With Audio Unit (Without Display)
1. Verify that the continuity is as indicated in the table.

If not as indicated in the table, replace the GPS antenna feeder.

With Audio Unit (With Display)
NOTE:
GPS antenna feeder is integrated with the antenna feeder No.4.
1. Refer to ANTENNA FEEDER NO.4 INSPECTION
Global Positioning System (Gps) Antenna Removal/Installation
Gps Antenna Feeder Removal/InstallationAuto Dimming Mirror Inspection
1. Measure the voltage at each terminal.
If the voltage is not as specified in the Terminal Voltage Table (Reference),
inspect the parts under “Inspection item (s)” and related wiring harnesses.
If the system does not work properly even though the inspection items
or ...
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 ...
Power Window System Initialization Procedure
NOTE:
If the following operations have been performed, initial setting is reset,
and auto up/down and two-step down operation are disabled. Therefore, performing
initial setting is necessary.
Negative battery cable is disconnected.
Power window main switch ...