1. Disconnect the negative battery cable..
2. Remove the front bumper..
3. Verify that continuity between the washer fluid-level sensor terminals is as indicated in the table.

If not as specified, replace the washer fluid-level sensor.

Windshield Washer Nozzle Removal/Installation
Washer Fluid Level Sensor Removal/InstallationForced Ignition On [With Advanced Keyless Entry And Push Button Start System]
NOTE:
In order to perform a forced ignition ON, the M-MDS (IDS) is necessary. If
the servicing is being done outside of an Authorized Mazda dealership, contact
an Authorized Mazda dealership for instructions.
The forced ignition ON procedure forces a power supply to each part w ...
ABS HU/CM Inspection
1. Disconnect the ABS HU/CM connector..
2. Connect the negative battery cable..
3. Attach the tester lead to the ABS HU/CM wiring harness-side connector and
inspect the voltage, continuity, or resistance according to the standard (reference
value) in the table below.
Standard (reference)
...
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 ...