Trouble Diagnosis For Unusual Pressure
WARNING: This page is about a different car, the 2016 Infiniti QX70. However, it is still accessible from the selected car via links, so may be relevant.
Diagnose using a manifold gauge whenever system's high and/or low side pressure(s) is/are unusual. The marker above the gauge scale in the following tables indicates the standard (usual) pressure range. Refer to above table (Ambient air temperature - to - operating pressure table) since the standard (usual) pressure, however, differs from vehicle to vehicle.