td5 ecu and 10as

hi i recently bought a project 2005 defender 110 td5 van type body from a local auction which had previously belonged to an electricity company. the vheicle had been cannibalised and lots of parts are missing. the ecu was gone and i purchased another on ebay nnn500020. ive fitted the ecu and with a bearmach hawkeye coded in the injectors. my question is how do i match the ecu to the 10as immobiliser unit. the vehicle cranks but the fuel pump isnt running but the fuel pump relay is energised
which could be just a pump problem. im assuming that its a fairly basic 10as
thanks john

Well ignoring the immobiliser issue, if the fuel pump relay is energised surely the pump should be running as the trigger signal must come from the ecu?
So could it be as simple as dead pump?
Cant be to hard to try you own power supply to the pump?