A/C System Performance

WARNING: This page is about a different car, the 1998 Acura 3.2TL. However, it is still accessible from the selected car via links, so may be relevant.

Park vehicle out of direct sunlight. Open engine hood. Open front doors. Connect A/C pressure gauges to pressure ports. Measure relative humidity and ambient air temperature.
Move temperature control dial to coldest setting. Select vent mode. Select recirculated air position. Insert a thermometer in center vent outlet. Turn A/C switch on, and set blower switch to highest speed. Run engine at 1500 RPM. Ensure no one is inside vehicle.
After running A/C for 10 minutes, check temperature at center vent outlet. Check A/C system pressures. If temperature and pressures match A/C system performance test chart, A/C system is operating properly at this time. See Fig 1 or Fig 2 .

Fig 1: A/C System Performance Test Chart (Degrees F & psi)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 2: A/C System Performance Test Chart (Degrees C & kg/cm2)

Courtesy of AMERICAN HONDA MOTOR CO., INC.