Registration flow chart
WARNING: This page is about a different car, the 2008 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Do not replace the ECM and the WCM simultaneously. Always replace the ECU by ones when the multiple ECU is replaced, and then replace the next ECU after registering the necessary IDs.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.