Refrigerant Pressure with Manifold Gauge Set: Procedure

WARNING: This page is about a different car, the 2013 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

Place the vehicle in the shade and windless condition.
Open the front hood.
Connect the manifold gauge set.
Open the front windows and close all doors.
Increase the engine to 1, 500 rpm.
Turn the A/C switch to ON.
Turn the temperature control dial to MAX COOL position.
Turn the FRESH/RECIRC switch to RECIRC position.
Turn the fan speed control dial or switch to HI (MAX) position.
Read the gauge.
Specification:

Low pressure: 127 - 196 kPa (1.3 - 2.0 kgf/cm ² , 18 - 28 psi)

High pressure: 1, 471 - 1, 667 kPa (15 - 17 kgf/cm ² , 213 - 242 psi)

Ambient temperature: 30 - 35°C (86 - 95°F)