LEMON Manuals: Even more car manuals for everyone
Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 32 (Manual A/C-Heater Systems - HVAC) >> System Tests >> Refrigerant Charge Check

Refrigerant Charge Check

WARNING: This page is about a different car, the 2002 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the manifold gauge set. See MANIFOLD GAUGE SET INSTALLATION  .
  2. Inspect the refrigerant pressure reading with the engine stopped.
  3. Verify that the high- and low-pressure side readings of the manifold gauge are at 493-788 kPa (5.02-8.04 kgf/cm 2  , 72-114 psi)  .
    • If the pressure readings are lower than specified, recharge the refrigerant amount.
    • If the pressure readings are within the specification but there is insufficient cooling, go to the next step.
    • If the pressure readings are within the specification and there is no leakage, the refrigerant amount is OK.
  4. Start the engine and run it at a constant 2,000 RPM  .
  5. Turn the A/C switch on and set the fan switch to 4th speed.
  6. Set the RECIRCULATE mode.
    • If the A/C compressor is short-cycling, go to next step.
  7. Verify the low-pressure side reading at which the magnetic clutch kicks out.
    • If the pressure is 170 kPa (1.7 kgf/cm 2  , 24 psi)  or lower, evacuate then recharge the refrigerant system with the proper amount of refrigerant. See REFRIGERANT CHARGING  .
    • If the pressure is 210 kPa (2.1 kgf/cm 2  , 30 psi)  or higher, inspect the thermosensor. See THERMOSENSOR INSPECTION  .
    Fig 1: Identifying Gauge Readings
    G01197628Courtesy of MAZDA MOTORS CORP.
scientia non olet · About LEMON Manuals