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 ProcedureRear Door Removal/Installation
WARNING:
Removing the rear door without supporting it could cause the rear door to
fall and cause serious injury. Always perform the procedure with at least another
person to prevent the rear door from falling.
1. Disconnect the negative battery cable..
2. Remove in the order i ...
Air Fuel Ratio (A/F) Sensor Inspection [Mzr 2.0, Mzr 2.5]
A/F Sensor Inspection
1. Connect the M-MDS to the DLC-2.
2. Switch the ignition to ON.
3. Warm up the engine to normal operating temperature.
4. Access the following PIDs using the M-MDS..
VSS (Vehicle speed)
RPM (Engine speed)
O2S11 (A/F sensor output current)
...
If you think something is wrong
If you observe any unusual behavior while operating your Subaru Solterra,
it may indicate that the vehicle requires inspection, adjustment, or repair. Promptly
contacting an authorized SUBARU dealer is strongly recommended to ensure continued
safety and reliability.
Visible symptoms
Fluid ...