INSPECTION PROCEDURE 2: Shift indicator light does not illuminate: Notes
WARNING: This page is about a different car, the 2015 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Connecting Special Tool MB991910 To Data Link Connector
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
CAUTION:
Whenever the ECU is replaced, ensure that the CAN bus lines are normal.