Check Body Integrated Unit Power Supply And Ground Circuit
WARNING: This page is about a different car, the 2013 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
Refer to the "INSPECTION of POWER SUPPLY AND GROUND CIRCUIT" of "Door Lock Control System" for detailed procedures. < Refer to CHECK POWER SUPPLY & GROUND CIRCUIT , INSPECTION, Door Lock Control System. >