Pressure Switch (Dual Switch): Inspection

WARNING: This page is about a different car, the 2003 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.

Connect the manifold gauge to the service valve on the high-pressure side.
Remove the pressure switch harness connector.
Using a circuit tester, inspect the ON-OFF operation of the pressure switch.

Fig 1: Identifying Pressure Switch (Dual Switch) Terminals
Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Pressure Switch (Dual Switch) Inspection Chart
Courtesy of SUBARU OF AMERICA, INC.