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Makes 🢒 Pontiac 🢒 2005 🢒 Bonneville 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 Air Conditioning (A/C) System Performance Test

Air Conditioning (A/C) System Performance Test L36

Table 1: A/C Performance Table

This test measures the operating efficiency of the A/C system under the following conditions:

    • The current ambient air temperature
    • The current relative humidity
    • The high side pressure of the A/C system
    • The low side pressure of the A/C system
    • The temperature of the air being discharged into the passenger compartment

Test Description

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

  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

Important: 

   • 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 .
  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

    Important: 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. For automatic systems select the following HVAC control settings:
    4. • The AUTO button. The system will automatically perform the following functions:
       - Enter the recirculation mode.
       - Set the temperature to the coldest setting.
       - Set the maximum blower speed.
    • All A/C outlets set to OPEN
  4. For manual systems select the following HVAC control settings:
    5. • The Vent mode
    • The Recirculation mode
    • The MAX A/C set to ON
    • The coldest temperature setting
    • The maximum blower speed
    • All A/C outlets set to OPEN
  5. Install the temperature probes of the J 43600 in the left and right center panel air outlets.
  6. Apply the parking brake.
  7. Place the transaxle/transmission in one of the following positions:
    8. • PARK (Automatic)
    • NEUTRAL (Manual)
  8. Start the engine.
  9. Operate the A/C system for 5 minutes.
  10. Inspect the A/C components for the following conditions:
    11. • Abnormal frost areas
    • Unusual noises

    Important: Press the RESET button, before using the print function of the J 43600 .

  11. Print the following information:
    12. • The panel outlet air temperatures
    • The low-side pressure
    • The high-side pressure
  12. 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 8

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 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 8

Go to Step 4

4

Do the high and low side pressures fall within the specified ranges, but the panel outlet temperatures do not?

--

Go to Air Conditioning (A/C) Diagnostics - Pressure Zone A

Go to Step 5

5

Is the low side pressure greater than the specified range, but the high side pressure within or less than the specified range?

--

Go to Air Conditioning (A/C) Diagnostics - Pressure Zone B

Go to Step 6

6

Are the low and high side pressures both greater than the specified ranges?

--

Go to Air Conditioning (A/C) Diagnostics - Pressure Zone C

Go to Step 7

7

Is the high side pressure greater than the specified range, but the low side pressure is within or less than the specified range?

--

Go to Air Conditioning (A/C) Diagnostics - Pressure Zone D

Go to Step 8

8

Operate the system in order to verify the test results.

Did you find the same results?

--

System OK

Go to Symptoms - HVAC Systems - Manual in HVAC Systems - Manual or Symptoms - HVAC Systems - Automatic in HVAC Systems - Automatic

A/C System Pressure -- Zone Classification
Object Number: 714776 Size: MF

A/C Performance Table

Ambient Air Temperature

Relative Humidity

Service Port Pressure

Maximum Left Center Discharge Air Temperature

Low Side

High Side

16-20°C (60-69°F)

0-100%

193-234 kPa (28-34 psi)

896-1103 kPa (130-160 psi)

9°C (49°F)

21-26°C (70-79°F)

Below 40%

221-262 kPa (32-38 psi)

1103-1310 kPa (160-190 psi)

11°C (52°F)

Above 40%

234-276 kPa (34-40 psi)

1207-1413 kPa (175-205 psi)

11°C (52°F)

27-31°C (80-89°F)

Below 40%

228-269 kPa (33-39 psi)

1069-1276 kPa (155-185 psi)

12°C (54°F)

Above 40%

255-296 kPa (37-43 psi)

1241-1448 kPa (180-210 psi)

13°C (55°F)

32-27°C (90-99°F)

Below 30%

262-303 kPa (38-44 psi)

1241-1448 kPa (180-210 psi)

12°C (53°F)

Above 30%

283-324 kPa (41-47 psi)

1241-1448 kPa (180-210 psi)

16°C (60°F)

38-42°C (100-109°F)

Below 30%

296-365 kPa (43-53 psi)

1448-1724 kPa (210-250 psi)

16°C (61°F)

Above 30%

354-414 kPa (46-56 psi)

1551-1827 kPa (210-250 psi)

18°C (65°F)

43-48°C (110-119°F)

Below 15%

296-365 kPa (43-53 psi)

1586-1862 kPa (230-270 psi)

17°C (62°F)

Above 15%

365-434 kPa (50-60 psi)

1758-2034 kPa (255-295 psi)

22°C (71°F)

49°C (120°F) and above

Below 30%

400-469 kPa (58-68 psi)

1896-2172 kPa (275-315 psi)

23°C (73°F)

Air Conditioning (A/C) System Performance Test LD8

Table 1: A/C Performance Table

This test measures the operating efficiency of the A/C system for the following conditions:

    • The current ambient air temperature (AAT)
    • The current relative humidity
    • The high side pressure of the A/C system
    • The low side pressure of the A/C system
    • The temperature of the air being discharged into the passenger compartment

Test Description

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

  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

Important: 

   • The ambient air temperature (AAT) must be at least 16°C (60°F) .
   • Do not induce additional airflow 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 air conditioning (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 AAT displayed on the J 43600 .
  7. Record the low and high side STATIC pressure readings.

Are both the low side and high side pressures within the specified value?

Greater than 16°C (60°F), 345 kPa (50 psi)

Greater than 24°C (75°F), 483 kPa (70 psi)

Greater than 33°C (90°F), 690 kPa (100 psi)

Go to Step 2

Go to Leak Testing

2

    Important: Record the relative humidity and the AAT at the time of the test.

  1. Close the vehicle doors and windows.
  2. Open the driver door window 12.7-15.2 cm (5-6 in).
  3. For automatic systems, select the following HVAC control settings:
    4. • The AUTO button--The system will automatically perform the following functions:
       - Enter the recirculation mode
       - Set the temperature to the coldest setting
       - Set the maximum blower speed
    • All A/C outlets set to OPEN
  4. For manual systems, select the following HVAC control settings:
    5. • The vent mode
    • The recirculation mode
    • The MAX A/C set to ON
    • The coldest temperature setting
    • The maximum blower speed
    • All A/C outlets set to OPEN
  5. Install the temperature probes of the J 43600 in the left and right center panel air outlets.
  6. Apply the parking brake.
  7. Place the transaxle/transmission in one of the following positions:
    8. • PARK - for automatic transmissions (A/T)
    • NEUTRAL - for manual transmissions (M/T)
  8. Start the engine.
  9. Operate the A/C system for 5 minutes.
  10. Inspect the A/C components for the following conditions:
    11. • Abnormal frost areas
    • Unusual noises

    Important: Press the RESET button before using the print function of the J 43600 .

  11. Print the following information:
    12. • The panel outlet air temperatures
    • The low-side pressure
    • The high-side pressure
  12. 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 8

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 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 8

Go to Step 4

4

Do the high and low side pressures fall within the specified ranges, but the panel outlet temperatures do not?

--

Go to Air Conditioning (A/C) Diagnostics - Pressure Zone A

Go to Step 5

5

Is the low side pressure greater than the specified range, but the high side pressure within or less than the specified range?

--

Go to Air Conditioning (A/C) Diagnostics - Pressure Zone B

Go to Step 6

6

Are the low and high side pressures both greater than the specified ranges?

--

Go to Air Conditioning (A/C) Diagnostics - Pressure Zone C

Go to Step 7

7

Is the high side pressure greater than the specified range, but the low side pressure is within or less than the specified range?

--

Go to Air Conditioning (A/C) Diagnostics - Pressure Zone D

Go to Step 8

8

Operate the system in order to verify the test results.

Did you find the same results?

--

System OK

Go to Symptoms - HVAC Systems - Manual in HVAC Systems - Manual or Symptoms - HVAC Systems - Automatic in HVAC Systems - Automatic

A/C System Pressure - Zone Classification
Object Number: 1401105 Size: MF

A/C Performance Table

Ambient Air Temperature

Relative Humidity

Service Port Pressure

Maximum Left Center Discharge Air Temperature

Low Side

High Side

13-18°C (55-65°F)

0-100%

168-262 kPa (24-38 psi)

660-960 kPa (96-139 psi)

8°C (46°F)

19-24°C (66-75°F)

Below 40%

177-283 kPa (26-41 psi)

770-1090 kPa (112-158 psi)

9°C (48°F)

Above 40%

202-310 kPa (29-45 psi)

820-1140 kPa (119-165 psi)

11°C (52°F)

25-29°C (76-85°F)

Below 35%

225-318 kPa (33-46 psi)

980-1240 kPa (142-180 psi)

11°C (52°F)

35-50%

239-341 kPa (35-47 psi)

1000-1260 kPa (145-183 psi)

12°C (54°F)

Above 50%

250-323 kPa (36-49 psi)

1020-1300 kPa (148-189 psi)

13°C (55°F)

30-35°C (86-95°F)

Below 30%

262-350 kPa (38-51 psi)

1140-1430 kPa (165-208 psi)

13°C (55°F)

35-50%

271-363 kPa (39-53 psi)

1160-1450 kPa (168-210 psi)

14°C (57°F)

Above 50%

283-377 kPa (41-55 psi)

1180-1480 kPa (171-215 psi)

16°C (61°F)

36-41°C (96-105°F)

Below 20%

304-392 kPa (44-57 psi)

1330-1620 kPa (193-235 psi)

15°C (59°F)

20-40%

310-399 kPa (45-58 psi)

1340-1630 kPa (194-237 psi)

16°C (61°F)

Above 40%

318-406 kPa (46-59 psi)

1360-1650 kPa (197-239 psi)

18°C (64°F)

42-46°C (106-115°F)

Below 20%

350-428 kPa (51-62 psi)

1530-1780 kPa (222-258 psi)

18°C (64°F)

Above 20%

350-433 kPa (51-63 psi)

1540-1790 kPa (224-260 psi)

19°C (66°F)

47-49°C (116-120°F) and above

Below 30%

388-452 kPa (56-66 psi)

1700-1880 kPa (247-273 psi)

19°C (66°F)