate means registered/built 2005 ?? I am not sure if the light comes on when this is activated or not but it cuts the earth connection to the fuel pump.
As a test before resetting, normally you should be able to hear the pump working in the fuel tank under the vehicle on just turning the ignition on, don't try to start -pump stops after 10-15 seconds when pressure builds up if no pump operating noise is heard try -
Simply press the switch until it clicks home to restore the auxiliary pump earth connection
see previous post - https://www.fiatforum.com/ducato/254785-2-8jtd-injector-warning-light.html
Cheers

Hi , The internal pump is working .. I've sent the ECU of today to be decoded and checked .. tried every thing else..