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HOMESERVICE MANUALSOLDSMOBILE2004BRAVADA RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 795 (HVAC SYSTEM)REFRIGERANT SYSTEMREFRIGERANT PRESSURE CHECK
2004 Oldsmobile Bravada RWD

Refrigerant Pressure Check

2004 Oldsmobile Bravada RWDSECTION Refrigerant Pressure Check
WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the SST  (49 C061 0A0B). REFRIGERANT SYSTEM GENERAL PROCEDURES. 
  2. Start the engine and after it is warmed up, run it at a constant 1,500 rpm. 
  3. Set the fan speed MAX HI.
  4. Turn the A/C switch on.
  5. Set to RECIRCULATE mode.
  6. Set the temperature control to MAX COLD.
  7. Set to VENT mode.
  8. Close all the doors and all the windows.
  9. Measure the ambient temperature and high-and low-pressure side reading of the SST  (49 C061 001A).
  10. Verify that the intersection of the pressure reading of the SST  (49 C061 001A) and ambient temperature is in the shaded zone.
    • If there is any malfunction, inspect the refrigerant system according to the troubleshooting chart.
    Fig 1: Manifold Gauge Pressure Reading Vs. Ambient Temperature Graph
    G00975539Courtesy of MAZDA MOTORS CORP.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.