Delivery (Test) Mode Connector

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.

Turn the ignition switch to ON and check that the malfunction indicator light starts blinking.
If the light blinks, return the ignition key to LOCK.

Fig 1: Identifying Delivery (Test) Mode Connector
Courtesy of SUBARU OF AMERICA, INC.
Disconnect the delivery (test) mode connector under the passenger's seat.
Then, turn the ignition key to ON again.
If the malfunction indicator light blinks even though the delivery (test) mode connector is disconnected, carry out an engine diagnosis.
Put the disconnected delivery (test) mode connector behind the ECM protector.

Fig 2: Identifying Delivery (Test) Mode Connector And ECM Protector
Courtesy of SUBARU OF AMERICA, INC.