Airflow Inspection
1. Remove the vacuum hose..
2. Blow air into the vacuum hose using your mouth from the vacuum pump side and verify that the air flows to the intake manifold side, then blow air from the intake manifold side and verify that the air does not flow to the vacuum pump side.

If there is any malfunction in the check valve, replace it with the vacuum hose as a single unit..
Air Bypass Valve Inspection [Mzr 2.3 Disi Turbo]
Compression Inspection [Mzr 2.0, Mzr 2.5]ALL AUTO (ECO) control
In the Subaru Solterra, the ALL AUTO (ECO) control intelligently
manages interior comfort by automatically adjusting seat heaters/radiant heaters*,
seat ventilators*, and the heated steering wheel* based on the selected climate
settings, as well as real-time cabin and outside temperature condi ...
Vacuum Pump Inspection [Skyactiv G 2.0]
1. Pinch open the clamp using pliers and disconnect the vacuum hose from the
vacuum pump.
2. Install the vacuum gauge as shown in the figure, then check the vacuum.
3. Warn up the engine.
If the pressure is less than the specification, inspect for the following.
M ...
RCTA (Rear Cross Traffic Alert)
The Subaru Solterra RCTA (Rear Cross Traffic Alert) system utilizes
rear side radar sensors integrated behind the rear bumper. This advanced feature
is designed to assist the driver by monitoring areas that are difficult to see while
reversing, significantly improving situational awareness.
W ...