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A/C System Performance

  1. Park vehicle out of direct sunlight. Connect manifold gauge set to service valves. Close all doors and windows. Insert thermometer in center vent.
  2. Place climate control panel in recirculated air mode and blower motor on highest speed. Run engine at 1500 RPM for 10 minutes to allow A/C system to stabilize.
  3. Temperature must be 33-47°F (.6-8°C) at center vent. Ensure high side pressure is within specification. See A/C SYSTEM HIGH SIDE PRESSURE SPECIFICATIONS  table. Low side pressure should remain constant at 23.5-47 psi (1.65-3.30 kg/cm2 ) throughout normal operating range.
A/C SYSTEM HIGH SIDE PRESSURE SPECIFICATIONS

Ambient Temp. °F (°C) Pressure psi (kg/cm2 )
60 (16) 75-175 (5.3-12.3)
70 (21) 100-200 (7-14)
80 (27) 125-230 (8.8-16.2)
90 (32) 150-260 (10.5-18.3)
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