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]Electronic key battery
If the electronic key battery of your Subaru Solterra becomes depleted,
it should be replaced promptly to ensure uninterrupted operation of all key functions.
■ If the key battery is depleted
When the battery inside the Subaru Solterra electronic key weakens or fully discharges,
you may noti ...
Sunlight/Temperature Sensor
The climate control system measures
inside and outside temperatures, and
sunlight. It then sets temperatures inside
the passenger compartment accordingly.
CAUTION
Do not obstruct either sensor,
otherwise the climate control system
will not operate properly.
...
Units
Electric current
A (ampere)
Electric power
W (watt)
Electric resistance
ohm
Electric voltage
V (volt)
Length
mm (millimeter)
in (inch)
...