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]Automatic air conditioning system
In the Subaru Solterra, the automatic air conditioning system intelligently
regulates airflow distribution and fan speed in real time, ensuring that the interior
climate remains consistent with the selected temperature settings for maximum comfort
and efficiency.
Air conditioning controls
...
Lower Panel Removal/Installation
Driver-side
1. Disconnect the negative battery cable..
2. Remove the following parts:
a. Driver-side front scuff plate.
b. Driver-side front side trim.
c. Hood release lever.
d. Upper panel.
e. Shift knob (MTX).
f. Selector lever knob (ATX).
g. Shift panel.
h. Side wall.
i. Cons ...
Rear Door Speaker Removal/Installation
1. Disconnect the negative battery cable..
2. Remove the rear door trim..
3. Disconnect the connector.
Without Bose®
With Bose®
4. Remove the screw.
5. Remove the rear door speaker in the direction of the arrow shown in the figure.
Without Bose®
With Bose®
6. Insta ...