WARNING: This page is about a different car, the 2016 Hyundai Sonata and 2015 Hyundai Sonata. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect the front door outside handle connector (A).
Fig 1: Disconnecting Front Door Outside Handle Connector
Courtesy of HYUNDAI MOTOR AMERICA
Check for continuity between terminals No 3 and No 6.
Fig 2: Checking Continuity Between Terminals No 3 And 6