SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSOLDSMOBILE2004BRAVADA AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 25 (HVAC SYSTEMS - AUTOMATIC)PERFORMANCE TESTSA/C SYSTEM PERFORMANCE
2004 Oldsmobile Bravada AWD

A/C System Performance

2004 Oldsmobile Bravada AWDSECTION A/C System Performance
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Perform test with ambient air temperature 60°F (16°C) or more. Do not provide additional airflow to front of vehicle during test. If you were sent here from a DTC test, clear DTC upon completion of test.
  1. Park vehicle in shaded area. Open windows to ventilate interior. If A/C system was operating, allow A/C system to stabilize for 2 minutes. Turn ignition off. Install the J-43600 or equivalent and record ambient temperature and relative humidity. Are both the low side and high side pressures within the specified value? See A/C PERFORMANCE SPECIFICATIONS (3.5L V6 ENGINE)  or A/C PERFORMANCE SPECIFICATIONS (4.0L V8 ENGINE)  tables. If so, go to next step. If not, see LEAK TESTING in GENERAL SERVICING under HVAC.
    2. NOTE: Record the relative humidity and the ambient air temperature at the time of the test.
  2. Close doors and windows. Open driver's window 5-6". Select the following control settings:
    • The A/C is ON
    • The maximum blower speed
    • The Vent mode
    • The coldest temperature setting
    • All A/C outlets are OPEN

    Install the temperature probes of the J-43600 in the left and right center A/C air outlets. Apply the parking brake. Place the transaxle/transmission in Park or Neutral. Start the engine. Operate the A/C system for 5 minutes. Inspect A/C components for abnormal frost areas and unusual noises. Print the Outlet Air Temperatures, Low-Side Pressure and High-Side Pressure. Compare results to the A/C Performance Table. See A/C PERFORMANCE SPECIFICATIONS (3.5L V6 ENGINE)  or A/C PERFORMANCE SPECIFICATIONS (4.0L V8 ENGINE)  tables. Does all the data recorded fall within the specified ranges of the table? If so, go to step  4. If not, go to next step.

  3. If the pressures and temperatures recorded do not fall within the specified ranges, Continue to operate the A/C system for an additional 5 minutes and RESET the J-43600 and record the pressures and temperatures again. Compare the low and high side pressures and the output temperature to the A/C Performance Table. Does all the data recorded fall within the specified ranges? If so, go to step  8. If not, go to next step.
  4. Do the high and low side pressures fall within the specified ranges, but the outlet temperatures do not? If so, see A/C PRESSURE ZONE "A" DIAGNOSIS . If not go to next step.
  5. Is the low side pressure greater than the specified range, but the high side pressure within or less than the specified range? If so, see A/C PRESSURE ZONE "B" DIAGNOSIS . If not, go to next step.
  6. Are the low and high side pressures both greater than the specified ranges? If so, see A/C PRESSURE ZONE "C" DIAGNOSIS . If not, go to next step.
  7. Is the high side pressure greater than the specified range, but the low side pressure is within or less than the specified range? If so, see A/C PRESSURE ZONE "D" DIAGNOSIS . If not, go to next step.
  8. Operate the system in order to verify the test results. Did you find the same results? If so, system is okay. If not, see SYMPTOM DIAGNOSIS  under TROUBLE SHOOTING.
A/C PERFORMANCE SPECIFICATIONS (3.5L V6 ENGINE)

Ambient Temp. - °F (°C) Relative Humidity Outlet Temp. - °F (°C) Low Side Pressure - psi (kg/cm2 ) High Side Pressure - psi (kg/cm2 )
60 (16) 0-100% 45 (7) 24-30 (1.7-2.1) 158-188 (11.1-13.2)
70 (21) 40% 51 (11) 28-34 (2.0-2.4) 127-157 (8.9-11.0)
80 (27) 60% 59 (15) 33-39 (2.3-2.7) 182-212 (12.8-14.9)
90 (32) 30% 66 (19) 33-39 (2.3-2.7) 173-203 (12.2-14.3)
100 (38) 40% 71 (22) 36-46 (2.5-3.2) 196-236 (13.8-16.6)
110 (43) 20% 76 (24) 45-55 (3.2-3.9) 223-263 (15.7-18.5)
120 (49) 30% (1) 74 (23) 50-60 (3.5-4.2) 261-301 (18.4-21.2)
(1) Relative humidity is less than stated value
A/C PERFORMANCE SPECIFICATIONS (4.0L V8 ENGINE)

Ambient Temp. - °F (°C) Relative Humidity Outlet Temp. - °F (°C) Low Side Pressure - psi (kg/cm2 ) High Side Pressure - psi (kg/cm2 )
60 (16) 0-100% 45 (7) 31-37 (2.2-2.6) 102-132 (7.2-9.3)
70 (21) 40% 51 (11) 36-42 (2.5-3.0) 138-168 (9.7-11.8)
80 (27) 60% 59 (15) 43-49 (3.0-3.4) 164-194 (11.5-13.6)
90 (32) 60% 66 (19) 51-57 (3.6-4.0) 199-229 (14.0-16.1)
100 (38) 30% 71 (22) 55-65 (3.9-4.6) 225-265 (15.8-18.6)
110 (43) 25% 76 (24) 60-70 (4.2-4.9) 254-294 (17.9-20.7)
120 (49) 30% (1) 74 (23) 61-71 (4.3-5.0) 277-317 (19.5-22.3)
(1) Relative humidity is less than stated value
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.