Probably too late now, but this means it's attempting to start but isn't reading the correct signals, you'll need to open up both ecus and compare the pin-outs printed on the circuit board, maybe (and I mean maybe) it could be a matter of swapping around some wires But certain 4e & 5e engines have different types of ignition systems As for immobiliser, again you'll need to check the board for 'imi' and 'imo', if it doesn't have it printed on the board, then it probably won't have an immobiliser, and it should still start however immobiliser won't be functional But don't quote me on it