DTC B2779: Remote Control Engine Starter Communication Collation NG: DTC Detecting Condition
WARNING: This page is about a different car, the 2014 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
When the keyless access control module does not respond to engine start even when the remote control engine starter is ON, or when there is a code mismatch.