Depress the button on the seat belt buckle.

Fastening the Seat Belt
Seat Belt ExtenderNeutral Switch Removal/Installation [C66 M R]
1. Remove the battery cover..
2. Disconnect the negative battery cable..
3. Remove the aerodynamic under cover No.2..
4. Install in the reverse order of removal.
5. Remove in the order indicated in the table.
6. Install in the reverse order of removal.
1
Neutr ...
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.
...
Checking and replacing fuses
If any electrical system in your Subaru Solterra stops functioning,
it may be caused by a blown fuse. In such cases, inspect the fuse and replace it
if necessary to restore proper operation.
Checking and replacing fuses
1. Switch the power OFF in your Subaru Solterra completely before starting ...