1. Measure the temperature around the ambient temperature sensor and measure the resistance between the ambient temperature sensor terminal.

If the characteristics of the ambient temperature sensor are not as shown in the graph, replace the ambient temperature sensor.
Ambient Temperature Sensor Inspection [Manual Air Conditioner]SRS airbags
The SRS airbag system in the Subaru Solterra is engineered to deploy
during specific types of severe impacts that may otherwise cause serious harm to
vehicle occupants. These advanced airbags function in combination with seat belts
to significantly reduce the risk of fatal or severe injuries.
...
Transaxle Oil Replacement [A26 M R]
1. Park the vehicle on level ground.
2. Remove the aerodynamic under cover No.2..
3. Remove the drain plug and gasket.
4. Drain the oil into a suitable container.
5. Install a new gasket and the drain plug.
Tightening torque
28—51 N·m {2.9—5.2 kgf·m, 21—37 ft·lbf}
...
Rear Washer Hose Removal/Installation
1. Disconnect the negative battery cable..
2. Remove the front mudguard (RH)..
3. Disconnect rear washer hose A from the washer motor.
4. Remove the rear washer hose A from clip A, B, C, D, E, F, G.
5. Disconnect joint pipes and remove rear washer hose A.
6. Partially peel back the sea ...