1. Disconnect the brake fluid level sensor connector from the master cylinder.
2. Inspect for continuity according to fluid level between the brake fluid level sensor terminals.

If not as indicated in the table, replace the reserve tank.

Brake Switch InspectionFront Seat Back Component [Vehicles Without Power Seat System] Removal/Installation
WARNING:
Handling a front seat (with built-in side air bag) improperly can accidentally
operate (deploy) the air bag, which may seriously injure you. Read the service
warnings before handling a front seat (with built-in side air bag)..
CAUTION:
After removing a front seat ...
Information Display Removal/Installation
CAUTION:
When replacing the information display, the configuration procedure must
be performed before removing the information display. The information display
will not operate normally if it is replaced without performing the configuration
procedure.
1. Perform the informatio ...
Immobilizer system
The Subaru Solterra is equipped with advanced key technology featuring
integrated transponder chips that communicate with the vehicle’s onboard system,
ensuring that the EV system can only be started with a properly registered key.
This significantly enhances protection against unauthorized ...