how can i fix my renault laguna 2 04 1.9 dci?

been through hell and back trying 2 find a wiring diagram 4 the ecu. . . so far no joy, there are 9 different ecu's for this model alone. please can someone tell me if there is a website i can find it ( excluding autodata, tolerance, bosch ,verus as they have all given me the wrong info ) would be great??????