1. Remove the catch tank..
2. Plug the catch tank of the purge solenoid valve side.

3. Inspect for air leakage when blowing air pressure from charcoal canister side.
If there is air leakage, replace the catch tank..
Canister Vent (Cv) Solenoid Valve Removal/Installation [Mzr 2.0, Mzr 2.5]
Charcoal Canister Inspection [Mzr 2.0, Mzr 2.5]For your information
Main Owner's Manual
This comprehensive Owner’s Manual for the Subaru Solterra has been carefully
designed to cover the full range of models, trims, and available equipment, including
optional features that may not be installed on your specific vehicle. As a result,
you may encounter descrip ...
Starter Inspection [Mzr 2.0, Mzr 2.5]
On-vehicle Inspection
1. Verify that the battery is fully charged.
2. The starter is normal if it rotates smoothly and without any noise when the
engine is cranked.
If the starter does not operate, inspect the following:
Remove the starter, and inspect the starter unit.
...
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 ...