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Home >> Chevrolet >> 2010 >> Traverse LT, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 473 (Heating, Ventilation, And Air Conditioning) >> Diagnostic Information and Procedures >> Air Conditioning (A/C) System Performance Test >> Test Description

Test Description

WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 1 

    This step determines if the A/C system has at least the minimum refrigerant charge required to operate the system without damage.

  2. 2 

    This step measures the performance of the A/C system.

  3. 3 

    This step is to allow for vehicle variations as well as high ambient temperatures.

Step Action Values Yes No
NOTE:
  • The ambient air temperature must be at least 16°C (60°F).
  • Do not induce additional air flow across the front of the vehicle during the test.
  • If you were sent here from a DTC diagnostic table, clear the DTC upon completion of this test.
1 
  1. Park the vehicle inside or in the shade.
  2. Open the windows in order to ventilate the interior of the vehicle.
  3. If the A/C system was operating, allow the A/C system to equalize for about 2 minutes.
  4. Turn OFF the ignition.
  5. Install the J 43600  ACR 2000 air conditioning service center.
  6. Record the ambient air temperature displayed on the J 43600  ACR 2000 air conditioning service center.
  7. Record the low and high side STATIC pressure readings.
Are both the low side and high side pressures within the specified value?		 More than 16°C (60°F) - 345 kPa (50 psi)
More than 24°C (75°F) - 483 kPa (70 psi)
More than 33°C (90°F) - 690 kPa (100 psi)		 Go to Step 2  Go to Leak Testing 
2 
    NOTE:

    Record the relative humidity and the ambient air temperature at the time of the test.

  1. Close the vehicle doors and windows.
  2. Open the drivers door window 12.7-15.2 cm (5-6 in).
  3. Select the following HVAC control settings:
    • The A/C is ON
    • The coldest temperature setting
    • The maximum blower speed
    • Recirculation mode
    • The panel outlet mode
    • All panel outlets are OPEN
  4. Install the temperature probes of the J 43600  ACR 2000 air conditioning service center in the left and right center panel air outlets.
  5. Apply the parking brake.
  6. Place the transaxle/transmission in PARK.
  7. Start the engine.
  8. Operate the A/C system for 5 minutes.
  9. Inspect A/C components for the following conditions:
    • Abnormal frost areas
    • Unusual noises
    10. NOTE:

    Press the RESET button, before using the print function of the J 43600  ACR 2000 air conditioning service center.

  10. Print the following information:
    • The panel outlet air temperatures
    • The low-side pressure
    • The high-side pressure
  11. Compare the low and high side pressures and the panel output temperatures to the A/C performance table below.
Does all the data recorded fall within the specified ranges of the A/C performance table?		 - Go to Step 5  Go to Step 3 
3  If the pressures and temperatures recorded do not fall within the specified ranges:
  1. Continue to operate the A/C system for an additional 5 minutes.
  2. RESET the J 43600  ACR 2000 air conditioning service center and record the pressures and temperatures again.
  3. Compare the low and high side pressures and the panel output temperature to the A/C performance table.

Does all the data recorded fall within the specified ranges of the A/C performance table?		 - Go to Step 5  Go to Step 4 
4 Perform the necessary repairs. Refer to A/C Diagnostics Chart .
Is the action complete?		 - Go to Step 5  -
5 Operate the system in order to verify the test results.
Did you find the same results?		 - System OK Go to Symptoms - HVAC Systems - Manual
A/C Performance Table

Ambient Temperature Relative Humidity Low Side Service Port Pressure High Side Service Port Pressure Maximum Left Center Discharge Air Temperature Maximum Left Rear Discharge Air Temperature
13-18°C (55-65°F) 0-100% 151-234 kPa (22-34 psi) 861-1198 kPa (125-174 psi) 8°C (46°F) 13°C (54°F)
19-24°C (66-75°F) Below 40% 151-248 kPa (22-36 psi) 930-1267 kPa (135-184 psi) 9°C (48°F) 12°C (52°F)
Above 40% 172-282 kPa (25-41 psi) 1012-1371 kPa (147-199 psi) 13°C (54°F) 15°C (59°F)
25-29°C (76-85°F) Below 35% 192-282 kPa (28-41 psi) 1129-1412 kPa (164-205 psi) 12°C (52°F) 14°C (57°F)
35-50% 206-289 kPa (30-42 psi) 1178-1440 kPa (171-209 psi) 13°C (54°F) 15°C (59°F)
Above 50% 220-316 kPa (32-46 psi) 1212-1508 kPa (176-219 psi) 14°C (57°F) 18°C (64°F)
30-35°C (86-95°F) Below 30% 227-316 kPa (33-46 psi) 1281-1577 kPa (186-229 psi) 14°C (57°F) 18°C (64°F)
30-50% 234-330 kPa (34-48 psi) 1322-1619 kPa (192-235 psi) 17°C (61°F) 18°C (64°F)
Above 50% 254-351 kPa (37-51 psi) 1357-1667 kPa (197-242 psi) 18°C (64°F) 20°C (68°F)
36-41°C (96-105°F) Below 20% 261-351 kPa (38-51 psi) 1460-1743 kPa (212-253 psi) 18°C (64°F) 20°C (68°F)
20-40% 268-365 kPa (39-53 psi) 1481-1770 kPa (215-257 psi) 18°C (64°F) 22°C (70°F)
Above 40% 282-378 kPa (41-55 psi) 1522-1812 kPa (221-263 psi) 20°C (68°F) 23°C (73°F)
42-46°C (106-115°F) Below 20% 310-385 kPa (45-56 psi) 1639-1887 kPa (238-274 psi) 20°C (68°F) 23°C (73°F)
Above 20% 316-399 kPa (46-58 psi) 1660-1922 kPa (241-279 psi) 22°C (70°F) 24°C (75°F)
47-49°C (116-120°F) Below 30% 351-427 kPa (51-62 psi) 1812-2060 kPa (263-299 psi) 24°C (75°F) 27°C (79°F)
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