Download Heater & Air Condition (Section HA)
Manual DescriptionTrouble Diagnosis For Unusual Pressure 7, fOR MEXICO : Precaution for Supplemental Restraint System (SRS) "AIR BAG" "SEAT BELT, fOR MEXICO : Precaution Necessary for Steering Wheel Rotation After Battery Disconnect18, fOR MEXICO : Precaution Procedure without.
FOR MEXICO : Precautions For Xenon Headlamp, fOR MEXICO : Working with HFC-134a (R-134a) 19, fOR MEXICO : General Refrigerant Precaution19, for Steering Wheel Rotation After Battery Disconnect 11.
CONDENSER : Removal Installation 49, lIQUID TANK : Removal Installation 50, rEFRIGERANT PRESSURE SENSOR : Removal Installation 50, a/C UNIT ASSEMBLY : Removal Installation 54.
COMPRESSOR : Removal Installation 43, hEATER CORE : Removal Installation 55, mAGNET CLUTCH : Removal Installation, eVAPORATOR : Removal Installation 56.
HIGH-PRESSURE PIPE : Removal Installation 47, eVAPORATOR PIPE ASSEMBLY : Removal, eXPANSION VALVE : Removal Installation 57, verify the symptom with operational check.
Go to appropriate trouble diagnosis (Refer to HAC-182, "Diagnosis Chart By Symptom" below), repair or replace specific parts, the refrigerant flows from the compressor, through the condenser with liquid tank, through evaporator, expansion valve, located inside evaporator case.
To prevent evaporator from freezing up, the evaporator air temperature is monitored, and voltage signal, the refrigerant system is protected against excessively high- or low-pressures by the refrigerant pressure sensor, located on the liquid tank, and sends the voltage signal to the ECM if the system pressure rises above, or falls below specifications, eCM makes the A/C relay go OFF and stops the compressor when pressure high-pressure side.
Detected by refrigerant pressure sensor is over approximately 3,120 kPa (31, the refrigerant system is also protected by a pressure relief valve, located in the rear head compressor, the release port on the pressure relief valve automatically opens and releases refrigerant into atmosphere, when the pressure of refrigerant in the system increases to an unusual level [more than 3.
Intakes, compresses, and discharges refrigerant, to circulate refrigerant inside refrigerant cycle, cools refrigerant discharged from compressor, and transforms it liquid refrigerant, eliminates foreign matter in refrigerant, and stores temporarily liquid refrigerant, refer to "Description" (EXCEPT FOR MEXICO) or EC-759, "Description" (FOR MEXICO).
Transforms high-pressure liquid refrigerant to mist form low-pressure liquid refrigerant by drawing, the mist form liquid refrigerant transforms to gas by evaporation by the air conveyed blower, diagnose using a manifold gauge whenever system's high and/or low side pressure(s) is/are unusual, marker above the gauge scale in the following tables indicates the standard (usual) pressure range.
Above table (Ambient air temperature-to-operating pressure table) since the standard (usual) pressure, however, differs vehicle vehicle, air suction by cooling fan insufficient, the pressure returns to normal is reduced soon after water splashed condenser, reduce refrigerant until specified pressure obtained.
Excessive refrigerant dis An area low-pressure, expansion valve is open a litnear evaporator outlet, tle compared with the speci Low-pressure pipe somefication, however, liquid tank not so.
High-pressure tube or parts located between compressor, no temperature difference between high- low-pressure, liquid tank inlet and expansion valve frosted, expansion valve inlet temperature extremely low.
Temperature difference occurs somewhere highpressure side, high-pressure pipe located between liquid tank and expansion valve clogged, tank are warm slightly cool.