1. Disconnect the negative battery cable..
2. Partially peel back the seaming welt.
3. Remove the liftgate upper trim..
4. Disconnect antenna feeder No.3 connector..
5. Visually inspect the glass antenna for damage.
6. Verify that the continuity between the glass antenna terminals is as indicated in the table.

If not as indicated in the table, repair the glass antenna..

Glass Antenna
Installation Of Radio SystemBattery [Skyactiv G 2.0]
Purpose, Function
The battery stores electricity generated by the generator. In addition, it
supplies power to electronic devices if necessary.
Construction
The battery is installed in the engine compartment. (vehicle left)
Fail-safe
Function not equipped.
...
Auto Light Sensor
Purpose
The auto light sensor detects the illumination level above and in front of
the vehicle and outputs it to the front body control module (FBCM).
Function
The auto-light sensor uses the upward illumination level sensor to detect
the illumination level above the vehicle ...
Brake Fluid Pressure Sensor
Purpose/Function
The brake fluid pressure sensor detects the fluid pressure from the master
cylinder and transmits it to the DSC HU/CM.
Construction
The brake fluid pressure sensor is built into the DSC HU/CM. Therefore if
there is any malfunction of the brake fluid pressur ...