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INSUFFICIENT COOLING HAC-179 < SYMPTOM DIAGNOSIS > [MANUAL AIR CONDITIONER] C D E F G H J K L M A B HAC N O P TEST READING Recirculating-to-discharge Air Temperature Table Ambient Air Temperature-to-operating Pressure Table Trouble Diagnoses for Abnormal Pressure INFOID:0000000003935991 Whenever system ′ s high and/or low side pressure is abnormal, diagnose using a manifold gauge. The marker above the gauge scale in the following tables indicates the standard (usual) pressure range. Since the stan- Vehicle location Indoors or in the shade (in a well-ventilated place) Doors Closed Door window Open Hood Open TEMP. Max. COLD Mode switch (Ventilation) set Recirculation (REC) switch (Recirculation) set Blower speed Max. speed set Engine speed Idle speed Operate the air conditioning system for 10 minutes before taking measurements. Inside air (Recirculating air) at blower assembly inlet Discharge air temperature at center ventilator ° C ( ° F) Relative humidity % Air temperature ° C ( ° F) 50 - 60 20 (68) 5.3 - 6.5 (42 - 44) 25 (77) 9.7 - 11.5 (49 - 53) 30 (86) 13.8 - 16.3 (57 - 61) 35 (95) 18.0 - 21.2 (64 - 70) 40 (104) 22.2 - 25.7 (72 - 78) 60 - 70 20 (68) 6.5 - 7.7 (44 - 46) 25 (77) 11.5 - 13.3 (53 - 56) 30 (86) 16.3 - 18.8 (61 - 66) 35 (95) 21.2 - 24.0 (70 - 75) 40 (104) 25.7 - 29.2 (78 - 85) Ambient air High-pressure (Discharge side) kPa (kg/cm 2 , psi) Low-pressure (Suction side) kPa (kg/cm 2 , psi) Relative humidity % Air temperature ° C ( ° F) 50 - 70 20 (68) 680 - 840 (6.94 - 8.57, 98.6 - 121.8) 160 - 198 (1.63 - 2.02, 23.2 - 28.7) 25 (77) 800 - 985 (8.16 - 10.05, 116.0 - 142.8) 198 - 245 (2.02 - 2.50, 28.7 - 35.5) 30 (86) 940 - 1,150 (9.59 - 11.73, 136.3 - 166.8) 225 - 278 (2.30 - 2.84, 32.6 - 40.3) 35 (95) 1,160 - 1,410 (11.83 - 14.38, 168.2 - 204.5) 273 - 335 (2.78 - 3.42, 39.6 - 48.6) 40 (104) 1,325 - 1,620 (13.52 - 16.52, 192.1 - 234.9) 325 - 398 (3.32 - 4.06, 47.1 - 57.7) 2009 Pathfinder |