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]If a warning light turns on or a warning buzzer sounds
If any warning indicator illuminates or a buzzer is activated in
your Subaru Solterra, remain calm and take appropriate action. A warning light that
briefly turns on and then goes off does not always indicate a malfunction. However,
if the issue repeats or persists, it is recommended to have t ...
Steering Wheel And Column Inspection
Play Inspection
1. With the wheels in the straight-ahead position, start the engine.
2. Turn the steering wheel to the left and right gently, then verify that the
steering wheel play is within the specification.
Steering wheel play
0—30 mm {0—1.18 in} (When hydraulic operating)
...
Wheel Hub, Steering Knuckle Disassembly/Assembly
1. Disassemble in the order indicated in the table.
1
Dust Cover
2
Wheel hub component
.
3
Retaining clip
4
Wheel bearing
(See Wheel Bearing Removal Note.)
(See Wheel Bearing In ...