MZR 2.0, MZR 2.5, MZR 2.3 DISI Turbo
1. Remove the vacuum hose..
2. Verify that air can be blown from the power brake unit side of the vacuum hose towards the intake manifold side, and that air cannot be blown in the opposite direction.

If there is any malfunction of the inner check valve, replace it together with the vacuum hose as a single unit.
SKYACTIV-G 2.0
1. Remove the vacuum hose..
2. Verify that air can be blown from the power brake unit side of the vacuum hose towards the vacuum pump side, and that air cannot be blown in the opposite direction.

If there is any malfunction of the inner check valve, replace it together with the vacuum hose as a single unit.
Vacuum Hose Removal/Installation [Skyactiv G 2.0]
Vacuum Pump Inspection [Skyactiv G 2.0]Charging tips
This section provides practical guidance on how to efficiently use
the charging system of the Subaru Solterra, as well as how to monitor and interpret
important charging-related information for optimal performance.
Systematically charging
To maximize the usability and convenience of the Subaru ...
Electric Variable Valve Timing Motor/Driver Inspection [Skyactiv G 2.0]
WARNING:
A hot engine can cause severe burns. Turn off the engine and wait until it
is cool before servicing.
CAUTION:
Do not disassemble the electric variable valve timing motor/driver because
it is a precision unit.
1. Remove the battery cover..
2. Disconnect th ...
Front Drain Hose Installation
CAUTION:
If the front drain hose is pinched or bent anywhere, the water in the hose
may not discharge and enter the inside of the vehicle. During and after installation
of the trims and the headliner, always make sure there is no interference with
the front drain hose. Fix any probl ...