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 ProcedureBSM (Blind Spot Monitor)
In the Subaru Solterra, the Blind Spot Monitor (BSM) is an advanced
safety feature that utilizes rear side radar sensors positioned behind the left
and right sides of the rear bumper to assist the driver in detecting vehicles located
in areas that are difficult to see using mirrors alone.
WAR ...
Parking Support Brake function (pedestrians rear of the vehicle)
The Subaru Solterra is equipped with a rear camera-based detection
system capable of identifying pedestrians behind the vehicle while reversing. When
a pedestrian is detected and the system determines that collision risk is elevated,
an audible warning is issued. If the danger becomes critical ...
Transaxle Oil Replacement [G66 M R]
1. Park the vehicle on level ground.
2. Remove the aerodynamic under cover No.2..
3. Remove the drain plug and washer.
4. Drain the oil into a suitable container.
5. Install a new washer and the drain plug.
Tightening torque
39—59 N·m {4.0—6.0 kgf·m, 29—43 ft·lbf}
...