Because the antenna system is equipped with a capacitor, the continuity cannot be checked. Therefore proceed the following simple inspection.
Turn the AM radio on.
Tune to the frequency that there is no broadcast and you will hear a buzzing sound.
Turn a work light on and shake it around the antenna rod. (around 10—20 mm {0.40—0.78 in})
CAUTION:
Use a fluorescent light type for the inspection. Accurate diagnostic cannot be done with a different type of light.

If a whirring sound from the speaker synchronized to the work light movement is confirmed, the antenna system is normal.
Coil Antenna Removal/Installation
Entertainment Personalization Features Setting ProcedureUsing My Room Mode
In the Subaru Solterra, when the charging cable is connected, selected
electrical systems such as the climate control and audio setup can operate using
energy supplied directly from an external power source, allowing you to comfortably
use the vehicle interior without relying entirely on the t ...
Variable Tumble Solenoid Valve Inspection [Mzr 2.0, Mzr 2.5]
Airflow Inspection
1. Remove the battery cover..
2. Disconnect the negative battery cable..
3. Remove the variable tumble solenoid valve..
4. Inspect airflow between the ports under the following conditions.
If not as specified, replace the variable tumble solenoid valve..
...
Liftgate Side Trim Removal/Installation
1. Remove the liftgate upper trim..
2. Pull the point A of the strap hanger as shown in the figure.
3. Remove the strap hanger.
4. Remove the fastener.
5. Pull the liftgate side trim in the direction of arrow then remove clip A.
6. Detach tab B and C while pulling the liftgate sid ...